J.30 LPGBS Checklist.xls
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- Power Systems Design & Install 2
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- 6973GH-26-R-00018
About this file
This document is a comprehensive Lightning Protection, Grounding, Bonding, and Shielding (LPGBS) checklist for Federal Aviation Administration (FAA) tower facilities. The detailed checklist covers multiple tower types including large towers with and without radomes, medium towers, and monopole towers, providing extensive technical guidance for inspecting and evaluating lightning protection systems, earth electrode systems, grounding infrastructure, surge protective devices, electrical service grounding, and related electronic equipment bonding.
The checklist is structured with multiple sections addressing specific technical requirements, such as air terminal specifications, down conductor configurations, metallic object bonding, ground plate installations, and electrical service grounding. It references standards including FAA-STD-019F, NFPA 780, and NEC, and includes comprehensive inspection criteria for components like ground rods, conductors, connectors, and protective devices. Each section allows for detailed documentation of equipment condition, compliance status, and recommendations, with provisions for categorizing facility condition as red, yellow, or green based on the survey findings.
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Lrge Twr w Radome Checklist
| Large Tower with Radome | ||||||
| Note: The below addresses common large towers with radomes used in ASR, ARSR, TDWR, NEXRAD, etc. Other systems such as small radomes (e.g. ADSE. ASDB, rotodomes, etc) may have special protection solutions that change the requirements for air terminals. This requires immediate onsite consultation with the LPGBS program office. Skip this section if NOT a large tower with a radome. | ||||||
| Radome Air Terminals | Y | N | N/A | |||
| 5.6. | Ensure you have the appropriate site specific and program standard construction drawings. | |||||
| 5.7. | Does the tower contain a small radome such as ADSE, ASDB, rotodomes, etc.? | |||||
| If yes, consult with the LPGBS program office. | ||||||
| 5.8. | What is the material and construction of the radome? (Metallic frame, self-supported Fiberglas/foam, etc.) | |||||
| 5.9. | Is an air terminal at the peak and at least four circumferential air terminals equally spaced along the dome circumference perpendicular to the radome? | |||||
| 5.10. | What is the condition of the air terminals? (e.g., broken, bent, loose, missing, etc.) | |||||
| 5.11. | Are air terminals’ dimensions correct as stated in the site specific? | Material: Diameter: Length: | ||||
| Note: (1) Copper: Minimum 12 in. high, ½ in. diameter, or (2) Aluminum: Minimum 12 in. high, 5/8 in. diameter. | ||||||
| 5.12. | If the air terminal is installed with a riser, what is the total height of air terminal + riser? | Total Height: | ||||
| 5.13. | Is the tip of air terminals rounded? | |||||
| If not, describe it (e.g., pointed, ball, splines, etc.) | ||||||
| 5.14. | Does each air terminal have a minimum of two paths to the EES? | |||||
| Radome Down Conductors and Fittings | Y | N | N/A | |||
| 5.15. | Is the condition of the down conductors inside the radome good? (e.g., not broken, unfastened, missing bolts, sharp turns, loose, etc.) | |||||
| Note: dome maintainer’s group does torqueing checks. This is not part of this checklist. | ||||||
| 5.16. | Are the down conductors inside the radome made of copper and at minimum classified as Class II as defined by NFPA 780? | |||||
| Note: Tinned copper can be confused with aluminum. If questionable, investigate further (scrape material). | ||||||
| 5.17. | Are lightning conductors inside the radome constructed of either rope lay or braid? | Describe the kind of cable used (rope lay, braided, twisted, other?) | ||||
| 5.18. | Are the internal radome down conductors fastened at intervals not exceeding 3 ft.? | |||||
| Note: fastener is a hardware device that secures the | ||||||
| conductor) | ||||||
| 5.19. | Do internal radome down conductor turns and bends follow a radius of more than 12 inches? Note: This is a design-driven criterion for a large tower with radome. | |||||
| 5.20. | Is the condition of the perimeter conductor that forms a loop around the base of the radome good? | |||||
| (e.g., broken connection and bonding, unfastened, corroded, sharp sweep, etc.) | ||||||
| External Down Conductors and Fittings | Y | N | N/A | |||
| (Starting at the perimeter ring inside the dome and exiting to tower down conductors) | ||||||
| 5.21. | Provide a general description of the tower site. (Height, area, number of legs, leg’ shape L-angular or tubular, material, etc.) | |||||
| 5.22. | Is there a down conductor at each leg of the tower? | |||||
| 5.23. | Is the condition of the down conductors good? (E.g., not broken, good bonding connection, not unfastened, no missing, no sharp turns, etc.) | |||||
| 5.24. | Are all leg down conductors properly connected and bonded to the perimeter conductor at the base of the radome? (Mechanical or exothermic bonding, through PVC, bimetallic connections, etc.) | Describe: | ||||
| 5.25. | Do external down conductor turns and bends follow a radius of at least 8 inches? | |||||
| 5.26. | Is the fastener material the same or compatible with the conductor? | |||||
| 5.27. | Are the down conductors secured approximately every 3 ft? | |||||
| 5.28. | Are the horizontal to vertical lightning conductor transitions installed as per the drawing at right? | |||||
| 5.29. | Is the down conductor bonded to each stacked section of the tower? If so, is the condition of this bonding connection satisfactory? (Check for corrosion or other impurities) | |||||
| 5.30. | Are all fittings the same material as that of the conductors, or compatible with the conductors? If not, is a bimetallic connector used to transition from aluminum to copper conductors? | Identify what is needed to ensure compliance: | ||||
| Note: FAA-STD-019e: Copper and bronze fittings shall be used with copper conductors. Aluminum fittings may only be used with aluminum conductors. Bolt pressure connection recommended. Crimp-type fittings are not allowed. | ||||||
| 5.31. | Describe the external down conductor’s fittings (exothermic, double bolted/single, weld, etc.) | |||||
| 5.32. | Is the tower height equal to or greater than 60 feet from the base to the tower’s top platform? | |||||
| If so, are potential equalization loops installed at intermediate tower heights, evenly spaced and no more than 60 ft. apart (measured from the tower platform)? | ||||||
| 5.33. | Does the external down conductor maintain a downward course to the EES? | |||||
| 5.34. | Are the down conductors routed down the outer side of each tower leg whenever possible? | |||||
| 5.35. | Are the down conductors exothermically welded to each tower leg section? | |||||
| 5.36. | Are the down conductors secured every 3 feet? | |||||
| 5.37. | Is each down conductor exothermically welded to the base of each tower leg? | |||||
