Attachment 5- MACC Electrical Standard Requirements 2019.pdf

MACC

Attachment 5

Electrical Standard Requirements

12/2019

INTRODUCTION:

MACC STANDARD ELECTRICAL REQUIREMENTS: This section provides requirements and guidance associated with electrical distribution work performed on Joint Base Andrews (JBA) and Joint Base Anacostia-Bolling (JBAB). The MACC Architectural Compatibility Plan shall be used in conjunction with this document.

I. GENERAL

1. Existing Systems Over 600 Volts, Nominal:

a) Main Base Overhead and Underground is medium voltage: 7,600/13,200 Volts Delta

b) Underground

c) Airfield lighting vault – 2300 Volts

d) Davidsonville transmitter site and bldg. 1558 – 4160 Volts

e) All Other – 7,600/13,200 Volts Delta Note: 4160 Volt system will likely be replaced with a 480/277 system during the performance of this contract.

f) Systems under 600 Volts, nominal, low voltage, are WYE secondary

II. Wiring Methods

1. Electrical Manholes

a) Medium voltage manholes shall be minimum size 6 ft. width x 6 ft. depth x 8 ft. length. Low voltage manholes shall be 4 ft. width x 4 ft. depth x 4

ft. length.

b) A sump and ground rod hole shall be in each manhole.

c) Pulling eyes shall be on all four (4) walls of a manhole.

d) Concrete walls shall be 6 inch thick with 5/8 inch rebar.

e) Distance between manholes; minimum 400 ft., maximum 500 ft. Note:

Exceptions must be approved by a base electrical engineer on a case-by-case basis.

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f) No T-splices or tape splices allowed in manholes. All other T-Splices must be approved by a base electrical engineer on a case-by-case basis.

2. Duct banks

a) All primary and secondary feeders shall be installed in duct banks.

b) All medium voltage duct banks shall be minimum schedule 40 PVC, 5 inch in diameter conduits and encased in concrete; inside 4 inches of concrete on top, 3 inches on the sides and 3 inches on the bottom.

c) All primary feeder duct banks shall have a minimum of two spare conduits installed.

d) All primary feeder duct bank shall have a minimum of one spare conduit when installing a new transformer – from manhole to transformer.

e) All secondary feeders shall be in schedule 40 or 80 PVC conduit.

f) All secondary feeder duct banks that are bored under roadways shall have at least one spare duct installed. If not bored, feeder shall be in ridge conduct sleeves.

g) Do not direct bury secondary lines in the same trench as a primary feeder.

h) Temporary Feeders: Temporary feeder duct banks (90 days or less) do not need to be concrete encased, but shall be minimum 4-inch, schedule 80 conduit. Temporary feeders must receive approval from the electrical utilities activity management planners (AMP) in the CE Resource Optimization (R&O) section. Exceptions (Temporary feeders without concrete installed longer than 90 days) must be approved by the Resource Optimization electrical utilities AMP.

III. Materials and Protection

1. Medium Voltage Cable All materials and distribution shall conform to UFC 3-550-1 Exterior Electrical Power Distribution and UFGS 33 71 02 Underground Electrical Distribution.

a) All cables shall be rated for 15 KV, with copper conductor, 133% EPR insulation and copper tape shielded or full concentric neutral construction with outer polypropylene jacket. Cable shall come with length marking

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b) All cables shall be tagged with easily readable labels for identification in every manhole.

c) Number 2, 2/0, 4/0 and 350 kcmil shall be used on JBA and JBAB – medium voltage.

d) Primary feeders between Feeder Switchgear.; and Feeder Switchgear.

and the substation, will be no less than 4/0 EPR without approval by a base electrical engineer on a case-by-case basis.

e) All in-line splices and splicing method must be approved. The splicer must have at least two years of splicing experience. Approved type in-line splices shall be wrapped independently with flame retardant, heat resistant tape, the portion of cable not containing a splice may be taped bundled together.

2. Feeder Switchgear.

a) Only use S&C Vista Gas Feeder Switchgear. or equal.

i. Some Suggested Distributers:

ii. United Electric Supply

iii. Maurice Electric

iv. Lighthouse Electric

b) All Feeder Switchgear. will rated for 15 KV, 14.4 Nominal

c) Feeder Switchgear. shall have minimum 9.5 KV surge arrestors

d) Where new facilities or radials are constructed, Feeder Switchgear. shall be installed to feed that facility from the pad-mounted switch.

