Attachment_6_CAFB_Electrical_Standards__2014.pdf

Last Edited by: Diep Nguyen

Base Electrical Engineer

Print Date: March 13, 2012

Cannon Air Force Base Page 1

U.S. AIR FORCE

Electrical Standards

Cannon AFB, New Mexico

2 7 S O C E S / C E O

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Table of Contents

GENERAL REQUIREMENTS 5

ELECTRICAL UTILITIES 6

GENERAL DESCRIPTION 6

SPECIFIC REQUIREMENTS 6

EXTERIOR LIGHTING 6

INTENT 6

APPLICABILITY 6

EXCEPTIONS 6

PROHIBITED LIGHTING 7

SPECIFIC REQUIREMENTS 7

EXTERIOR ELECTRICAL WORK 10

APPLICABILITY 10

SPECIFIC REQUIREMENTS 10

INTERIOR ILLUMINATION LEVELS 11

INTERIOR ELECTRICAL WORK 12

APPLICABILITY 12

SPECIFIC REQUIREMENTS 12

LIGHTNING PROTECTION 13

SPECIFIC REQUIREMENTS 13

CONTRACTING PACKAGE 13

Underlined text is the most recent editorial on print Date

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Electrical Standards

General Requirements

1. Site and project specific electrical security requirements will be developed with the advice and assistance of the 27SOCES/CEN and CEO flights.

2. As a minimum, design in accordance with the latest issue of the NFPA 70, National Electrical

Code (NEC); Design Safety Requirements for

Electrical Systems (29 CFR 1910); Section 340 of the Energy Conservation and Production Act (42

U.S.C. 6834); Unified Facilities Criteria (UFC) 1-

200-01, General Building Requirements; UFC 3-501-

01, Electrical Engineering; UFC 3-520-01, Interior

Electrical Systems; UFC 3-530-01, Design: Interior and Exterior Lighting and Controls; UFC 3-550-01, Exterior Electrical Power Distribution; the latest applicable Unified Facilities Guide Specifications

(UFGS); and applicable Engineering Technical

Letters (ETLs) and as specified, herein, or in the requirements document. Incorporate any additional and/or more stringent requirements specified, herein, or in the project requirements document.

3. For large electrical designs perform electrical load analysis, coordination study, voltage drop analysis, conductor sizing and other design calculations as required by the 27 SOCES PM

(Project Manager), Base Electrical Engineer and

Electrical Superintendent.

4. Perform a fault current analysis starting with the available short circuit megavolt ampere (MVA) at the point of service to the facility transformer(s) and computing the minimum rating for all fuses, circuit breakers, panel boards and bussing.

5. Ensure that the primary distribution has adequate capacity to supply the added load imposed by the proposed project. Submit this data to the 27

SOCES PM in SKM Power Tools for Windows or other electronic format as approved by the 27 SOCES PM. Submit final approved copies of this data to Central Engineering

Files (CEF).

6. Primary voltage is 12470/7200 V, 3 phases, except Airfield circuits.

7. Secondary voltage is 277/480 V or 120V/208

V.

8. The Cannon Air Force Base (CAFB) Fire

Department and Safety Office shall be invited to participate in all design reviews that include fire protection systems.

9. The CAFB Electrical Engineer and Electrical

Superintendent shall be invited to participate in all facility design reviews and design reviews impacting the medium voltage distribution system. The CAFB Electrical

Engineer and Electrical Superintendent shall be required to concur with all designs that affect the medium-voltage distribution system. Concurrence shall be provided by signature on drawings and specifications prior to approval and construction.

10. All electrical equipment shall be UL listed and shall conform to Factory Mutual (FM)

Standards as applicable. Exceptions shall be approved by the PM, Base Electrical Engineer and Electrical Superintendent.

11. All electrical designs shall provide an updated panel schedule (if affected) with the design package. The latest panel board schedule can be obtained from CE and should be compared with the panel schedule in the field

(if available). If there are differences of a significant nature, or no field schedule is available, inform the Contracting Officer’s

Technical Representative, 27 SOCES PM or the construction monitor for resolution.

Once work has been completed, the contractor or shops performing the work shall ensure the updated panel schedule is installed in/on the panel board and the panel schedule is returned to 27 SOCES.