| 5.38. | Is each tower leg at the base exothermically welded to a bare 4/0 copper conductor before entering the ground and then exothermically welded to the EES? | |||||
| Is the bottom door at the base of the tower exothermically bonded to the EES? | ||||||
| 5.39. | Are the down conductors routed away from signal/power conductors to the maximum possible extent (lateral separation)? | Separation distance: Parallel/perpendicular/crossing: | ||||
| Metallic Objects Near External Down Conductors | Y | N | N/A | |||
| 5.40. | Are all exterior metal objects within 6 ft of a down conductor properly bonded to the down conductor? | |||||
| Material: Cable type: Cable size: No. of strands: | ||||||
| Connection type (welded, single/double bolt): | ||||||
| 5.41. | Are horizontal metal transitions (stairwell walkways, platforms, landings, structures, etc.) bonded to structural steel and/or rebar? | |||||
| 5.42. | Are bonding jumpers a minimum 2 AWG copper conductors where required? | |||||
| Auxiliary Antennas and Other Metallic Objects Mounted on the Tower Structure | Y | N | N/A | |||
| 5.43 | Are all exterior metal masts on the tower properly bonded to the lightning protection system? | |||||
| Consisting of masts for microwave dishes, parrot antennas, Yagis, obstruction lights, etc. | ||||||
| Guards | Y | N | N/A | |||
| 5.44. | Are the guards made of PVC material? | |||||
| 5.45. | Is the 4/0 AWG conductor routed through a 1-in. PVC conduit around the foundation concrete pier to 12 in.? | |||||
| Grounding Bulkhead Kit | Y | N | N/A | |||
| 5.46. | Skip to Section 12. | |||||
| 6. Earth Electrode System (EES) and Fence Grounding | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Earth Electrode System | ||||||
| Note: There is an EES surrounding the NASEB buildings, EG buildings, and all towers. | ||||||
| 6.1. | In hazardous areas, where exothermic weld may not be used, are hydraulically crimped connections employed? | |||||
| 6.2. | Does the access well exist? | Number of access wells: | ||||
| 6.3. | Does the access well has a 12-in. minimum radius clearance from the center of the ground rod to the inside wall of the access well? | |||||
| If no, what is the space around the rod: | ||||||
| 6.4. | What is the condition of the connections? (e.g., secured, corroded, stacked, broken insulation damaged, dissimilar metals connections, etc.) | |||||
| 6.5. | Using 62% “Fall of Potential” method, does the earth electrode system measure 10 ohms or less or as required in the specification? | |||||
| NOTE: Test distance 5x the facility diameter or at least 150 ft away on undisturbed soil. Connect (P1/C1) to the outer point of the EES grid perimeter. | ||||||
| Gates and Fence Grounding | ||||||
| Note: Some facilities may have had LPGBS upgrades exceeding 019F (e.g., ARSR, TDWR, ASR, etc.). These sites should be maintained to their current level. | ||||||
| 6.6. | Are gates bonded to the adjacent posts? | |||||
| 6.7. | Are the gate connections made of insulated 4/0 AWG flexible (welding) copper conductors or copper straps (1 inch by 1/8 inch)? | |||||
| 6.8. | Is an exothermic weld-type connection used to bond the conductors/straps to the gates/posts? | If not, please describe the bonding method: | ||||
| 6.9. | Are the posts on each side of the gates bonded to the ground rod with 4/0 AWG bare copper conductor? | |||||
| 6.10. | Are both gate posts interconnected and bonded below ground with 4/0 AWG bare copper conductor? | Note: Verify using existing drawing. | ||||
| 6.11. | Is there a horizontal bare 6 AWG stranded tinned copper conductor threaded through the metal fric of the gate? | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 6.12. | At the perimeter fence, is a 6 AWG conductor mechanically bonded to the fence posts at intervals not greater than 40 ft.? | |||||
| Note: Exceeds FAA-019F. See title note. | ||||||
| 6.13. | Is there a buried 4/0 AWG bare copper conductor within 3 ft along and parallel to the fence and bonded to the posts every 40 ft to a ground rod? | |||||
| Note: Exceeds FAA-019F. See title note. | Per FAA-019F: Fence grounding composed of a ground rod adjacent to the fence post located at spacing intervals not greater than 100 ft along the perimeter fence line. Then fence post exothermically welded to each ground rod using a 4/0 AWG bare stranded copper conductor. | |||||
| 6.14. | Are there a minimum of four 4/0 AWG connections installed between the fence EES and facility EES? | |||||
| Note: Exceeds FAA-019F. See title note. | ||||||
| 6.15. | Is there an adjoining non-FAA-owned fence connected to the existing FAA perimeter fence? If so, is it electrically isolated? | |||||
| 7. Service Entrance Grounding | ||||||
| Please also fill in surge protective device information in Section 8, starting on page 41. | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Electrical Service | ||||||
| Caution: This will be a visual inspection due to potentially live circuit hazards. Note any anomalies for later investigation. You may need to open electrical panel covers. This will need to be coordinated with the site's NFPA 70E ops electrical qualified person. | ||||||
| 7.1. | Where is the location of the electrical service entrance? | |||||
| 7.2. | Is the neutral conductor grounded at the utility service transformer? If this grounding connection cannot be verified during visual inspection (e.g., nonaccessible pad mounted), what other information on this connection is available? Explain. | |||||
| 7.3. | Where applicable, is the NEC neutral (white) grounded at the main service disconnecting means? | |||||
| Note: For example, ASR-11service is 480V/3PH/3W. There is no white wire running out of the disconnect into the facility. | ||||||
| 7.4. | Is the grounding electrode conductor properly terminated at the service disconnecting means neutral bus? | |||||
| (e.g., secured, corroded, stacked, broken insulation damaged, etc.) | ||||||
| 7.5. | Is the grounding electrode conductor properly sized? | |||||
| 7.6. | Is the service entrance conduit grounded at the service entrance ground bus? | |||||
| 7.7. | Is the service disconnecting means housing grounded at ground bus? | |||||
| 7.8. | Is the ground bus properly bonded to the neutral bus in the service disconnect enclosure? (main bonding jumper) | |||||
| 7.9. | Are load-side NEC neutral conductors grounded only at the service disconnecting means or at the source of a separately derived system? | |||||
| NOTE: Neutral must not be grounded at any electrical or electronic equipment, raceways, switches, panel boards, or receptacles, etc. | ||||||
| Signal/Control Cables | ||||||
| 7.10. | At how many service entrance locations does each facility have from field/signal/control cable? | |||||
| # of locations: | ||||||
| 7.11. | Where are the locations of the service entrances in #7.10? | |||||
| Highlight these markup location on the drawings. | ||||||
| 7.12. | Roughly how many field/signal/control | |||||
| cables enter the facility? | # of signals: | |||||
| 7.13. | Are there surge protective devices installed for each field/signal/control cable that enters the facility? | |||||
