B09_Attach_3_2012(b)Field_Offices_RI_CASHE_Final_Report_06-2012_0001.pdf
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- RI CASHE - GUN SITE PEAK SITE INSTALL
- Solicitation number
- 140L1224Q0009
About this file
This document summarizes findings from a Radio Communications Site Assessment and Hazard Evaluation (RI-CASHE) report for the Gunsight Peak radio site. The report identifies deficiencies in areas including building design and equipment installation, external and internal grounding, interference minimization, power sources, and site design. Required corrections include installing shelter and tower ground rings, properly grounding antennas and other metallic structures, upgrading electrical service and panels, implementing cable management practices, and restricting public access. The related solicitation seeks purchase of RI-CASHE project services to perform installation work at the Gunsight Peak site to remedy the deficiencies identified in the assessment report. The solicitation was issued by the Department of the Interior Bureau of Land Management California Region.
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Section 4.2
REDDING FIELD OFFICE
355 Hemsted Drive Redding, California 96002
530-224-2100
Gunsight Peak
41° 44' 16.0" N 122° 22' 00.0" W
Assessment Date June 8, 2012
DRAFT FINAL RI CASHE REPORT - FOR OFFICIAL USE ONLY
Arcata, Redding, and Ukiah Field Offices Assessment Period: June 4-8, 2012
Report Date: November 29, 2012 Gunsight Peak
COMMUNICATION SITE BUILDING DESIGN AND INSTALLATION – BLDG
Finding Number: BLDG-12-001
Finding: The shelter is not properly sealed at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The BLM is a cooperator in the USDA Forest Service-owned shelter. The ceiling is water damaged and warped, evidence of heavy amounts of water entering the shelter. (3.13 E) Also, the RF cable entry, vents, and other openings are not properly sealed and weatherproofed. (3.13 AC)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Sealing Building and Shelters
Recommendation(s): Contact USDA Forest Service to do the following: A) Seal any openings including the cable entry ports and vents; and B) Repair any holes or leaks on the roof and ceiling.
Driving Reference(s): Motorola R56 Standard 3.2 – definitions of communications equipment sites Motorola R56 Standard 3.3 – building/shelter design Motorola R56 Standard 3.7.2 – sealing of buildings and shelters
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Facility (Checklist items 3.13)
Water Damaged Ceiling Warped Ceiling Water Damaged Ceiling
Report Date: November 29, 2012 Gunsight Peak
COMMUNICATION SITE BUILDING DESIGN AND INSTALLATION – BLDG
Finding Number: BLDG-12-002
Finding: The shelter is not equipped with adequate environmental controls at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The BLM is a cooperator in the USDA Forest Service-owned shelter. The shelter has commercial power and is not equipped with a heating, ventilation, and air-conditioning (HVAC) system. It has a wall vent behind the door that does not provide adequate ventilation or temperature control inside the shelter. (3.14 A)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Temperature Requirements Exhaust Fan and Intake Vent Heating Ventilation and Air Conditioning
Recommendation(s): Contact the USDA Forest Service and request that a thermostatic control system capable of activating the motorized louvers, fans, and heater be installed as appropriate.
Driving Reference(s): Motorola R56 Standard 3.8.1 – HVAC design considerations
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Facility (Checklist item 3.14)
West Wall of Shelter Exterior View of Air Vent Interior View of Air Vent
Report Date: November 29, 2012 Gunsight Peak
COMMUNICATION SITE BUILDING DESIGN AND INSTALLATION – BLDG
Finding Number: BLDG-12-003
Finding: Interior lighting is not protected at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 4
Discussion: The BLM is a cooperator at the USDA Forest Service-owned shelter. The incandescent light fixtures in the shelter are not equipped with protective covers. (3.16 D)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Lighting - Protective Covers
Recommendation(s): Contact the USDA Forest Service and request protective covers be installed on the light fixtures.
Driving Reference(s): Motorola R56 Standard 3.11 – lighting
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Facility (Checklist item 3.16)
Light Fixture with No Protective Cover
Light Fixtures with No Protective Covers
Light Fixture with No Protective Cover
Report Date: November 29, 2012 Gunsight Peak
COMMUNICATION SITE BUILDING DESIGN AND INSTALLATION – BLDG
Finding Number: BLDG-12-004
Finding: Exterior compound lighting is not provided for safe access and security at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The BLM is a cooperator at the USDA Forest Service-owned shelter. Exterior compound lighting is not provided for safe access and security at the site. (3.17 A)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Lighting - Exterior Lighting - Exterior Fixtures Lighting - Exterior Fixture Location
Recommendation(s): Contact the USDA Forest Service and request them to install exterior lighting in a NEMA Type-3 enclosure with light emitting diodes.
Driving Reference(s): Motorola R56 Standard 3.11.4 – exterior lighting
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Facility (Checklist item 3.17)
Radio Site Site with No Exterior Lighting
Report Date: November 29, 2012 Gunsight Peak
COMMUNICATION SITE BUILDING DESIGN AND INSTALLATION – BLDG
Finding Number: BLDG-12-005
Finding: Appropriate identification and safety warning signs are not posted at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: Access to the Gunsight Peak Radio Facility is not restricted and accessible to the public.
A USDA Forest Service-owned shelter houses the equipment. Batteries are not used at the site.
The following are required identification and warning signs that are not posted:
Authorized personnel only; (3.21 A) and Responsible entity identification. (3.21 B)
In addition, the radio frequency authorization (RFA) is not posted in the shelter. (7.1)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Signs - Responsible Entity Signs - Authorized Personnel Only Station License
Recommendation(s): A) Contact the USDA Forest Service and request that they post the site authorization and responsible entity for the site sign on the shelter door; and B) Post the current RFA in a conspicuous location or in a binder inside the equipment shelter.