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12. In matters of facility design, construction, operations and maintenance, the safety and health of employees and the public and mitigation of any adverse impacts on the environment take precedence over other aspects such as function, cost or expediency.

ES&H facility performance objectives shall comply with applicable provisions of the latest edition of the 27 SOCES/CAFB Environmental

Resources Document (ERD).

13. Minimum primary distribution conduit for medium voltage conductor burial depth shall be 36 inches to top of concrete encasement. Note: All primary medium voltage distribution shall be in conduit, encased in 3000 psi concrete and shall have metallic strip caution tape installed per the NEC.

Concrete encasement will contain red dye or top surface painted red.

Electrical Utilities

General Description

Utilities are a functional and unavoidable element that should be blended into other site features. These elements can create visual clutter. Therefore, every effort should be made to minimize the negative impact to increase focus on more aesthetic areas in the landscape. Relocating significant utilities lines and equipment away from high visibility areas will have the greatest impact in improving the overall character of the installation.

Specific Requirements

New overhead primary and secondary distribution are prohibited on CAFB. Primary distribution at Melrose

Range is the responsibility of Roosevelt Electric.

Existing overhead distribution shall be relocated underground at the earliest opportunity.

1. Exposed cables, conduit and conductors are prohibited. Exceptions shall be submitted to and approved by 27th SOCES.

2. Utility structures shall be incorporated with building designs to avoid free standing elements.

3. Pad mounted equipment shall be located in less visible areas and screened.

4. Irrigation back flow preventers may use solar powered housing.

5. Utilities shall be collocated prior to entering the service side of the buildings.

6. Underground electrical distribution vaults are prohibited.

Lighting

Exterior Lighting

Intent

To set forth lighting standards for outdoor uses that serve to create a safe and comfortable nighttime environment, while protecting the public’s ability to view the night sky. These lighting standards are designed to ensure personal safety and prevent motor vehicle and pedestrian conflicts by reducing the negative effects of glare, light pollution and light trespass.

Applicability

Designs will comply with the NFPA 70 (NEC);

Design Safety Requirements for Electrical Systems (29

CFR 1910); Section 340 of the Energy Conservation and Production Act (42 U.S.C. 6834); UFC 3-501-

01, Electrical Engineering; UFC 3-530-01, Design:

Interior and Exterior Lighting and Controls; applicable

Engineering Technical Letters (ETLs), and this document. The outdoor lighting regulations contained herein shall apply to all exterior lighting and to interior lighting to the extent that interior lighting impacts the outdoor environment, including lighted signage.

Exceptions

1. Lighting required by the FAA for the air traffic control and warning purposes.

2. Airfield operations, aprons and adjacent areas use lighting requirements from UFC 3-535-

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01, Design Standards for Visual Air Navigation

Facilities.

3. Requirements stated in UFC 3-530-01, Design:

Interior and Exterior Lighting and Controls, that conflict or are more stringent than those listed in this document.

4. Temporary lighting required for emergency purposes, construction lighting, or repairs.

5. Temporary low-wattage lighting for public festivals or events and holiday observances provided disability glare is not created.

6. Single-family residential lighting, except as prohibited in this document.

Prohibited Lighting

1. Low pressure sodium and mercury vapor lamping.

2. Blinking, flashing or changing intensity lights including those proposed for signage.

3. Lighting that could be confused with traffic control devices.

4. Lighting of a type, style or intensity determined to interfere with the safe flow of traffic.

5. Strobe lights, searchlights, beacons and laser light or similar upward or outward oriented lighting.

6. Lighting creating a public hazard, including lighting that creates disability glare, particularity where such disability glare has a detrimental effect on motor vehicle traffic.

7. Lighting mounted on poles for the purpose of illuminating the building façade.

8. High-intensity floodlighting except as approved for sport facility lighting.

9. Wall pack light fixtures that are not classified as full cutoff.

1. Light levels for streetscapes, parking and pedestrian areas shall be no more than 5 foot-candles (fc) and not less than 0.2 fc.

2. Timer/Photocell combination full cutoff controls that turn on at dusk and turn off at sunrise or selected times shall be used for all exterior fixtures including parking lots.

3. All exterior lights shall be full cut-off fixtures.

4. All service to exterior lighting shall be underground or solar powered.

5. All pole mounted fixtures shall be shoebox type, factory finished medium bronze, and mounted on a tapered round pole with one or two arms depending on the light level and coverage needed.