| 7.14. | Are all field cable overall shields grounded at the service entrance? | |||||
| 7.15. | How are field cable shields grounded? | |||||
| 7.16. | Are all cable pair shields/drains grounded at the service entrance? | |||||
| 7.17. | How many cable pair shields are not | # of cables not properly grounded: Calculate percentage: % | ||||
| properly grounded? | Locations: | |||||
| 7.18. | How many cables do not have a surge | # of cables that do not have a surge protective | ||||
| protective device? | device: | |||||
| Calculate percentage: % | ||||||
| Locations: | ||||||
| 7.19. | Are the overhead or underground waveguide, axial cable, and/or conduits feeding into the facility bonded to a bulkhead ground plate? | |||||
| If not, explain how they are grounded. | ||||||
| 8. Surge Protective Devices (SPD) | ||||||
| Also refer to Section 14 on page 59 to record detailed information on each SPD inspected during the site survey. | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Power SPD | ||||||
| Caution: This will be a visual inspection due to potentially live circuit hazards. You may need to open electrical panel covers. This will need to be coordinated with the site's NFPA 70E ops electrical qualified person. | ||||||
| 8.1. | Is there a SPD installed at the service disconnecting means? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.2. | If #8.1 is yes, is the SPD installed at the load side of the service disconnecting means? | |||||
| 8.3. | Is there a SPD installed at any other facility penetration point? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.4. | Is there a SPD installed between the load side of the EG transfer switch and the first feeder panel? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.5. | Is the SPD installed within 12 inches to the service disconnecting means/panel? | |||||
| Distance from SPD to connection point: | ||||||
| 8.6. | Are the connections between terminals using the most direct path without any sharp bend, loop, and kinks? | |||||
| 8.7. | Does the SPD ground conductor match or exceed the size of the grounding electrode conductor? | |||||
| 8.8. | Is the SPD enclosure bonded to the SPD’s ground terminal? | |||||
| 8.9. | Are phase, neutral and equipment grounding conductors properly connected to the corresponding terminals on the SPD? | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 8.10. | Is the conduit connecting the SPD enclosure to the panel sealed with UL-listed, non- flammable material to prevent soot from entering the panel? | |||||
| Signal and Data Lines SPD, including Axial Lines | ||||||
| 8.11. | Are SPDs installed on signal/data lines at the facility entrance? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.12. | For telco/3rd party lines, are SPDs installed on signal/data lines at the point where the lines transfer to FAA control? | |||||
| 8.13. | Is the ground bus or bulkhead plate for the signal lines SPD connected to the EES? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.14. | Is the ground bus conductor or bulkhead conductor running to the EES color coded green with red strips? | Note: Provide cable size, connection type, cable type, path, etc. | ||||
| 9. | Power Distribution and Electrical Grounding | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Separately Derived Source System | ||||||
| 9.1. | See Section 13. | |||||
| NOTE: Use one sheet for each separately derived source system surveyed. | ||||||
| Electrical Grounding | ||||||
| 9.2. | Where isolated ground receptacles are used to reduce electrical noise, are they identified with an orange color on the face of the receptacle? | |||||
| 9.3. | Where used, are isolated ground receptacles (question #9.2) installed in accordance with the requirements of the National Electrical Code? | |||||
| Electrical Support Structures | ||||||
| 9.4. | Are all electrical single conductors, cables and wiring installed in ferrous conduit (RGS), ferrous intermediate metal conduit (IMC), ferrous electrical metallic tubing (EMT), ferrous cable trays, or ferrous wireways (except as prohibited by the NEC)? | If no, what percentage of ferrous materials is used? | ||||
| List any other support structures, such as PVC or flexible metal conduit (FMC). | ||||||
| 9.5. | Are all electronic signal conductors and cables installed in ferrous conduit (RGS), ferrous intermediate metal conduit (IMC), ferrous electrical metallic tubing (EMT), ferrous cable trays, or ferrous wireways (except as prohibited by the NEC)? | If no, what percentage of ferrous materials is used? % | ||||
| List any other support structures, such as PVC or flexible metal conduit (FMC). | ||||||
| 9.6. | If any flexible metal conduits and/or liquid- tight flexible metal conduits have an external bonding jumper, is it properly bonded? | |||||
| Note: This correspond to legacy systems. | ||||||
| 9.7. | Are all flexible metal conduits and liquid- tight flexible metal conduits less than 6 ft. in length? | If not, what percentage exceeds 6 ft.? | ||||
| % | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 9.8. | Are all flexible metal conduits and liquid- tight flexible metal conduits in proper condition, properly terminated and seated? | Indicate the size and location of non-compliant flexible metal cables: | ||||
| See 1217F or later for more information | ||||||
| 9.9. | Are MC cables and liquid-tight MC cables properly installed in metallic cable tray? | Indicate the size and location of non-compliant MC cables: | ||||
| See 1217F or later for more information | ||||||
| 10. | General Electronic Equipment Grounding | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Main Ground Plate (MGP) | ||||||
| 10.1. | Does the NASEB have a MGP? If so, where? | Location: | ||||
| 10.2. | Is MGP cover properly labeled and color coded with green stripes? | |||||
| 10.3. | Is the dimension of the MGP reasonably sized for the number of connections terminated? | |||||
| Note: Verify no overcrowded connections, All connections should be on the same side of the plate. | ||||||
| 10.4. | Is MGP connected to EES with a 500 MCM conductor? | |||||
| 10.5. | Is the 500 MCM conductor in #10.4 color coded with green/red stripes? | |||||
| 10.6. | Is the 500 MCM conductor connected to the MGP using UL listed hydraulically crimped 2-bolt-hole style terminal lugs or exothermic welds? Refer to Figure A-7 and record any deviations from the order of assembly shown. | |||||
| Main Ground Plate below the Antenna Tower (radar) | ||||||
| 10.7. | If there an electronic/electrical equipment or room right below a Radar, if so, how is it ground it? | |||||
| See radar standard drawing for the type of radar. | ||||||
| 10.8. | Show on the drawings grounding the placement of the plates and the general routing of the cables. | |||||
| 10.9. | What are the sizes of these cables? | List cable sizes. | ||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 10.10. | Describe connections to this main ground plate at this location level. Refer to Figure | Exothermic weld/two-hole lugs with concentric hydraulic crimp, or other mechanical type? | ||||