3. Switchboards and Panel boards

a) All switchboards and panel boards shall have a main breaker with copper buses.

b) All switchboards/switchgear shall be equipped with power logic equipment.

c) Pad for Electrical Equipment.

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d) All outside pads shall be 6-inch minimum high and 6-inch minimum overhang.

e) All internal pads shall be 4 inch minimum high and same size as equipment

f) Over-current Protection: All incoming services shall have one main disconnect per feeder.

4. Grounding and Bonding

a) Refer to the latest edition of the IEEE Green Book

b) Use ¾ inch x 10 foot copper clad grounding rods

c) Medium voltage ground, over 600 volts shall be #6 AWG or larger medium soft drawn solid copper wire with exothermal weld connectors.

IV. Equipment for General Use (Non-Airfield Lighting) Shall conform to UFC 3-530-01 Interior and Exterior Lighting Systems and UFGS 26 20 00

Interior Distribution System.

1. Non-Airfield Fixture Wires

a) All wire #10 AWG and under shall be a solid wire, not stranded.

b) Color Coding of all wires shall be in accordance with the National Electric Code (NEC)

c) Wiring method shall be parallel, not series.

2. Interior & Exterior Lighting Fixtures

a) LED is a preferred technology for all new fixtures unless otherwise noted depend on the lighting design requirement. All fixture luminaires must be approved for uniformity, aesthetic reasons and energy efficiency including color temperature, color rendering index (CRI), control system, diffusion, and glare.

b) New ceiling grid lighting fixtures preferred to be LED. For uniformity, all fixtures in a room or area all other older technology lights shall be replaced with LED unless otherwise noted based on design requirement.

c) All lighting fixtures shall be in compliance with ETL12-4 (latest version)

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d) All lighting system shall be equipped with required control system include not limited to dimming system, day light and occupying sensor per design requirement.

e) The LED lighting installation contract should include a minimum ten-year on-site replacement warranty as required by ETL 12-4.

f) LED lights shall have a color rendering index (CRI) equal to or greater than 80 LED light power supplies should have a minimum efficiency of 85%, total current harmonic distortion (THD) less than or equal to 20% and a power factor equal to or greater than 0.90. Drivers shall be dimmable and compatible with standard dimming control circuits. Project design should consider the installation of integrated occupancy/vacancy sensors as well as daylighting controls for automatic dimming in response to available daylight.

g) Quartz and parabolic lamps shall not be used.

3. Street Lighting

a) Street and parking lot lights fixture shall be LED and must be in compliance with the existing base wide upgraded lighting system and also all of the above mentioned for exterior lighting requirement.

b) All fixture type shall be approved on a case-by-case basis for energy efficiency requirement to ensure aesthetic uniformity for surrounding area, street or parking lots.

c) All street lights shall be equipped with an in-line fuse link at the base of each pole.

d) Light poles shall be aluminum and tobacco brown in color in accordance with the Joint Base Andrews Architectural Compatibility Plan.

e) Lighting pole base shall extend 3 ft. above grade in traffic areas. All other areas base shall be 1 ft. above grade.

f) Photo cells, dimming system, daylight sensor, occupying sensor and all control system shall be installed and adjust per design and security requirement.

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g) Street lights that cannot be accessible by bucket truck by a paved surface must be collapsible or have the ability to be serviced from the ground.

4. LED design requirements:

UFC 1-200-01 – General Building Requirements UFC 1-200-02 – High Performance and Sustainable Building Requirements UFC 3-530-01 – Interior and Exterior Lighting and Controls AFI 32-1036 – Electric Power Systems ETL 11-29 – Use of LED Fixtures in Airfield Lighting Sys.