6. Roadway and parking lot lights shall be mounted at a height of 30’ 0” maximum.

7. Roadway Lighting:

a. Primary, secondary, tertiary and service roadways shall all use the same luminaries, poles and mounting heights.

b. Poles mounted along roads shall be spaced evenly, as feasible.

c. Lighting shall be provided on all corners of intersections.

8. Parking Lot Lighting:

a. Pole placement shall be coordinated with the layout of parking islands.

b. A maximum of two light fixtures per pole is recommended for parking lots, except for perimeter lighting which should be limited to one fixture per pole.

c. Perimeter lighting shall be classified by

IES as Type II or Type III.

9. Pole mounted fixtures in parking lots or

Page 8 Cannon Air Force Base Last Edited by: Robert Hill unprotected areas of traffic shall be mounted on a 2’ 6” concrete pier.

10. Pedestrian Lighting:

a. Pole mounted walkway lighting shall be 12’

0” high.

b. Bollard lighting is prohibited.

c. Pedestrian scale lighting shall be provided along sidewalks and recreational trails that are not directly adjacent to lighted roadways.

11. Traffic signals shall match the style and form of those on Air Commando Blvd.

12. Outdoor lighting shall meet the following requirements:

a. Light fixtures, except as otherwise permitted in this Standard, are required to be full cutoff as defined by the Illuminating

Engineering Society of North America

(IESNA).

b. Full cutoff light fixtures result in a light distribution pattern where no light is permitted at or above a horizontal plane at the bottom of the fixture.

13. All outdoor light fixtures should utilize one of the following lamp types:

a. Metal halide,

b. Electrode-less induction,

c. Compact fluorescent,

d. Incandescent (including tungsten-halogen),

e. High pressure sodium (HPS),

f. Light Emitting Diodes (LED) in compliance with Engineering Technical Letter (ETL) 10-2:

Light-Emitting Diode (LED) Fixture Design and

Installation Criteria for Interior and Exterior

Lighting Applications, 18 March 2010 or most current version, and

g. Alternative lamp types are permitted provided they are approved by CAFB and can be demonstrated to be more effective for the proposed use, based on

IESNA recommendations.

14. Full cutoff fixtures may not be tilted or aimed in a manner that results in light distribution above the horizontal plane.

15. Canopy Lighting:

a. Light fixtures associated with canopies, including but not limited to fuel islands, seasonal outdoor areas and bank drive-through, shall be full cutoff or mounted so that the bottom of the lens is recessed or flush with the bottom surface of the canopy.

b. All light emitted from canopies shall be substantially confined to the ground plane directly beneath the perimeter of the canopy.

c. No lighting of any kind shall be allowed on the top or sides of a canopy, unless approved by CAFB.

d. Spacing between fixtures and height of canopies shall be designed so that the luminance level under the canopy does not exceed 20 fc.

16. All light fixtures within 15’ 0” of Cannon

Family Housing or base boundaries adjacent to residential areas shall be classified as IES

Type II or Type III. Fixtures shall be fitted with “house side shield” reflectors on the sides facing the residential areas.

17. Luminance levels shall not exceed 10 fc measured as initial horizontal luminance unless stated otherwise in this document. The initial luminance level is measured following

100 hours of operation.

18. The luminance levels at building entrances and windows may exceed 10 fc by 100% up to a distance 5’ 0” from the building to accommodate light spillage from within the building and light from signage.

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19. The use of semi-cutoff or cutoff (as opposed to full cutoff) fixtures shall be permitted to illuminate areas other than parking lots provided the pole or mounting point is no more than 10’

0” in height and the maximum lumen output does not exceed 1800 lumens per lamp.

20. When semi-cutoff or cutoff fixtures are used, a maximum of one lamp per fixture and two fixtures per pole or mounting point is required.

21. Fixtures located on pole or at mounting points more than 10’ 0” in height or exceeding 1800 lumens per lamp shall be full cutoff fixtures. All lighting, except those required for security as listed below, shall be reduced to security levels within one hour after the end of business day until one hour prior to the commencement of the next business day.

22. Security lighting at entrances, stairways, loading docks and parking lots is permitted.

23. Motion sensors for security lighting are strongly encouraged and shall not be located as to activate lighting by normal pedestrian and vehicular traffic.