| A-7 and record any deviations from the order of assembly shown. | ||||||
| Supplemental Ground Plate (SGP) | ||||||
| 10.11. | Does the NASEB have a SGP at the opposite side of the building from the MGP? | |||||
| Where? | ||||||
| 10.12. | Is the SGP cover properly labeled and color coded green with orange stripes? | |||||
| 10.13. | Is the dimension of the SPG reasonably sized for the number of connections terminated? | |||||
| Note: Verify no overcrowded connections, All connections should be on the same side of the plate. | ||||||
| 10.14. | Is supplemental ground plate connected to EES with a 500 MCM conductor? | |||||
| 10.15. | Is the 500 MCM conductor color coded with | |||||
| green/red stripes? | ||||||
| 10.16. | Is the 500 MCM conductor connected to MGP using UL listed hydraulically crimped 2-bolt-hole style terminal lugs or exothermic welds? Refer to Figure A-7 and record any deviations from the order of assembly shown. | |||||
| 10.17. | Is the 500 MCM conductor connecting SGP to EES shorter/longer by 30% than the one from the MGP to EES? | |||||
| Engine Generator (EG) Grounding | ||||||
| 10.18. | Is the EG a separately derived source (does the ATS switch the neutral or is it a 480 system with no neutral)? | |||||
| 10.19. | Is there a grounding electrode conductor (GEC) installed from the neutral bus to structural steel and/or to the EES? | |||||
| 10.20. | Is the grounding electrode conductor properly sized per NEC 70 Table 250.66 and at least a minimum 2 AWG? | |||||
| 10.21. | Is there a ground to neutral bonding jumper installed and sized per NEC 70 Table 250.66 and at least a minimum 2 AWG? | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 10.22. | Is the EG fossil fuel exhaust stack bonded to the nearest lightning protection system or directly to the EES? | |||||
| 10.23. | Is the fuel tank vent piping bonded to the nearest lightning protection system or directly to the EES? | |||||
| 11. | Electronic Grounding in Equipment Room | Please make copies of this page. Use one sheet for each equipment room. | ||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| LOCATION: ROOM #/NAME: | ||||||
| General Electronic Equipment Grounding | ||||||
| 11.1. | If cable trays are not UL listed as electrically continuous, then are the sections of cable trays bonded with 6 AWG bonding jumper at minimum? | |||||
| 11.2. | In the electronic equipment room, are both ends of the cable tray bonded to the MPG, SRGG, or SRGP? | |||||
| Note: Multipoint grounding system (MPG) Signal Reference ground Grid (SRGG) Signal Reference ground Plane (SRGP) | ||||||
| 11.3. | In the electronic equipment room, is cable tray system bonded to the SRGG or SRGP at 25 ft. intervals maximum? | |||||
| Note: Per FAA-STD-019F, Paragraph 4.7.3.2 | ||||||
| 11.4. | In the electronic equipment room, is cable tray system bonded to the MPG at 50 ft. intervals maximum? | |||||
| Note: Per FAA-STD-019F, Paragraph 4.7.4.2 | ||||||
| 11.5. | Is telco/3rd party equipment properly grounded to the facility ground system? | |||||
| Multipoint Ground System (MPG) | ||||||
| 11.6. | Does an MPG system exist in the facility? | |||||
| 11.7. | Describe physical characteristics of MPG plates/bus (material, size, thickness). | |||||
| 11.8. | Do the bonding connections follow the configuration shown in Figure A-7? Refer to the figure and record any deviations from the order of assembly shown. | |||||
| 11.9. | Are the MPG plates/buses clearly labeled and color coded with green/orange stripes? | |||||
| 11.10. | Are the conductors between plates and buses at least 4/0 AWG insulated? | |||||
| 11.11. | Are these MPG conductors color coded with green/orange stripes at each end and at every 3 ft. interval? | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 11.12. | To identify origination and destination points, are the conductors labeled at both ends where cables pass between areas physically separated by walls? | |||||
| 11.13. | Is the MPG system bonded to the Main Ground Plate and to the Supplemental Ground Plate with 4/0 AWG conductor minimum? | |||||
| 11.14. | Do all MPG plates have at least two verifiable connections to the EES, that is, are all MPG plates not single ended? | |||||
| 11.15. | In general, how many connections are there to each MPG plate? | # of connections: | ||||
| 11.16. | Is the dimension of the MPG reasonably sized for the number of connections terminated? | |||||
| Note: Verify no overcrowded connections, All connections should be on the same side of the plate. | ||||||
| 11.17. | Are the MPG plates distributed in such manner to allow the shortest possible connections (less than 12 ft.) between the equipment and the MPG plate? | |||||
| Signal Reference Planes (SRGG & SRGP) | ||||||
| 11.18. | Does an SRGG exist in the facility? | |||||
| 11.19. | Do the grids consist of 2 inch wide copper strips, 26 gauge or thicker, arranged in a 2 ft. by 2 ft. grid and welded at each grid intersection? | |||||
| 11.20. | Does the perimeter of the SRGG extend to within 6 inches from the wall/edge of the raised floor/dropped ceiling area? | |||||
| 11.21. | Is the SRGG bonded to the raised floor every 6 ft. with bare conductor? | |||||
| 11.22. | Is a 4/0 AWG cable routed around the perimeter of the SRGG within 6 ft. of the grid perimeter? | |||||
| 11.23. | Are the copper strips of the SRGG bonded to the above 4/0 AWG perimeter cable with 4 AWG bare copper conductors at every intersection? | |||||
| 11.24. | Is the 4/0 AWG perimeter cable bonded to the EES with a minimum of four 4/0 AWG conductors spaced as widely as practical? | |||||
| 11.25. | Is building structural steel within 6 ft. from the SRGG bonded with a 4/0 AWG conductor? | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 11.26. | Are conduits, wireways, pipes, cable trays, and other metallic elements that penetrate the area bonded to the SRGG at the entry point and at an interval of 25 ft. for their entire length in the area? | |||||
| 11.27. | Are the bonds in item 11.25 made with a 4 AWG conductor at minimum? | |||||
| 11.28. | Does an SRGP exist in the facility? | |||||
| 11.29. | Has SRGP design and installation been approved by the OPR of FAA-STD-019? | |||||
| 11.30. | Does the SRGP consist of 24-gauge copper sheet at minimum? | |||||
| 11.31. | Is the SRGP bonded to the EES with a minimum of four 4/0 AWG conductors spaced as widely as practical? | |||||
| 11.32. | Is building structural steel within 6 ft. from SRGP bonded with a 4/0 AWG conductor? | |||||
| 11.33. | Are conduits, wireways, pipes, cable trays, and other metallic elements that penetrate the area bonded to the SRGP at the entry point and at an interval of 25 ft. for their entire length in the area? | |||||
| 11.34. | Are the bonds in item 11.32 made with a 4 AWG conductor at minimum? | |||||
| Single Point Ground System (SPG) | ||||||
| 11.35. | Does a SPG system exist in the facility? | |||||
| 11.36. | Is the SPG system terminated at the Main Ground Plate or at the EES? (Only one connection to the Main Ground Plate/EES shall be allowed for the SPG.) | |||||