Driving Reference(s): 47 CFR 73.1230 – posting of station license Motorola R56 Standard 3.15.1 – minimum required signage
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Facility
Radio Facility with No Fence or Signage
Radio Facility with No Fence or Signage
Report Date: November 29, 2012 Gunsight Peak
(Checklist items 3.21 and 7.1)
Report Date: November 29, 2012 Gunsight Peak
COMMUNICATION SITE BUILDING DESIGN AND INSTALLATION – BLDG
Finding Number: BLDG-12-006
Finding: Personnel entering or cleaning the USDA Forest Service-owned shelter are at risk of Hantavirus exposure at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 4
Discussion: BLM employees must work in the shelter that has rodent feces all over the floor. Sealing of holes in the shelter is discussed in a separate finding.
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Sealing Building and Shelters Rodent Infestation
Recommendation: A) If personnel must work in the shelter that is infested with mice for extended amounts of time, contract out for rodent feces cleanup operations first; or B) Designate a Respiratory Protection Program Administrator; C) Send the designee to training; D) Develop and implement the program, including providing training, fit tests, physicals, and pulmonary function tests for all personnel who need to wear APRs; E) Ensure that all employees that are potentially exposed to the Hantavirus wear a respirator with an N100 filter rating; and F) Ensure that dust and mist respirators are stored in covered plastic containers in an area that will protect them from dust and chemicals.
Driving Reference(s): 29 CFR 1910.134(a)(1) - engineering control measures 29 CFR 1910.134(c)(2) - voluntary use of respirators 29 CFR 1910.134(c)(2)(ii) - voluntary use exception 29 CFR 1910.134(c)(3) - program administration 29 CFR 1910.134(e) - medical evaluation 29 CFR 1910.134(e)(7) - additional medical evaluations 29 CFR 1910.134(f)(2) - annual fit test 29 CFR 1910.134(k) - training
Rodent Droppings in Shelter Rodent Poison Rodent Droppings in Shelter
Report Date: November 29, 2012 Gunsight Peak
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Facility (Checklist item 3.13)
Report Date: November 29, 2012 Gunsight Peak
EQUIPMENT INSTALLATION - EQUIP
Finding Number: EQUIP-12-001
Finding: The Gunsight Peak Radio Facility equipment racks and cabinets do not meet the minimal installation requirements.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: Radio equipment is installed in a 9-foot 6-inch wide, 14-foot long, 8-foot tall, USDA Forest Service-owned, concrete block shelter. The shelter is equipped with one BLM-owned equipment cabinet, and four cooperator owned equipment racks and cabinets. The radio site has a moment magnitude rating of 3. The following deficiencies are noted:
Each equipment rack and cabinet is not fastened to the floor with six anchor bolts as required in sites with a moment magnitude rating of 3; (8.3 G) Each equipment rack and cabinet is not braced to the ceiling as required in sites with a moment magnitude rating of 3; (8.3 J) and Each equipment rack and cabinet is not equipped with a rack ground bus (RGB) bar. Installation of cable runway is discussed in a separate finding. (8.3 K)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Equipment Rack and Cabinet Installation Seismic Design Considerations for Equipment Installation Equipment Rack and Cabinet Grounding
Recommendation(s): Contact USDA Forest Service to do the following: A) Fasten each rack and cabinet to the floor of the shelter using a minimum of six seismically rated concrete expansion anchors through the holes provided in the base of the racks and cabinets; B) Drill additional holes in the base of each equipment rack or cabinet as required; C) Consult with a professional engineer for site-specific design and attachment instructions to install seismic bracing between the top of equipment racks and cabinets and the ceiling; D) Fasten the top of each rack and cabinet to the ceiling using a ¼-inch steel wire rope attached to channel brackets (Unistrut® or equivalent) mounted on the ceiling above the equipment at a minimum; E) Install a horizontal, copper, rack ground bus bar at the top rear section of each rack and cabinet using 15-kV insulated standoffs and stainless steel hardware; F) Ground each rack ground bus bar to the master ground bus bar with a #2 AWG or coarser, green-jacketed, stranded, copper grounding
Base of Equipment Rack Not Properly Mounted
Top of Equipment Rack Not Properly Secured
Equipment Cabinet Not Equipped with RGB
Report Date: November 29, 2012 Gunsight Peak conductor; G) Route each grounding conductor through the cable runway; H) Secure each grounding conductor to the cable runway using nonmetallic fasteners in 24-inch increments; I) Bond each grounding conductor to the rack ground bus bar and master ground bus bar using UL467-listed, two-hole, irreversible crimp connectors and stainless steel hardware; J) Bond each equipment rack rail and cabinet chassis to the rack ground bus bar with a #6 AWG, green-jacketed, stranded, copper grounding conductor using UL467-listed, two-hole, irreversible crimp connectors and stainless steel hardware; and K) Apply a UL-listed, conductive, antioxidant agent between each mechanical grounding connection.
Driving Reference(s): Motorola R56 Standard 5.3.3 – rack ground bus bar Motorola R56 Standard 9.4 – seismic considerations Motorola R56 Standard 9.4.1 – general recommendations NEC Table 110.26 (A)(1) – working spaces
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 8.3)
Report Date: November 29, 2012 Gunsight Peak
EQUIPMENT INSTALLATION - EQUIP
Finding Number: EQUIP-12-002
Finding: Radio equipment installed in racks and cabinets are improperly mounted and/or grounded at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The BLM is a cooperator in the USDA Forest Service-owned concrete block shelter. The shelter is shared by four cooperators including the USDA Forest Service, Crawford Logging, and two unknown cooperators. The BLM radio equipment is installed in an equipment cabinet. The following deficiencies are noted:
The BLM-owned equipment utilizes an extension cord for a permanent electrical power connection.