24. All exterior recreational area lighting used for the purpose of illuminating the playing area shall be turned off following the conclusion of the final event of the night. The remainder of the lighting around the field shall be turned off within one hour after the event and remain off until one hour prior to the next event.

25. Lighting in residential areas and open spaces should be limited to 2400 lumens per fixture unless shielded.

26. Accent Lighting:

a. Wall mounted light fixtures are encouraged for wall washing architectural features and lighting plazas, enhanced paving and stairs.

Surface mounted fixtures may be installed on burnished or smooth block.

b. Luminance for a building façade to enhance architectural features may be permitted provided it is approved by

CAFB. Building facades may be illuminated to a maximum of 20 fc as measured on the façade.

c. Lights mounted on poles for the purpose of lighting the building façade are not permitted.

d. Illumination of a flag on a flagpole is permitted provided a narrow spread 39-watt PAR metal halide or 50-watt PAR-halogen lamp or equivalent lamp with narrow spear is used and aimed to only illuminate the top of the flagpole.

e. Accent lights should be used sparingly to create hierarchy of architectural and landscape features.

27. Signage:

a. Luminance of a sign face by a ground mounted fixture shall not exceed 50 fc.

Recommend using lighter lettering on a dark back ground to maximize visibility.

b. Signage that is internally lit shall be limited to a maximum of 1,000 watts.

c. No sign shall be illuminated with fixtures that allow for the unshielded upward transmission of light.

d. All signage lighting shall be turned off within one hour of the end of business day and remain off until one hour prior to commencement of the next business day.

28. CAFB will review lighting plans for compliance with the requirements of this

Standard. All drawings sets shall include:

a. A narrative describing how the design of the proposed lighting, including the fixture types, mounting heights, lamp

Page 10 Cannon Air Force Base Last Edited by: Robert Hill types, locations, luminance levels, controls and sign lighting complies with the intent of the context and regulation contained in this document.

b. Identification and description of all light fixture locations including whether they are pole, ground or building-mounted.

c. The location of the light fixtures shall also be shown on the Landscape Plan.

d. Description of light-level-reduction controls for each fixture or grouping of fixtures and resulting after-hours light levels.

e. Maximum outdoor luminance levels shall include signage lighting and light spillage from within a building. The impact of this luminance shall be described in the Lighting

Plan narrative.

Exterior Electrical Work

Designs will comply with the NFPA 70 (NEC); Design

Safety Requirements for Electrical Systems (29 CFR

1910); Section 340 of the Energy Conservation and

Production Act (42 U.S.C. 6834); UFC 3-501-01, Electrical Engineering, UFC 3-550-01; Exterior Electrical

Power Distribution; and applicable Engineering Technical

Letters (ETLs).

1. Underground Distribution and Medium Voltage

Service:

a. Medium Voltage Conductors: Medium voltage conductors shall be copper, 15KV, XLP 133% insulation, type MV105, concentric neutral with PVC jacket (#2 minimum size). Conductor installation plans shall not be included in the specifications.

b. Primary distribution conductor pulling calculations are required for any exterior underground conductor pulls over 500 feet in length. Conductor lengths longer than 500 feet require 27 SOCES Electrical Engineer and

Electrical Superintendent approval. Maximum conductor size is 500 MCM for all medium and low voltage.

c. Medium voltage conductor terminations and splices shall be of the preformed type only. Tape type terminations are not acceptable.

d. Medium voltage high potential tests will be done in accordance with IEEE 400.2, “Guide for Testing of Shielded Power

Cable Systems using Very Low

Frequency (VLF)".

e. All underground distribution pad-mounted switch gear should be of the 4-way

Cooper VFI series (or other manufacturer equivalent meaning that fusing is not the sole sensing mechanism).

Switches should also sense and open ground fault conditions. Visible-break option should be selected.

f. All concrete pads for pad mounted electrical equipment (switches, sectionalizing cubicles and transformers) shall be cast-in-place concrete pads. Pre-cast pads are prohibited.

g. All medium voltage connections are to be made using 600 amp dead break, 200 amp load break connections. No live equipment is authorized for use.

h. All primary service shall be in PVC ducts using type conductors with concentric neutral compatible with base system. All duct banks containing medium voltage

(over 600 volts) shall be 3000 psi red dyed concrete encased.

i. Primary distribution (along main run, between underground structures and on laterals) will be in duct banks using 5-inch diameter conduits minimum. Secondary distribution low voltage (600 volts and less) duct banks between transformers and service entrance will be 4-inch diameter conduits minimum.