| 11.37. | If terminated at the Main Ground Plate, is SPG system bonded to Main Ground Plate with 4/0 AWG conductor minimum? | |||||
| 11.38. | If terminated at the EES, is the SPG system bonded to the EES with 500 MCM conductor minimum? | |||||
| 11.39. | Is separation between the SPG system and MPG system maintained throughout the facility (with the exception being at the MGP or EES)? | |||||
| 11.40. | Describe the physical characteristics of the SPG plates/buses (material, length, width, thickness). | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 11.41. | Do the bonding connections to the plates follow the configuration shown in Figure A- 7? Refer to the figure and record any deviations from the order of assembly shown. | |||||
| 11.42. | Are the SPG plates/buses clearly labeled and color coded with green/yellow stripes? | |||||
| 11.43. | Are the conductors between plates and buses at least 4/0 AWG insulated? | |||||
| 11.44. | Are these SPG conductors color coded with green/yellow stripes at each end and at every 3 ft. interval? | |||||
| 11.45. | To identify origination and destination points, are the conductors labeled at both ends where cables pass between areas physically separated by walls? | |||||
| Electronic Equipment Bonding | ||||||
| 11.46. | Are all cabinets bonded to the MPG? | |||||
| Note: cabinet refers to enclosures, racks, cases that house electronic equipment. | ||||||
| 11.47. | Are cabinets bonded with two conductors? | Note conductor size, connection type, UL rating (e.g., THHN), etc. | ||||
| Note: At least one conductor to outer surface and one to the inside bus bar. | ||||||
| 11.48. | Do the two paths to the MPG vary by 20% to 30% in length? | |||||
| 11.49. | Do all cabinets have interior bus bars bonded to the MPG? | |||||
| 11.50. | How many cabinets do not have bus bars? | |||||
| # of cabinets: List locations: | ||||||
| 11.51. | What percentage of cabinets does not have | |||||
| bus bars? | Percentage of cabinets: % List locations: | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 11.52. | Is the bus bar connected to the MPG by at least a 2 AWG conductor? | |||||
| 11.53. | Are all components in the cabinet bonded to the interior bus bar? | |||||
| 11.54. | How many components are not bonded to the bus bars? | # of components not bonded to bus bars: | ||||
| List locations: | ||||||
| 11.55. | What percentage of components is NOT | Percentage of components not bonded to bus | ||||
| bonded to bus bars? | bars: % List locations: | |||||
| 12. | Bulkhead Plates | Please make copies of this page. Use one sheet for each bulkhead plate. | ||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| BULKHEAD PLATE # | ||||||
| 12.1. | Describe location of the bulkhead plate. | |||||
| 12.2. | Note the bulkhead designation/label. | |||||
| 12.3. | Is this bulkhead located at a location where there is a 90 degree vertical-to-horizontal transition (i.e. near the tower base) for waveguide, axial cables, and conduits? | IF NO, skip to #12.6. | ||||
| 12.4. | If #12.3 is yes, is the grounding kit installed above the 90 degree transition bend? | |||||
| 12.5. | If #12.3 is yes, is the kit installed approximately 2 ft. above the 90 degree transition bend? | |||||
| 12.6. | Is grounding kit connected to the EES with 4/0 AWG insulated conductors? | |||||
| Note cable size: | ||||||
| 12.7. | Is conductor in #12.1 bonded to bulkhead plate using two-hole bolted lugs? Refer to Figure A-7 and record any deviations from the order of assembly shown. | |||||
| Note connector type: | ||||||
| 12.8. | Is crimp on cable concentric hydraulic type? | Note crimp type: | ||||
| Note quality of the connection: | ||||||
| 12.9. | Are all cables/conduits entering facility in vicinity bonded to this bulkhead? | |||||
| 12.10. | How many axial cables are bonded to this bulkhead plate? | # of axial cables bonded to plate: | ||||
| # of axial cables NOT bonded to plate: | ||||||
| 12.11. | How many metal conduits are bonded to this bulkhead plate? | # of conduits bonded to this plate: | ||||
| # of conduits NOT bonded to this plate: | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 12.12. | Do the axial cables have center line surge protective devices? | |||||
| Manufacturer: Model #: Other comments: | ||||||
| 13. Separately Derived Source Systems | Please make copies of this page. Use one sheet for each separately derived source system. | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| SEPARATELY DERIVED SOURCE SYSTEM # | ||||||
| 13.1. | Describe the location of the separately derived source system. | |||||
| 13.2. | Note the separately derived source system | |||||
| designation/label. | ||||||
| 13.3. | Is this separately derived source system grounded in accordance with the requirements of NEC Article 250 at the first downstream disconnecting means or overcurrent device? | |||||
| 13.4. | Is a SPD installed on the load side of separately derived power source that feeds NAS electronic equipment? | |||||
| 13.5. | Is the grounding electrode conductor (GEC) connected directly to the EES or the nearest effectively grounded structural steel member? | |||||
| 13.6. | Is the GEC properly sized per NEC Table 250.66? | |||||
| 13.7. | Is there a ground to neutral bond (system bonding jumper) located at the first disconnecting means or overcurrent device immediately after the transformer (or separately derived source system)? | |||||
| 13.8. | Is system bonding jumper and GEC located at first downstream system disconnecting means or overcurrent device? | |||||
| 13.9. | If this separately derived system serves NAS critical/essential services, is there an additional grounding electrode conductor terminated to EES? | |||||
| 14. List of Surge Protective Devices for Electrical Systems | Please make copies of this page to list additional surge protective devices for electrical systems. | |||||
| # | Floor# | Room# | SPD Label | Manufacturer | Model# | System Voltage |
| 15. Facility Condition Status | ||||||
| For the facility that you survey, assign a condition status (red, yellow, or green) by writing an “x” or check mark in the appropriate column for each section. The status should be based on the team’s observations and notations in those sections of the checklist. | ||||||
| CONDITION STATUS | ||||||
| CHECKLIST SECTION | RED | YELLOW | GREEN | |||
| 4. Buildings and Equipment Integrated into the Primary Facility Lightning Protection | ||||||
| 5. Antenna Tower Site Lightning Protection | ||||||
| 6. Earth Electrode System (EES) and Fence Grounding | ||||||
| 7. Service Entrance Grounding | ||||||
| 8. Surge Protective Devices (SPD) | ||||||
| 9. Power Distribution and Electrical Grounding | ||||||
| 10. General Electronic Equipment Grounding | ||||||
| 11. Electronic Grounding in Equipment Room | ||||||
| 12. Bulkhead Plates |
Lrge Twr wo Radome Checklist
| Large Tower without Radome |
| Note: The below section addresses large towers that do not have radomes, e.g., radar towers not requiring radomes for |
environmental protection. Skip this section if NOT a large tower.