ETL 12-4 – LED Fixture Design and Installation Criteria UL 1449 – Surge Protective Devices, 3rd Edition

5. Qualifications and Equipment for Airfield Lighting.

a) Airfield lighting installer and designer must have at least 2 years of experience with FAA or U.S military's Unified Facilities Criteria (UFC) compliant airfield pavements and lighting standards and guidance. We recommend using UFC 3-535-02, DESIGN DRAWINGS FOR VISUAL AIR NAVIGATION FACILITIES (DRAFT) as a design and installation guide if unfamiliar with UFC standards. It can be requested from JBA engineers or found on the internet. Work shall always comply with UFC

3-353-1, VISUAL AIR NAVIGATION FACILITIES.

b) Work and design standards are set in UFC 3-535-01 and quality and technology standards are set to ADB manufacturing standards or approved equivalents. Deviations shall only be approved by JBA engineers and Airfield Lighting Electricians.

c) Airfield Wire, connector, Counterpoise, and Transformers:

i. Transformer: L-830-17 20/25 watt 6.6A/6.6A ADB P/N 35A061 or approved equivalent for LED taxiway fixture.

ii. Cable: FAA L-824 type C, #8 copper,7 strand, XLP, unshielded

iii. Connector: FAA L-823 Lighting cable connector.

d) Taxiway Edge Lighting Fixtures

i. ADB L-861T LED Elevated Taxiway Edge Light or approved equivalent with arctic option.

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ii. Consult project manager for distance of installation from taxiway edge.

iii. Taxiway light Can Bases are allowed to be installed in place with prefabricated concrete surrounding the base to anchor.

iv. All cans shall drain to daylight or to an adjacent can that eventually drains to daylight, storm sewer or underdrain.

e) In-Pavement Lighting and Light Base.

i. ADB Airfield Solutions lighting or approved equivalents.

Always require military approved types from manufacturer.

ii. Base Cans shall be installed in concrete poured in place and not in pre-fabricated concrete.

iii. All cans shall drain to daylight or to an adjacent can that eventually drains to daylight, storm sewer or underdrain.

iv. Light Fixture Examples

PRODUCT NUMBER DESCRIPTION:

44A6248/2210 MILITARY WHITE APPROACH STRAIGHT

44A6248/3210 MILITARY APPROACH RED STRAIGHT

44A6248/4210 MILITARY THRESHOLD GREEN STRAIGHT

44A6247/1122 L850D GREEN ST, RED ST, W/O FD, 2CD

2512/20CDE L868B Light Base w/ TYPE B ADPTR 17-3/8 DIA.

f) Airfield Signs

i. Distance remaining sign: ADB Size 3, LED L-858B Distance Remaining Internally Illuminated Sign or approved equivalent.

ii. Taxiway and Runway Signage: ADB Size 3, LED, L-858R, L-858Y, L-858L, or approved equivalent with two tethers minimum per sign.

iii. Concrete foundation pads shall be flush with grade.

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6. Generators:

a) Generators

i. Generators in Maryland require state air permits to operate if they generate more than 373 kilowatts. The installing contractor shall be responsible for permitting and any associated fees.

ii. Generators 60kW and above shall have external fuel tanks.

Integrated fuel tanks on smaller units shall be approved on an individual basis by the power production activity manager in the CE Resources and Optimization section.

iii. All fuel storage tanks shall comply with base environmental standards.

iv. Concrete pads shall have a 2 ft overhang at ground level.

v. All generators shall use diesel fuel #2 (DF2)

vi. Mufflers shall be painted with rust proof paint, tobacco brown in color in accordance with the Joint Base Andrews Architectural Compatibility Plan.

vii. All generators shall be Caterpillar or Onan name brands. Any other brand must be approved by Resources and Optimization (R&O) section electrical power production activity management planners (AMP).

b) Automatic Transfer Switch (ATS)

i. All permanently installed generators shall be equipped with an

ATS.

ii. A maintenance bypass switch shall be installed on every ATS.

iii. All ATS’s shall be four-pole.

7. Transformers

a) All single and three phase transformer shall comply with the United Facility Guide Specification, Section 16272.

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b) All transformers shall be provided with a manufactures equipment specification sheet.

c) Ensure dry transformer are not installed outdoors unless protected from rain.

d) Manufacturers

i. Use Cooper, or ABB single/three phase transformers. Inform the project manager if any other brands are being considered.

Suggested Distributors:

(1) United Electric

(2) Bradley Electrodes

(3) Lighthouse Electric

ii. Aluminum windings are acceptable.

iii. All Transformer shall be dead front with 200-ampere load break elbows, 4-position, T-blade switch and dry-type canister fuses, and form 9S meter cabinet on the side with current transformers and fuse block inside.

iv. Transformer pad shall have open centers for Primary & Secondary compartments.

v. For indoor: Use dry type transformer for low voltage

vi. For outdoor: Use oil-cooled type transformer

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