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2. Lighting Poles shall be a maximum 30’ anodized medium bronze tapered round steel with shoe box fixture to match existing CAFB standard.

Troop walk and sidewalk lighting shall be accomplished using High Pressure Sodium (HPS) luminaries not to exceed 70 watts. Bollard fixtures shall not be used unless specifically so stated in project definition and approved by

CAFB.

3. Area lighting, where required, shall be accomplished using Electrode-less Induction

(preferred) or HPS luminaries on 30’ (maximum) anodized medium bronze tapered round steel poles. High mast lighting shall be considered for large square parking lots. Use of LED fixtures for area lighting should be avoided and not be used unless approved by the Base Electrical Engineer and the Electrical Superintendent.

4. Transformers:

a. New building service transformer shall be pad mounted, environmentally friendly oil filled, air cooled, copper wound and served by an underground concrete encased duct bank on the primary side. Mounting location shall comply with UFC 3-600-1, Fire

Protection Engineering for Facilities, building separation distance criteria.

b. Transformer fusing shall be current limiting fuses combined with load sensing Bay-O-

Net fuses.

c. Transformers shall be provided with a no-load tap changer with 2.5% above and 2.5% below rated voltage taps. The high-voltage compartment shall be a dead front construction with load break switching.

d. All transformers shall be feed-through unless otherwise approved. Switches shall be mounted inside the transformer tank with switch operating handles located in the high voltage compartment and equipped with metal loops for hook stick operation.

Adjacent to switches nameplates shall identify switch operating handles and “ON” and “OFF” positions.

e. Transformers installed south east of

Runway 04/22 should have dual primary voltage of 12,470V and 4,160V unless otherwise requested and approved by

CAFB Electrical Engineer.

f. All pad-mounted transformers shall be screened from view and provide working space in accordance with the National

Electric Code. Screen type shall adhere to the Cannon AFB Architectural

Compatibility Guide. All transformers shall have main breakers to buildings.

5. Manholes: All electrical concrete manholes, hand holes and pull boxes shall be of the precast type and shall be designed with adequate drainage and waterproofing.

Concrete shall be 4000 psi. The use of load junctions and separable splices shall not be permitted. Terminations shall be made above ground. Manholes should be limited to airfield clear zones to facilitate maintenance.

Exceptions as approved by the CAFB

Electrical Engineer.

6. Aerial to Underground Medium Voltage:

Connections shall be made in accordance with Air Force Joint Manual (AFJMAN) 32-

1080. Pole risers shall be intermediate metal conduit in conformance with National

Electrical Code.

7. Metering: All electrical shall be metered utilizing Schneider Electric/Square D ION

8600 series meters. All meters shall contain a separate indicator for measuring maximum kilowatt demand and pulse initiator. Pulse I initiators shall be solid state and factory installed. Meters shall be installed with shorting blocks or test switches to allow removal of the meter. Meters shall be compatible and able to communicate with the

CAFB Emergency Management

Communication System (EMCS) and the

Automatic Meter Reading System (AMRS).

8. As a minimum use NEMA Type 3S or better enclosures for outdoor non-hazardous

Page 12 Cannon Air Force Base Last Edited by: Robert Hill locations to provide a degree of protection against the ingress of windblown dust over Type

3R.

Interior Illumination Levels

Illumination shall be based and designed in accordance with the requirements of UFC 3-530-01, Design: Interior and Exterior Lighting and Controls, ASHRAE

90.1/ International Energy Conservation code (IECC), and Illuminating Engineering Society of North

America (IESNA). The recommended levels of illumination in foot-candles (fc) are as follows:

Office (ambient lighting) 30 fc horizontal

Office (task lighting) 50 fc horizontal

Storage Areas 10 fc vertical

Conference Rooms (ambient) 30 fc horizontal

Conference Rooms (task) 50 fc horizontal

Utility and Janitor Closets 30 fc horizontal

Communications Rooms 30 fc horizontal

Restrooms (ambient) 5 fc horizontal

Restrooms (at mirrors) 30 fc horizontal

Interior Electrical Work

Designs will comply with the NFPA 70 (NEC); Design

Safety Requirements for Electrical Systems (29 CFR

1910); Section 340 of the Energy Conservation and

Production Act (42 U.S.C. 6834); UFC 3-501-01, Electrical Engineering; UFC 3-520-01, Interior Electrical

Systems; and applicable Engineering Technical Letters

(ETLs).