| Air Terminals | Y | N | N/A | |||
| 5.47. | Ensure you have the appropriate site specific and program standard construction drawings. | |||||
| 5.48. | Is the condition of the air terminals good? (e.g., not broken, bent, loose, missing, etc.) | |||||
| 5.49. | Are air terminals’ dimensions correct? | Material: Diameter: Length: | ||||
| Note: (1) Copper: Minimum 12 in. high, ½ in. diameter, or (2) Aluminum: Minimum 12 in. high, 5/8 in. diameter. | ||||||
| 5.50. | If the air terminal is installed with a riser, what is the total height of air terminal plus riser? | Total Height: | ||||
| 5.51. | Are the tips of the air terminals rounded? If not, describe (e.g., pointed, ball, splines, etc.) | |||||
| 5.52. | Does each air terminal have a minimum of two paths to the EES? | |||||
| 5.53. | Are the horizontal to vertical lightning conductor transitions installed as per the drawing at right? | |||||
| 5.54. | Is there a perimeter lightning conductor around the platform of the tower? | |||||
| If so, is the condition of the perimeter conductor that forms a loop around the top platform of the tower good? (E.g., not broken, good connections and bonding, not unfastened, corroded, sharp sweep, etc.) | ||||||
| Note: Legacy installations may have the perimeter conductor mounted on the floor of the tower platform. If so, make a recommendation in the survey report to install a perimeter conductor on the top of the platform handrail. | ||||||
| Down Conductors and Fittings | Y | N | N/A | |||
| 5.55. | Provide a general description of the tower site. (Height, area, number of legs, leg shape L-angular or tubular, material, etc.) | |||||
| 5.56. | Is there a down conductor at each leg of the tower? | |||||
| 5.57. | Is the condition of the down conductors good? (E.g., not broken, bonding connections good, nothing unfastened, missing, sharp turn, etc.) | |||||
| 5.58. | Are the down conductors made of copper and at minimum classified as Class II as defined by NFPA 780? | |||||
| Note: Tinned copper can be confused with aluminum. If is questionable investigate further. (scrape material) | ||||||
| 5.59. | Are the down conductors constructed either with rope lay or braid? | Describe the kind of cable used (rope lay, braided, twisted, other?) | ||||
| 5.60. | Do external down conductor turns and bends follow a radius of at least 8 inches? | |||||
| 5.61. | Are the down conductors secured approximately every 3 ft? | |||||
| 5.62. | Is the tower height equal to or greater than 60 feet from the base to top platform? | |||||
| If so, are potential equalization loops installed at intermediate tower heights, evenly spaced and no more than 60 ft. apart (measured from the tower platform)? | ||||||
| 5.63. | Does the external down conductor maintain a downward course to the EES? | |||||
| 5.64. | Are the down conductors routed away from signal/power conductors to the maximum possible extent (lateral separation)? | Separation distance: Parallel/perpendicular/crossing: | ||||
| 5.65. | Are the down conductors routed down the outer side of each tower leg whenever possible? | |||||
| 5.66. | Are the down conductors exothermically welded each stacked section of the tower? If so, what is the condition of this bonding connection? (check for corrosion or other impurities) | |||||
| 5.67. | At the grade level, is each down conductor exothermically welded to the base of each tower leg? | |||||
| 5.68. | Is each tower leg at the base exothermically welded to a bare 4/0 copper conductor before entering the ground and then exothermically welded to the EES? | |||||
| 5.69. | Describe the external down conductor’s fittings (exothermic, double bolted/single, weld, etc.) | |||||
| 5.70. | Is the down conductor bonded to each section of the tower? If so, what is the condition of this bonding connection? (check for corrosion or other impurities) | |||||
| 5.71. | Are all fittings the same material of conductors, or compatible with conductors? If not, is a bimetallic connector used to transition from aluminum to copper conductors? | Identify what is needed to ensure compliance: | ||||
| Note: FAA-STD-019e: Copper and bronze fittings shall be used with copper conductors. Aluminum fittings may only be used with aluminum conductors. Bolt pressure connection recommended. Crimp-type fittings are not allowed. | ||||||
| Metallic Objects Near Down Conductors | Y | N | N/A | |||
| 5.72. | Are all exterior metal objects within 6 ft of a down conductor properly bonded to the down conductor? | |||||
| Material: Cable type: Cable size: # of strands: Connection type (welded, single/double | ||||||
| 5.73. | Are horizontal metal transitions (stairwell walkways, platforms, landings, structures, etc.) bonded to structural steel and/or rebar? | |||||
| 5.74 | Are bonding jumpers a minimum 2 AWG copper conductors where required? | |||||
| Auxiliary Antennas and Other Metallic Objects Mounted on the Tower Structure | Y | N | N/A | |||
| 5.75. | Consisting of masts for microwave dishes, parrot antennas, Yagis, obstruction lights, etc. | |||||
| Are all exterior metal masts on the tower properly bonded to the lightning protection system? | ||||||
| Guards | Y | N | N/A | |||
| 5.76. | Are the guards made of PVC material? | |||||
| 5.77. | Is the 4/0 AWG conductor routed through a 1-in. PVC conduit around the foundation concrete pier to 12 in. height? | |||||
| Grounding Bulkhead Kit | Y | N | N/A | |||
| 6. Earth Electrode System (EES) and Fence Grounding | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Earth Electrode System | ||||||
| Note: There is an EES surrounding the NASEB buildings, EG buildings, and all towers. | ||||||
| 6.1. | In hazardous areas, where exothermic weld may not be used, are hydraulically crimped connections employed? | |||||
| 6.2. | Does the access well exist? | Number of access wells: | ||||
| 6.3. | Does the access well has a 12-in. minimum radius clearance from the center of the ground rod to the inside wall of the access well? | |||||
| If no, what is the space around the rod: | ||||||
| 6.4. | What is the condition of the connections? (e.g., secured, corroded, stacked, broken insulation damaged, dissimilar metals connections, etc.) | |||||
| 6.5. | Using 62% “Fall of Potential” method, does the earth electrode system measure 10 ohms or less or as required in the specification? | |||||