The BLM radio power supply is connected to a six position power strip connected to an extension cord routed to a wall outlet on the south wall. The outlet directly beside the BLM cabinet on the west wall is powered and unused; (8.4 I) BLM-owned and cooperator-owned electronic equipment is not grounded. Installation of a rack ground bus bar in each equipment rack and cabinet is discussed in a separate finding; (8.4 K) One mounting screw is used to fasten the BLM-owned duplexer and two mounting screws are used to fasten radio system components where four screws in each unit are required; (8.5 B) The BLM-owned RF duplexer and isolator panel are not grounded. Installation of a rack ground bus bar in each equipment rack and cabinet is discussed in a separate finding; (8.5 C) Each cooperator-owned floor-mounted RF duplexer and filter is not fastened to the floor or wall with proper brackets and hardware; (8.5 D) and Each cooperator-owned floor-mounted duplexer and filter is not grounded. (8.5 E)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Cables and Wiring on Equipment Racks and Cabinets Equipment Installation in Racks and Cabinets Grounding Rack and Cabinet Mounted Equipment Extension Cords
Recommendation(s): Contact USDA Forest Service to do the following: A) Remove the extension cord used to power BLM-owned equipment; B) Plug the BLM equipment into the wall outlet next to the BLM
Extension Cord Powering BLM Radio Equipment
RF Duplexer Not Properly Mounted and Grounded
Improperly Mounted Equipment in Cabinet
Report Date: November 29, 2012 Gunsight Peak equipment cabinet; C) Label the electrical circuit on the electrical panel board and at the outlet location in case emergency shutoff is required; D) Ground each rack-mounted and cabinet-mounted electronic device to the rack ground bus bar with an individual #6 AWG or coarser, green-jacketed, stranded, copper grounding conductor; E) Bond grounding conductors to each device and the rack ground bus bar using a UL467-listed, single-hole, irreversible crimp connectors and stainless steel hardware; F) Fasten the duplexer and isolator panel to the equipment cabinet using four stainless steel screws for each component; G) Ground the duplexer and isolator panel to the rack ground bus bar with individual #6 AWG or coarser, green-jacketed, stranded, copper grounding conductors using UL467-listed, single-hole, irreversible crimp connectors and stainless steel hardware; H) Fasten each cooperator duplexer and filter to the floor using well-fitted or manufacturer provided brackets and stainless steel hardware; I) Ground each floor-mounted duplexer and filter to the master ground bus bar with a #2 AWG or coarser, green-jacketed, stranded, copper grounding conductor using UL467-listed, single-hole, irreversible crimp connectors and stainless steel hardware; and J) Apply a UL-listed, conductive, antioxidant agent between each mechanical grounding connection.
Driving Reference(s): 29 CFR 1910.305(g)(1)(iii) – flexible cords and cables Motorola R56 Standard 5.4.1 – general bonding requirements Motorola R56 Standard 6.2.9 – hardwiring equipment and dedicated receptacles Motorola R56 Standard 6.2.10 – receptacles Motorola R56 Standard 6.2.11 – receptacle strips Motorola R56 Standard 9.7 – equipment installation in racks or cabinets Motorola R56 Standard 9.9.1 – cabling requirements for equipment in racks Motorola R56 Standard 9.9.3.2 – cable separation and grouping Motorola R56 Standard 9.9.4 – alternating current power cabling
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist items 8.4 and 8.5)
Report Date: November 29, 2012 Gunsight Peak
EQUIPMENT INSTALLATION - EQUIP
Finding Number: EQUIP-12-003
Finding: The internal cable installations on the equipment racks do not meet most of the minimal installation requirements at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The BLM is a cooperator in the USDA Forest Service-owned concrete block shelter. The shelter is shared by four cooperators including USDA Forest Service, Crawford Logging, and two unknown cooperators. The BLM radio equipment is in an equipment cabinet. The following deficiencies are noted:
Each RF cable is not fastened to the equipment rack or cabinet in 24-inch increments; (8.6 A) and The BLM-owned RF cable has excess cable length that is coiled or unsupported. (8.6 F)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Cables and Wiring on Equipment Racks and Cabinets
Recommendation(s): Contact USDA Forest Service to do the following: A) Secure each RF cable directly to the equipment rack or cabinet rack rail in 24-inch increments; B) Maintain a minimum 2-inch separation between the RF cables, DC power wiring, and grounding conductors; C) Maintain a minimum 4-inch separation between other cable types; and D) Remove excess length from the RF cable by cutting the RF cable to length, leaving a six-inch service loop at each end, and install a replacement connector on the cut cable end.