1. Conductors: Conductors shall be copper.

Conductors #12 AWG and larger shall be stranded. Minimum acceptable size for power conductors shall be #12 AWG, 75 degree.

2. All panels shall have 30% spares/spaces and spare load capability for future requirements. The 30% spares/spaces include panel spaces containing installed spare circuit breakers and those that are empty (unused) spaces. Spare load capability includes the panel rating and the conductors to the panel from the source. Adjacent multiple panels from the same source at the same voltage may be combined in meeting the 30% spares/spaces and load requirements. Panels will have a clear three

(3) foot unobstructed working zone from ceiling to floor. Dry pack transformers will not be installed over or under panels.

3. Interior Wiring Conduit:

a. No rigid nonmetallic conduit or electrical nonmetallic tubing shall be allowed. If conduit runs penetrate firewalls, conduit shall be used a minimum of three feet on each side. Metal-clad (type MC) cable and Armored Cable (type AC) are not acceptable and shall be so stated in the specifications under “wiring methods.”

Raceways must comply with UFC 3-520-

01. Aluminum conduit shall be used for all 400 Hz applications.

b. All interior conduits shall be installed overhead with the exception of the service entrance – transformer to Main

Control Panel (MCP) – which shall be under slab.

c. Interior conduits may be installed under facility concrete slab, within concrete second floor concrete slab floor, or under raised floor for specific applications if approved by the Base

Electrical Engineer and the Electrical

Superintendent.

4. No exposed conduit or piping shall be permitted on exterior of building surface.

Exterior disconnect switches shall be a maximum of 42” above grade. Set-screw connectors and couplings shall not be used.

5. Exposed metal raceways are not permitted in areas with finished walls.

6. Provide general purpose convenience receptacles to meet UFC 3-520-01 minimum requirements or user needs.

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7. GFI receptacles are required for each receptacle within six (6) feet of plumbing fixtures and in kitchen areas as required by AFI 91-203.

8. No equipment grounding conductor shall be installed in empty or low control voltage conduits.

9. Low Voltage Dry Type Distribution

Transformers: All new low voltage dry type, copper wire distribution transformers 15 KVA and larger shall comply with NEMA TP-1 standards for energy efficiency.

10. Exit lights: All EXIT lights shall be of the high intensity LED type with the following standard features: Die cast aluminum housing; canopy and faceplate with white powder coated finish; dual voltage (120/277V); polymeric diffuser; white face with 6” high red letters; single face or double face and directional arrows, as required;

and 3 watts maximum (for either single or double face version). The emergency features shall include: Maintenance-free nickel cadmium battery, automatic low-voltage disconnect, reverse polarity and short-circuit protection, AC indicator light, push-to-test switch, and constant current charger. The nickel cadmium battery shall carry a minimum of a 5-year full warranty.

Exterior EXIT lights shall be vandal resistant.

11. Fluorescent Lamps: All 4’, T5 with matching rapid start electronic ballasts, rapid start fluorescent lamps, 28 watt. Also, compact fluorescents lights and LEDs shall be given consideration, in concurring with UFC 3-530-01 and applicable Engineering Technical Letter (ETL) as well for use in hallway lighting. Fluorescent lamps shall be low mercury content.

12. Fluorescent Fixtures: Lighting for general office areas, classrooms, corridors, conference rooms and lobbies shall be provided by 2’ x 4’ recessed fluorescent fixtures incorporating an aluminum parabolic louver with 27 cell, low iridescent, specular silver, parabolic louver.

13. Emergency Lighting: Emergency lighting must be provided IAW the latest Edition NFPA 101.

Normally, emergency lighting is required only for designated stairs, aisles, corridors, ramps, escalator and passageways leading to an exit.

Unit equipment must be circuited to comply with NEC. Do not use fixtures with wall-mounted battery packs. Emergency lights must be integral to installed fluorescent lighting or must be controlled by central battery backup system.