| NOTE: Test distance 5x the facility diameter or at least 150 ft away on undisturbed soil. Connect (P1/C1) to the outer point of the EES grid perimeter. | ||||||
| Gates and Fence Grounding | ||||||
| Note: Some facilities may have had LPGBS upgrades exceeding 019F (e.g., ARSR, TDWR, ASR, etc.). These sites should be maintained to their current level. | ||||||
| 6.6. | Are gates bonded to the adjacent posts? | |||||
| 6.7. | Are the gate connections made of insulated 4/0 AWG flexible (welding) copper conductors or copper straps (1 inch by 1/8 inch)? | |||||
| 6.8. | Is an exothermic weld-type connection used to bond the conductors/straps to the gates/posts? | If not, please describe the bonding method: | ||||
| 6.9. | Are the posts on each side of the gates bonded to the ground rod with 4/0 AWG bare copper conductor? | |||||
| 6.10. | Are both gate posts interconnected and bonded below ground with 4/0 AWG bare copper conductor? | Note: Verify using existing drawing. | ||||
| 6.11. | Is there a horizontal bare 6 AWG stranded tinned copper conductor threaded through the metal fric of the gate? | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 6.12. | At the perimeter fence, is a 6 AWG conductor mechanically bonded to the fence posts at intervals not greater than 40 ft.? | |||||
| Note: Exceeds FAA-019F. See title note. | ||||||
| 6.13. | Is there a buried 4/0 AWG bare copper conductor within 3 ft along and parallel to the fence and bonded to the posts every 40 ft to a ground rod? | |||||
| Note: Exceeds FAA-019F. See title note. | Per FAA-019F: Fence grounding composed of a ground rod adjacent to the fence post located at spacing intervals not greater than 100 ft along the perimeter fence line. Then fence post exothermically welded to each ground rod using a 4/0 AWG bare stranded copper conductor. | |||||
| 6.14. | Are there a minimum of four 4/0 AWG connections installed between the fence EES and facility EES? | |||||
| Note: Exceeds FAA-019F. See title note. | ||||||
| 6.15. | Is there an adjoining non-FAA-owned fence connected to the existing FAA perimeter fence? If so, is it electrically isolated? | |||||
| 7. Service Entrance Grounding | ||||||
| Please also fill in surge protective device information in Section 8, starting on page 41. | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Electrical Service | ||||||
| Caution: This will be a visual inspection due to potentially live circuit hazards. Note any anomalies for later investigation. You may need to open electrical panel covers. This will need to be coordinated with the site's NFPA 70E ops electrical qualified person. | ||||||
| 7.1. | Where is the location of the electrical service entrance? | |||||
| 7.2. | Is the neutral conductor grounded at the utility service transformer? If this grounding connection cannot be verified during visual inspection (e.g., nonaccessible pad mounted), what other information on this connection is available? Explain. | |||||
| 7.3. | Where applicable, is the NEC neutral (white) grounded at the main service disconnecting means? | |||||
| Note: For example, ASR-11service is 480V/3PH/3W. There is no white wire running out of the disconnect into the facility. | ||||||
| 7.4. | Is the grounding electrode conductor properly terminated at the service disconnecting means neutral bus? | |||||
| (e.g., secured, corroded, stacked, broken insulation damaged, etc.) | ||||||
| 7.5. | Is the grounding electrode conductor properly sized? | |||||
| 7.6. | Is the service entrance conduit grounded at the service entrance ground bus? | |||||
| 7.7. | Is the service disconnecting means housing grounded at ground bus? | |||||
| 7.8. | Is the ground bus properly bonded to the neutral bus in the service disconnect enclosure? (main bonding jumper) | |||||
| 7.9. | Are load-side NEC neutral conductors grounded only at the service disconnecting means or at the source of a separately derived system? | |||||
| NOTE: Neutral must not be grounded at any electrical or electronic equipment, raceways, switches, panel boards, or receptacles, etc. | ||||||
| Signal/Control Cables | ||||||
| 7.10. | At how many service entrance locations does each facility have from field/signal/control cable? | |||||
| # of locations: | ||||||
| 7.11. | Where are the locations of the service entrances in #7.10? | |||||
| Highlight these markup location on the drawings. | ||||||
| 7.12. | Roughly how many field/signal/control | |||||
| cables enter the facility? | # of signals: | |||||
| 7.13. | Are there surge protective devices installed for each field/signal/control cable that enters the facility? | |||||
| 7.14. | Are all field cable overall shields grounded at the service entrance? | |||||
| 7.15. | How are field cable shields grounded? | |||||
| 7.16. | Are all cable pair shields/drains grounded at the service entrance? | |||||
| 7.17. | How many cable pair shields are not | # of cables not properly grounded: Calculate percentage: % | ||||
| properly grounded? | Locations: | |||||
| 7.18. | How many cables do not have a surge | # of cables that do not have a surge protective | ||||
| protective device? | device: | |||||
| Calculate percentage: % | ||||||
| Locations: | ||||||
| 7.19. | Are the overhead or underground waveguide, axial cable, and/or conduits feeding into the facility bonded to a bulkhead ground plate? | |||||
| If not, explain how they are grounded. | ||||||
| 8. Surge Protective Devices (SPD) | ||||||
| Also refer to Section 14 on page 59 to record detailed information on each SPD inspected during the site survey. | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Power SPD | ||||||
| Caution: This will be a visual inspection due to potentially live circuit hazards. You may need to open electrical panel covers. This will need to be coordinated with the site's NFPA 70E ops electrical qualified person. | ||||||
| 8.1. | Is there a SPD installed at the service disconnecting means? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.2. | If #8.1 is yes, is the SPD installed at the load side of the service disconnecting means? | |||||