Driving Reference(s): Motorola R56 Standard 9.9.1 – cabling requirements for equipment in racks and cabinets
Motorola R56 Standard 9.9.3.2 – cable separation and grouping within cable trays
Motorola R56 Standard 9.9.3.3 – securing cables within cable trays
BLM Radio with excess RF Cable
Cooperator Radio with Excess RF Cable
BLM Radio with Unsupported RF Cable
Report Date: November 29, 2012 Gunsight Peak
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 8.6)
Report Date: November 29, 2012 Gunsight Peak
EQUIPMENT INSTALLATION - EQUIP
Finding Number: EQUIP-12-004
Finding: The internal cable installations in the shelter do not meet minimal installation requirements at the Gunsight Peak Radio Facility.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: Radio equipment is installed in a USDA Forest Service-owned concrete block shelter equipped with two RF cable entrances. The shelter is equipped with BLM-owned RF cable and 11 cooperator-owned RF cables routed between the equipment and each RF cable entrance. The following deficiencies are noted:
The shelter is not equipped with a cable runway between the equipment racks and cabinets and the two RF cable entrances; (8.7 A) Each RF cable, horizontally installed between the equipment racks and cabinets and the RF cable entrances, is not fastened or supported in 24-inch increments; (8.7 B) and Vertically installed RF cables between the equipment racks and cabinets and each RF cable entrance are not compliantly installed. The vertically routed BLM RF cable is unsupported between the duplexer and the ceiling for approximately 7 feet. Cooperator's vertical RF cables are not supported between the equipment and the ceiling. (8.7 E)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Cable Runway Installation Cable Runway Clearance Grounding and Bonding Cable Runways Cable Management in Equipment Enclosures Cable Group Separation
Recommendation(s): Contact USDA Forest Service to do the following: A) Install multiple horizontal cable runway segments between each equipment rack and cabinet and each RF cable entrance to the shelter; B) Suspend each cable runway segment from the ceiling using threaded rod attached to channel brackets (Unistrut® or equivalent) mounted on the ceiling using expansion anchors; C) Ground the closest segment of the cable runway to the master ground bus bar with two #6 AWG or coarser, green-jacketed, stranded, copper grounding conductors; D) Bond each grounding conductor to the cable runway and master ground bus bar using UL467-listed, single-hole, irreversible, crimp connectors and through-
Shelter with No Cable Runway Improperly Supported RF Cables
Improperly Supported RF Cables
Report Date: November 29, 2012 Gunsight Peak bolted stainless steel hardware; E) Install a #6 AWG or coarser, green-jacketed, stranded, bonding jumper between each cable runway segment using UL467-listed, single-hole, irreversible, crimp connectors and through-bolted stainless steel hardware; F) Remove protective coating or paint from cable runway bonding surfaces and apply a UL-listed, conductive, antioxidant agent between each mechanical grounding connection; G) Reroute each RF cable installed between the equipment racks and cabinets and each RF cable entrance on to the horizontal cable runway; H) If necessary, replace RF cables installed between the equipment racks and cabinets with longer cables that are routed onto the horizontal cable runway; I) Secure each RF cable to the cable runway in 36-inch increments using nonmetallic cable fasteners; J) Reroute each RF cable installed between the equipment and the cable runway; K) Maintain the manufacturer recommended bend radius; L) Fasten each RF cable vertically up the wall to the cable runway in 36-inch increments using nonmetallic cable fasteners.
Driving Reference(s): Motorola R56 Standard 3.10 – cable trays Motorola R56 Standard 4.5.4 – methods to reduce corrosion Motorola R56 Standard 5.4 – connection methods for internal grounding system Motorola R56 Standard 5.5.1.5 – cable trays Motorola R56 Standard 9.9.3 – cabling requirements for cable trays, ladders
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Site (Checklist item 8.7)
Report Date: November 29, 2012 Gunsight Peak
EQUIPMENT INSTALLATION - EQUIP
Finding Number: EQUIP-12-005
Finding: Radio frequency cable surge protection devices are not installed or are improperly grounded at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: Radio equipment is installed in a USDA Forest Service-owned concrete block shelter equipped with two RF cable entrances. The shelter has one BLM-owned RF cable and 11 cooperator-owned RF cables routed between the equipment and each RF cable entrance. Installation of a master ground bus bar and a subsystem ground bus bar is discussed in a separate finding. The following deficiencies are noted:
Cooperator-owned RF cables are not equipped with surge protection devices (SPDs) within 24 inches of each RF cable entrance to the shelter; (8.8 B) The BLM-owned RF surge protection device (SPD) is not properly bonded to the master ground bus bar; (8.8 E) Three cooperator-owned abandoned RF cables are not equipped with SPD within 24 inches of the RF cable entrance; (8.8 L) Cooperator-owned spare RF cables are not equipped with shorting stubs or 50-Ohm loads at the RF cable entrance; (8.8 M) and Cooperator-owned excess spare RF cable is coiled and stored inside the shelter. (8.8 N)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
RF Surge Protection Device Installation RF Surge Protection Device Grounding Spare and Abandoned RF Cables
Recommendation(s): Contact USDA Forest Service to do the following: A) Install a SPD in line on each RF cable within 24 inches of the RF cable entrance to the shelter; B) Cut each RF cable 24 inches after entering the shelter and install two N-type connectors (one male and one female) on the cut cable ends;
C) Ground each RF cable SPD to the master ground bus bar or the subsystem ground bus bar with #6 AWG or coarser, green-jacketed, stranded conductors using UL467-listed, single-hole, irreversible, crimp connector and stainless steel hardware; D) Remove existing grounding conductor and connectors
RF Cable Entry Port with No SPDs
RF Cable SPD Not Installed within 24 Inches of Entry
Excess Spare RF Cables Stored On Site
Report Date: November 29, 2012 Gunsight Peak bonding the SPD to the existing shelter grounding conductor; E) Apply a UL-listed, conductive, antioxidant agent between each mechanical grounding connection; and F) Remove each abandoned or unused RF cable from the shelter and tower.