14. Lighting Levels: Design of interior illumination levels shall include evaluation of multi-level switching to provide user-adjustable levels of lighting, as well as dimming and work area lighting. Design

Analysis shall address all options considered to minimize energy consumption while providing effective lighting and document the reasons for choices made. Multi-level switching, using multiple ballasts and separately switched circuits to provide adjustable levels of lighting, is the minimum standard for all facilities. An example is having one tube on one ballast and two tubes on another ballast in a 2’x 4’ troffer so that one, two or three bulbs in a 3-bulb system can be selected. Another design tool is to provide additional switches to sectionalize the room in addition to level control. Other design considerations include task lighting, strategically placed down lights, dimmers, photoelectric controls, occupancy sensors, LEDs, solar lighting and day-lighting design all giving users flexible control of their workspace lighting and conserve energy.

Lightning Protection

Lighting Protection System (LPS) requirements will be IAW UFC 3-575-01, Lightning and Static

Electricity Protection Systems; NFPA 780, Standard for the Installation of Lightning Protection Systems;

and any applicable ETLs.

1. Lightning protection should be considered on

Page 14 Cannon Air Force Base Last Edited by: Robert Hill all new facilities. Air terminals are preferred.

Clamp-type connectors shall only be used for the connection of the roof conductor to the air terminal and to the guttering. All other connections, bonds and splices shall be done by exothermic welds or by high compression fittings. Down conductors shall be protected by placing in PVC conduit for a minimum distance of

72 inches above finished grade level.

2. Copper air terminals and conductors shall be used.

3. Due to CAFB environmental conditions all air terminals and cable clamps shall be attached to the facilities using non-adhesive attaching methods.

4. Provide proof of compliance with requirements of Underwriter Laboratories (UL). The label of or listing in UL Electrical Construction will be acceptable.

5. The contract for a lightning protection system project, or for any project on a facility containing a lighting protection system, shall require an LPS inspection prior to acceptance. The LPS shall be inspected by a commercial, third-party inspector whose sole work is lightning protection, and shall be certified by this third-party inspector as compliant with AFI 32-1065 and NFPA 780, in that priority order. A UL certification on its own shall not be adequate for acceptance of any Air

Force project. Projects calling for an LPS addition to an existing LPS project shall consider the configuration of the final LPS in the initial design. Projects of this type shall ensure the final

LPS as a whole is compliant with AFI 32-1065 and NFPA 780, in that priority order. The same third-party inspector requirements shall apply.

6. The final inspection report shall include:

a. Location of ground rods;

b. The continuity test of grounding system;

c. The resistance to ground is not in excess of

25 ohms; and

d. Soil condition at the time of taking test.

Contracting Package

Responsible 27 SOCES engineers shall select which study(s) and drawing(s) to be done for each electrical project.

1. Design Analysis - Minimum requirement are follows:

a. Short-circuit and fault calculations study;

b. Voltage (V) drop analysis study;

c. Load calculations for new and existing;

d. Lighting Protection System (LPS) requirement analysis IAW UFC 3-575-

01, Lightning and Static Electricity Protection

Systems, and NFPA 780, Standard for the

Installation of Lightning Protection Systems, Annex L criteria;

e. Coordination study - a minimum of two coordinated ground fault level studies are required for any 480 V system with electric service of 1000 amps or more;

and

f. Foot-candle analysis calculations.

2. Electrical Plans – Accurately scaled showing the following minimum requirements:

a. All exterior electric from switch to pad-mounted transformer to electric service entrance;

b. All communication lines;

c. Conductor and conduit sizes;

d. Reflected ceiling plan;

e. Lighting plan(s);

f. Power plan(s) and panel schedule(s) showing minimum 30% spare space and spare load in each panel;

g. Communication (Voice, data) plan with riser diagram;

h. Fire alarm plan with fire alarm riser diagram;

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Cannon Air Force Base Page 15

i. Details showing grounding, trenching and backfilling, and pad mounted transformers;

j. Poles including grounding and other details;

k. Electric power riser diagram, including wire and conduit sizes;

l. One-line diagram, showing new, existing, the coordination, and at least three fault points;

m. Load calculations and tabulations; and

n. Photometric Plans for external areas verifying compliance with Base Standards and LEED requirements, if applicable.