| 8.3. | Is there a SPD installed at any other facility penetration point? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.4. | Is there a SPD installed between the load side of the EG transfer switch and the first feeder panel? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.5. | Is the SPD installed within 12 inches to the service disconnecting means/panel? | |||||
| Distance from SPD to connection point: | ||||||
| 8.6. | Are the connections between terminals using the most direct path without any sharp bend, loop, and kinks? | |||||
| 8.7. | Does the SPD ground conductor match or exceed the size of the grounding electrode conductor? | |||||
| 8.8. | Is the SPD enclosure bonded to the SPD’s ground terminal? | |||||
| 8.9. | Are phase, neutral and equipment grounding conductors properly connected to the corresponding terminals on the SPD? | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 8.10. | Is the conduit connecting the SPD enclosure to the panel sealed with UL-listed, non- flammable material to prevent soot from entering the panel? | |||||
| Signal and Data Lines SPD, including Axial Lines | ||||||
| 8.11. | Are SPDs installed on signal/data lines at the facility entrance? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.12. | For telco/3rd party lines, are SPDs installed on signal/data lines at the point where the lines transfer to FAA control? | |||||
| 8.13. | Is the ground bus or bulkhead plate for the signal lines SPD connected to the EES? | Note cable size, connection type, cable type, path, SPD manufacturer, type, rating, etc. | ||||
| 8.14. | Is the ground bus conductor or bulkhead conductor running to the EES color coded green with red strips? | Note: Provide cable size, connection type, cable type, path, etc. | ||||
| 9. | Power Distribution and Electrical Grounding | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Separately Derived Source System | ||||||
| 9.1. | See Section 13. | |||||
| NOTE: Use one sheet for each separately derived source system surveyed. | ||||||
| Electrical Grounding | ||||||
| 9.2. | Where isolated ground receptacles are used to reduce electrical noise, are they identified with an orange color on the face of the receptacle? | |||||
| 9.3. | Where used, are isolated ground receptacles (question #9.2) installed in accordance with the requirements of the National Electrical Code? | |||||
| Electrical Support Structures | ||||||
| 9.4. | Are all electrical single conductors, cables and wiring installed in ferrous conduit (RGS), ferrous intermediate metal conduit (IMC), ferrous electrical metallic tubing (EMT), ferrous cable trays, or ferrous wireways (except as prohibited by the NEC)? | If no, what percentage of ferrous materials is used? | ||||
| List any other support structures, such as PVC or flexible metal conduit (FMC). | ||||||
| 9.5. | Are all electronic signal conductors and cables installed in ferrous conduit (RGS), ferrous intermediate metal conduit (IMC), ferrous electrical metallic tubing (EMT), ferrous cable trays, or ferrous wireways (except as prohibited by the NEC)? | If no, what percentage of ferrous materials is used? % | ||||
| List any other support structures, such as PVC or flexible metal conduit (FMC). | ||||||
| 9.6. | If any flexible metal conduits and/or liquid- tight flexible metal conduits have an external bonding jumper, is it properly bonded? | |||||
| Note: This correspond to legacy systems. | ||||||
| 9.7. | Are all flexible metal conduits and liquid- tight flexible metal conduits less than 6 ft. in length? | If not, what percentage exceeds 6 ft.? | ||||
| % | ||||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 9.8. | Are all flexible metal conduits and liquid- tight flexible metal conduits in proper condition, properly terminated and seated? | Indicate the size and location of non-compliant flexible metal cables: | ||||
| See 1217F or later for more information | ||||||
| 9.9. | Are MC cables and liquid-tight MC cables properly installed in metallic cable tray? | Indicate the size and location of non-compliant MC cables: | ||||
| See 1217F or later for more information | ||||||
| 10. | General Electronic Equipment Grounding | |||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| Main Ground Plate (MGP) | ||||||
| 10.1. | Does the NASEB have a MGP? If so, where? | Location: | ||||
| 10.2. | Is MGP cover properly labeled and color coded with green stripes? | |||||
| 10.3. | Is the dimension of the MGP reasonably sized for the number of connections terminated? | |||||
| Note: Verify no overcrowded connections, All connections should be on the same side of the plate. | ||||||
| 10.4. | Is MGP connected to EES with a 500 MCM conductor? | |||||
| 10.5. | Is the 500 MCM conductor in #10.4 color coded with green/red stripes? | |||||
| 10.6. | Is the 500 MCM conductor connected to the MGP using UL listed hydraulically crimped 2-bolt-hole style terminal lugs or exothermic welds? Refer to Figure A-7 and record any deviations from the order of assembly shown. | |||||
| Main Ground Plate below the Antenna Tower (radar) | ||||||
| 10.7. | If there an electronic/electrical equipment or room right below a Radar, if so, how is it ground it? | |||||
| See radar standard drawing for the type of radar. | ||||||
| 10.8. | Show on the drawings grounding the placement of the plates and the general routing of the cables. | |||||
| 10.9. | What are the sizes of these cables? | List cable sizes. | ||||
| # | Description | Y | N | N/A | Findings/Recommendations | |
| 10.10. | Describe connections to this main ground plate at this location level. Refer to Figure | Exothermic weld/two-hole lugs with concentric hydraulic crimp, or other mechanical type? | ||||
| A-7 and record any deviations from the order of assembly shown. | ||||||
| Supplemental Ground Plate (SGP) | ||||||
| 10.11. | Does the NASEB have a SGP at the opposite side of the building from the MGP? | |||||
| Where? | ||||||
| 10.12. | Is the SGP cover properly labeled and color coded green with orange stripes? | |||||
| 10.13. | Is the dimension of the SPG reasonably sized for the number of connections terminated? | |||||
| Note: Verify no overcrowded connections, All connections should be on the same side of the plate. | ||||||
| 10.14. | Is supplemental ground plate connected to EES with a 500 MCM conductor? | |||||
| 10.15. | Is the 500 MCM conductor color coded with | |||||
| green/red stripes? |
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