Driving Reference(s): Motorola R56 Standard 5.4 – connection methods for internal grounding system Motorola R56 Standard 5.4.1 – general bonding requirements Motorola R56 Standard 5.5.1.8.1 – RF surge protection devices Motorola R56 Standard 7.6 – RF components protection Motorola R56 Standard 8.2 – general site environmental requirements
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 8.8)
Report Date: November 29, 2012 Gunsight Peak
EQUIPMENT INSTALLATION – EQUIP
Finding Number: EQUIP-12-006
Finding: The radio frequency cable entrance panel is not sealed at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: Radio equipment is installed in a USDA Forest Service-owned concrete block shelter equipped with two single-port, field-expedient RF cable entrances. One BLM-owned RF cable and 11 cooperator-owned RF cables are routed between the equipment and the RF cable entrances. BLM-owned and cooperator-owned RF cables enter the shelter through a field-expedient open hole in the shelter wall with no sealant. Installation of an external ground bus bar is discussed in a separate finding.
(8.10 C)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
RF Cable Entrance Panel Installation RF Cable Entry Port Weather Seals RF Cable Entrance Panel Grounding
Recommendation(s): Contact USDA Forest Service to do the following: A) Install a replacement four-port, metallic RF cable entrance panel; B) Route the RF cables through the new entrance panel using appropriately sized boots; C) Seal the RF cable entrance ports with manufacturer supplied boots and metal bands; D) Bond the metal RF cable entrance panel to the external ground bus bar with a #2 AWG or coarser, solid, tinned, copper grounding conductor using UL467-listed, two-hole, irreversible, high-compression crimp connectors; and E) Remove nonconductive coatings from bonding surfaces and apply a UL-listed, conductive, antioxidant agent between each mechanical grounding connection.
Driving Reference(s): Motorola R56 Standard 2.12.2.1 – point of entry for RF transmission lines Motorola R56 Standard 2.12.8 – tower transmission cables Motorola R56 Standard 3.7.1 – transmission line entry ports
Field-Expedient RF Cable Entry Port
BLM and Cooperator RF Cables Field-Expedient RF Cable Entry Port
Report Date: November 29, 2012 Gunsight Peak
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 8.10)
Report Date: November 29, 2012 Gunsight Peak
EQUIPMENT INSTALLATION - EQUIP
Finding Number: EQUIP-12-007
Finding: Exterior radio frequency cables do not have ground kits installed at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: Radio equipment is installed in a USDA Forest Service-owned concrete block shelter equipped with two RF cable entrances. One BLM-owned RF cable and 10 cooperator-owned RF cables are routed between the shelter and the guyed wooden monopole tower. Two cooperator RF cables are routed between the shelter and the pipe-mast near the door. Installation of an external ground bus bar and a tower ground bus bar are discussed in separate findings. The following deficiencies are noted:
RF cables are not equipped with ground kits at the base of the tower; (8.11 A) and RF cables are not equipped with ground kits before entering the shelter. (8.11 C)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
RF Cable Ground Kit Installation RF Cable Ground Kit Bonding to Bus Bars
Recommendation(s): Contact USDA Forest Service and cooperators to do the following: A) Install a ground kit on each RF cable at base of the tower, 24 inches above where the cables transition toward the shelter and within 24 inches of the RF cable entrance; B) Weather seal each ground kit using manufacturer provided tape and mastics; C) Bond each ground kit to the tower ground bus bar and the external ground bus bar using stainless steel hardware; and D) Apply a UL-listed, conductive, anti-oxidant agent between each mechanical grounding connection.
Driving Reference(s): Andrew bulletin 237595 – universal grounding kit for coaxial cable installation instructions
Motorola R56 Standard 2.12.2 – design considerations to reduce effects of lightning
Motorola R56 Standard 2.12.2.1 – point of entry for RF transmission lines Motorola R56 Standard 4.2 – lightning activity and exposure Motorola R56 Standard 4.4.3 – external ground bus bar
No Ground Kits at Base of Tower
No Ground Kits Prior to Entering Shelter
RF Cables Not Equipped with Ground Kits
Report Date: November 29, 2012 Gunsight Peak
Motorola R56 Standard 4.4.3.1 – tower ground bus bar Motorola R56 Standard 4.7.9 – RF transmission line and preamplifier grounding
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 8.11)
Report Date: November 29, 2012 Gunsight Peak
EQUIPMENT INSTALLATION - EQUIP
Finding Number: EQUIP-12-008
Finding: Radio frequency cables are improperly installed at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The site is equipped with a 50-foot, guyed, USDA Forest Service-owned, wooden monopole. Six cooperator-owned antennas are installed on the tower. Ten cooperator-owned RF cables are routed between the USDA Forest Service-owned shelter and the pole. The following deficiencies are noted:
Cooperator-owned, vertically installed, RF cables are not supported in 36-inch increments on the tower; (8.13 C) and Cooperator-owned RF cables are routed through or near climbing pegs on the pole. (8.13 H)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
External RF Cable Installation
Recommendation(s): Contact USDA Forest Service and cooperators to do the following: A) Consider replacement of the wooden monopole tower with a 50-foot, self-supporting tower; B) Replace all tape and cross-brads fastening RF cables on the monopole with stainless steel cable fasteners and stainless steel hardware; C) Reroute RF cables away from climbing pegs; and D) Secure each RF cable to the tower and antenna mounts with stainless steel cable fasteners and hardware in 36-inch increments.
Driving Reference(s): ANSI/EIA/TIA-222-G Annex J – maintenance and condition assessment (normative)
Motorola R56 Standard 2.12.8 – tower transmission cables Motorola R56 Standard 8.2 – general site environmental requirements NEC Article 300.11 – securing and supporting NEC Article 820 – community antenna television and radio distribution systems
Unsupported RF Cables on Tower
RF Cables Routed near Climbing Pegs
Improperly Installed RF Cables on Wooden Tower
Report Date: November 29, 2012 Gunsight Peak
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 8.13)
Report Date: November 29, 2012 Gunsight Peak
EXTERNAL GROUNDING - EXTGRD
Finding Number: EXTGRD-12-001
Finding: Metallic objects located within 6 feet of the external ground system are not grounded at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: Radio equipment is installed in a 9-foot 6-inch wide, 14-foot long, 8-foot tall, USDA Forest Service-owned, concrete block shelter. Installation of a shelter ground ring is discussed in a separate finding. The following deficiencies are noted:
Ancillary devices on the radio site are not grounded including the vent hoods; (4.2 L) The cooperator-owned antenna pipe-mast installed on the south side of the building is not grounded;
(4.2 R) Metal roofing panels installed on the shelter are not grounded at each of the four corners; (4.2 T) and The metal side-mount bracket for the BLM antenna is not grounded. (4.2 V Other) (4.2 General)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Grounding Metallic Objects Roof and Side Panel Grounding Antenna Pipe Mast Grounding
Recommendation(s): Contact USDA Forest Service to do the following: A) Ground each metallic ancillary device to the shelter or tower ground ring with a #2 AWG or coarser, bare, solid, tinned, copper grounding conductor; B) Bond grounding conductors to each device using UL467-listed, single or two-hole, irreversible, high-compression, crimp connectors; C) Bond each grounding conductor to the ground ring using exothermic welds or UL467-listed, irreversible, high-compression crimp connectors; D) Ground the side-mounted antenna pipe mast to the shelter ground ring with a #2 AWG or coarser, bare, solid or stranded, tinned, copper grounding conductor using exothermic welds; E) Ground the metal roof at each corner to the shelter ground ring with #6 AWG or coarser, bare, solid, tinned, copper grounding conductors; F) Bond each grounding conductor to the shelter ground ring using irreversible, high-compression, crimp connectors or exothermic welds; G) Fasten each grounding conductor to the roof panels using UL467-listed, two-hole, irreversible, high-compression, crimp connectors and stainless steel
BLM Antenna Mount and Metal Roof Panels Not Grounded
Antenna Pipe-Mast and Metal Siding Not Grounded
Metallic Air Vent Not Grounded
Report Date: November 29, 2012 Gunsight Peak hardware; and H) Remove paint or protective coating from each bonding surface and apply a UL-listed, conductive, antioxidant agent between each mechanical grounding connection.
Driving Reference(s): Motorola R56 Standard 1.5 – glossary
Motorola R56 Standard, Chapter 4 – external grounding Motorola R56 Standard 4.5.4 – methods to reduce corrosion Motorola R56 Standard 4.6 – bonding to external grounding electrode system Motorola R56 Standard 4.7.10 – metallic object requiring bonding Motorola R56 Standard 4.8.1 – side-mounted antenna grounding Motorola R56 Standard 5.3.9 – bonding jumper Motorola R56 Standard 5.4.1 – general bonding requirements Motorola R56 Standard, Appendix F2 – external grounding electrode system
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 4.2)
Report Date: November 29, 2012 Gunsight Peak
EXTERNAL GROUNDING - EXTGRD
Finding Number: EXTGRD-12-002
Finding: A ground ring is not installed at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: Radio equipment is installed in a 9-foot 6-inch wide, 14-foot long, 8-foot tall, USDA Forest Service-owned, concrete block shelter. The shelter is shared with four cooperators including USDA Forest Service, Crawford Logging, and two unknown cooperators. The following deficiencies are noted:
The shelter is not equipped with a ground ring. A ground rod on the north end of the shelter serves as the single-point ground; (4.5 A) and The radio site does not meet the 25-Ohm or less minimum ground resistance. Ground resistance measured 247 Ohms. (4.10 C)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Shelter Ground Ring - Installation Ground Resistance Testing
Recommendation(s): Contact USDA Forest Service to do the following: A) Excavate a 30-inch deep, 30-inch wide trench, encircling the shelter a minimum of 36 inches from the shelter foundation; B) Drive a minimum of eight equally spaced, 8-foot long ground rods full length into the ground in the trench; C) Due to the poor ground resistance test reading at the site, four additional ground rods are recommended to bring the ground resistance down to 25 Ohms or less; D) Drive four additional ground rods 8 feet beyond each corner of the ground ring; E) Interconnect ground rods with #2 AWG or coarser, bare, solid, tinned, copper grounding conductors bonded to each ground rod using exothermic welds (preferred) or UL467-listed, irreversible, high-compression, crimp connectors; F) Provide a #2 AWG or coarser, bare, solid, tinned, copper grounding conductor pigtail for each ancillary device required to be grounded; G) Bond pigtails to the shelter ground ring using exothermic welds (preferred) or UL467-listed, irreversible, high-compression, crimp connectors; and H) Backfill the trench using a mixture of compacted soil and grounding enhancement material.
Ground Rodused as Single- Point Ground
Three-Point Ground Test Results
Radio Facility
Report Date: November 29, 2012 Gunsight Peak
Report Date: November 29, 2012 Gunsight Peak
Driving Reference(s): MIL-HDBK-419A 1.2.2.1(b) – selection of electrode configuration, frost line Motorola R56 Standard 4.7.7 – dedicated communications building grounding Motorola R56 Standard 4.1 – introduction Motorola R56 Standard 4.4.1 – grounding electrodes Motorola R56 Standard 4.4.1.2.1 – ground rod specifications Motorola R56 Standard 4.4.1.2.2 – ground rod installation Motorola R56 Standard 4.4.1.3 – electrolytic ground rods Motorola R56 Standard 4.4.1.5 – concrete encased electrodes Motorola R56 Standard 4.4.1.6 – external building and tower ground ring Motorola R56 Standard 4.4.1.7 – radial (counterpoise) grounding conductors Motorola R56 Standard 4.4.1.9 – grounding electrode encasement materials Motorola R56 Standard 4.4.2 – grounding conductors Motorola R56 Standard 4.4.2.1 – general specifications Motorola R56 Standard 4.4.2.2 – bending and routing grounding conductors Motorola R56 Standard 4.5.4 – methods to reduce corrosion Motorola R56 Standard 4.6 – bonding to external grounding electrode system Motorola R56 Standard 4.7.4 – grounding electrode system resistance requirements Motorola R56 Standard 4.7.4.2 – type “B” sites – standard duty Motorola R56 Standard, Appendix B.1 – soil resistivity and factors affecting soil resistivity
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist items 4.5 and 4.10)
Report Date: November 29, 2012 Gunsight Peak
EXTERNAL GROUNDING - EXTGRD
Finding Number: EXTGRD-12-003
Finding: External ground bus bars are not installed on the Gunsight Peak Radio Site shelter.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The BLM is a cooperator in the USDA Forest Service-owned 9-foot 6-inch wide, 14-foot long, 8-foot tall concrete block shelter, equipped with two RF cable entrances. Installation of a shelter ground ring is discussed in a separate finding. The shelter is not equipped with an external ground bus bar below each RF cable entrance. (4.6 A)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
External Ground Bus Bar Installation
Recommendation(s): Contact USDA Forest Service to do the following: A) Install a 12-inch wide, 4-inch tall, ¼-inch thick, UL467-listed, copper, external ground bus bar, with predrilled holes, within 24 inches below each RF cable entrance; B) Fasten each external ground bus bar to the shelter using stainless steel mounting brackets with 15-kV isolators; C) Ground each external ground bus bar to the shelter ground ring with a #2 AWG or coarser, bare, solid, tinned, copper grounding conductor; and D) Bond each grounding conductor to the external ground bus bar and ground ring using exothermic welds (preferred) or UL467-listed, irreversible, high-compression, crimp connectors.
Driving Reference(s): Motorola R56 Standard 4.4.3 – external ground bus bar Motorola R56 Standard 4.7.7 – dedicated communications building grounded
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Site (Checklist item 4.6)
BLM Antenna and Wooden Tower
RF Cable Entry Port with No External Ground Bus Bar
RF Cable Entry Port with No External Ground Bus Bar
Report Date: November 29, 2012 Gunsight Peak
EXTERNAL GROUNDING - EXTGRD
Finding Number: EXTGRD-12-004
Finding: A tower ground ring is not installed at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The radio site is equipped with a 50-foot, USDA Forest Service-owned, guyed, wooden monopole tower. Six cooperator-owned antennas are installed on the tower. The tower is not equipped with a ground ring. The wooden monopole tower has a single grounding conductor routed from the top to the bottom, bonded to the common ground rod on the north side of the shelter. (4.7 A)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Tower Ground Ring - Installation Bonding the Tower and Shelter Ground Ring Wood Antenna Structure
Recommendation(s): Contact USDA Forest Service to do the following: During installation of the shelter ground ring, bond the vertical ground conductor on the wooden monopole tower to the shelter ground ring in two places, using exothermic welds.
Driving Reference(s): MIL-HDBK-419A 1.2.2.1(b) – frost line electrode configuration selection Motorola R56 Standard 4.1 – introduction Motorola R56 Standard 4.4.1 – grounding electrodes Motorola R56 Standard 4.4.1.2.1 – ground rod specifications Motorola R56 Standard 4.4.1.2.2 – ground rod installation Motorola R56 Standard 4.4.1.6 – external building and tower ground ring Motorola R56 Standard 4.4.2 – grounding conductors Motorola R56 Standard 4.4.2.1 – general specifications Motorola R56 Standard 4.4.2.2 – bending and routing grounding conductors Motorola R56 Standard 4.5.4 – methods to reduce corrosion Motorola R56 Standard 4.6 – bonding to external grounding electrode system Motorola R56 Standard 4.7.6 – tower grounding Motorola R56 Standard 4.7.7 – dedicated communications building grounding Motorola R56 Standard 4.11.4 – stone top mountains
Wooden Monopole Tower with Single Ground Conductor
Wooden Monopole Tower with Single Ground Conductor
Single Ground Rod
Report Date: November 29, 2012 Gunsight Peak
Motorola R56 Standard 4.11.5 – sand, coral, or limestone environments Motorola R56 Standard 4.11.6 – shallow topsoil environments
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 4.7)
Report Date: November 29, 2012 Gunsight Peak
EXTERNAL GROUNDING - EXTGRD
Finding Number: EXTGRD-12-005
Finding: A tower ground bus bar is not installed at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The radio site is equipped with a 50-foot, USDA Forest Service-owned, guyed, wooden monopole tower. Six cooperator-owned antennas are installed on the tower. The tower is not equipped with a tower ground bus (TGB) bar at the base. (4.9 A)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Tower Ground Bus Bar Installation
Recommendation(s): Contact USDA Forest Service to do the following: A) Install a 12-inch wide, 4-inch tall, ¼-inch thick, UL467-listed, tinned, copper, bus bar with predrilled holes, near base of the tower below the RF cable horizontal transition toward the shelter; B) Fasten the bus bar to the tower using stainless steel mounting brackets with 15-kV isolators; C) Ground the bus bar to the shelter ground ring with a #2 AWG or coarser, bare, solid, tinned, copper grounding conductor; and D) Bond the grounding conductor to the tower ground bus bar and shelter ground ring using exothermic welds (preferred) or UL467-listed, irreversible, high-compression, crimp connectors.
Driving Reference(s): Motorola R56 Standard 4.4.2.2 – bending and routing grounding conductors Motorola R56 Standard 4.4.3.1 – tower ground bus bar NEC Article 352 – rigid polyvinyl chloride conduit
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak Facility Category: Radio Site (Checklist item 4.9)
Radio Facility with Wooden Monopole Tower
Wooden Monopole Tower No TGB Installed at Base of Tower
Report Date: November 29, 2012 Gunsight Peak
EXTERNAL GROUNDING - EXTGRD
Finding Number: EXTGRD-12-006
Finding: Guy wires and guy anchors are not grounded at the Gunsight Peak Radio Site.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The BLM is a cooperator on the 50-foot, USDA Forest Service-owned, guyed wooden monopole tower equipped with six cooperator-owned antennas. The BLM antenna is side-mounted on the block shelter. The following deficiencies are noted:
Each guy anchor is not grounded; (4.11 A) and Guy wires are not grounded at each guy anchor. (4.11 I)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Guy Anchor Grounding
Recommendation(s): Contact USDA Forest Service to do the following: A) Install an 8-foot ground rod, 24 inches from each guy anchor foundation; B) Bond the guy anchor to the ground rod with a #2 AWG or coarser, bare, solid, tinned, copper grounding conductor using exothermic welds or UL467-listed, irreversible, high-compression, crimp connectors; C) Ground the guy wires at each guy anchor with #2 AWG or coarser, bare, solid, tinned, copper grounding conductors bonded to each guy anchor ground rod using exothermic welds or UL-467-listed, irreversible, high-compression, crimp connectors; D) Route grounding conductors between each guy wire and the ground rod in a direct manner, downward toward the earth’s surface using minimal bends not exceeding an 8-inch radius; E) Bond the grounding conductor to each guy wire using UL467-listed guy wire clamps (Harger SSC25/875 or comparable); F) Bond the grounding conductors to each ground rod, using exothermic welds or UL467-listed, irreversible, high-compression, crimp connectors; and G) Apply a UL-listed, conductive, antioxidant agent between each mechanical grounding connection.
Radio Facility with Guyed Wooden Tower
Guy Wire and Anchor with No Grounding
Guy Wire and Anchor with No Grounding
Report Date: November 29, 2012 Gunsight Peak
Driving Reference(s): Motorola R56 Standard 2.12 – tower design and construction Motorola R56 Standard 2.12.1 – tower design drawings Motorola R56 Standard 2.12.4 – regulations affecting towers Motorola R56 Standard 4.4.2 – grounding conductors Motorola R56 Standard 4.5.1 – corrosion related to soil type Motorola R56 Standard 4.5.4 – methods to reduce corrosion Motorola R56 Standard 4.7.6.2 – guyed towers
Point(s) of Contact: Not provided
Status of Corrective Action: Not provided
Facility Name: Gunsight Peak
(Checklist item 4.11)
Report Date: November 29, 2012 Gunsight Peak
INTERNAL GROUNDING - INTGRD
Finding Number: INTGRD-12-001
Finding: A master ground bus bar and a subsystem ground bus bar are not installed in the Gunsight Peak Radio Site shelter.
Repeat Finding: N/A
Recurring Issue: N/A
Safety RAC: 3
Discussion: The BLM is a cooperator in a USDA Forest Service-owned, 9-foot 6-inch wide, 14-foot long, 8-foot tall concrete block shelter equipped with two RF cable entrances. Installation of a shelter ground ring is discussed in a separate finding. The following deficiencies are noted:
The shelter is not equipped with a master ground bar below the primary RF cable entrance; (5.1 A) and A subsystem ground bus bar is not installed below the secondary RF cable entrance. (5.1 B)
RI CASHE Standard Discussion: Click on the relevant topic below for a detailed discussion on the issue(s) identified in this finding.
Master Ground Bus Bar - Installation Subsystem Ground Bus Bar Installation
Recommendation(s): Contact USDA Forest Service to do the following: A) Install a 12-inch wide, 4-inch tall (minimal size) UL467-listed, copper, master ground bus bar, with predrilled holes, within 24 inches below the primary RF cable entrance on the north wall; B) Fasten the master ground bus bar to the wall using stainless steel mounting brackets with 15-kV isolators; C) Ground the master ground bus bar to the shelter ground ring with a #2 AWG or coarser, bare, solid, tinned, copper grounding conductor; D) Route the grounding conductor from the master ground bus bar through a 3/8-inch hole (drilled at a 45-degree angle) in the shelter wall and down to the shelter ground ring; E) Route the grounding conductor in a direct manner, down and toward the earth’s surface, using gradual bends no less than 8 inches; F) Bond the grounding conductor to the master ground bus bar using UL467-listed, two-hole, irreversible, high-compression, crimp connectors or exothermic welds; G) Bond the grounding conductor to the shelter ground ring using UL467-listed, irreversible, high-compression, crimp connectors or exothermic welds; H) Install a 12-inch wide, 4-inch tall, UL467-listed, copper, subsystem ground bus bar, with…
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