Attachment_B_-_D50_Electrical.docx

Farmington Fire Facilities Farmington District Farmington, NM section D50

ELECTRICAL

Part 1 general

SYSTEM DESCRIPTION

This system consists of electrical power distribution, lighting, lighting control, lightning protection, fire detection and alarm, security, and telecommunication.

GENERAL REQUIREMENTS

Determination of electrical system requirements shall be the responsibility of the Design Build Contractor (DBC).

The electrical systems for all structures included in this contract shall be designed to conform to the included BLM Codes and Standards List and those listed below:

National Electrical Contractors (NECA) National Electrical Installation Standards (NEIS), as applicable.

All electrical materials and equipment shall be UL listed.

Design Requirements:

Electrical system voltage drop shall not exceed 4 percent.

Phases shall be balanced with respect to load.

SYSTEM REQUIREMENTS

Enclosures shall meet NEMA Type 1 requirements in dry locations and NEMA Type 3R requirements in wet locations.

All wiring shall be run concealed in all finished spaces.

A megger test shall be performed to determine ground resistance. Ground resistance shall be 25 ohms or less under dry soil conditions.

All conductors shall be copper. Aluminum or copper clad conductors will not be acceptable.

The DBC shall determine the maximum short circuit interrupting rating and withstand ratings of all electrical equipment, including, but not limited to, panelboards and other protective devices provided under this contract. Panelboards, overcurrent protection devices, and other electrical distribution system equipment shall be capable of withstanding and interrupting the maximum available short circuit current (SCC).

Feeder and branch circuit conductors shall be No. 12 AWG minimum.

Maximum number of 20A duplex receptacles per 20A, 120V circuit shall be eight.

Receptacles on opposite sides of common walls shall be offset a minimum of 12 inches on center.

COMPLIANCE VERIFICATION

Specifications, design calculations and drawings shall be submitted during the design process as specified below and as specified in the Design Build Project Scope Paragraph “DB Design Development and Construction Documents”. Compliance with the various codes and design criteria will be determined by a review of the design calculations, specifications, design drawings, construction submittals submitted during construction, and by field inspection. Compliance review is to verify that the DBC is providing systems, products, and/or materials that will satisfy the stated criteria. This review shall not relieve the DBC from responsibility for any errors or omissions nor from responsibility for complying with the requirements of this contract.

SUBMITTALS DURING DESIGN

Electrical Drawings and Specifications: All electrical drawings shall be coordinated with architectural drawings so that scale, dimensions, orientation, grid lines, etc. agree.

DB Design Development Document Review completed to the level specified in the Design Build Project Scope Paragraph “DB Design Development and Construction Documents”.

Drawings: Electrical plans showing locations of all major equipment, fixtures, and devices.

Specifications: Outline specifications.

100% Draft DB Construction Document Review completed to the level specified in Design Build Project Scope Paragraph “DB Design Development and Construction Documents”.

Drawings:

Plans: Power, lighting, grounding, lightning protection, fire detection and alarm, security, and telecommunications system plans, with circuiting arrangements and notation shown.

Enlarged Plans: Enlarged scale electrical plans for mechanical rooms, electrical rooms, and other areas where all of the necessary plan information cannot be conveyed at a smaller drawing scale.

Details: Provide electrical details and sections, including a one-line diagram of the electrical power system.

Schedules: Provide electrical equipment schedule, lighting schedule, and panel schedule(s), cross-referenced to the floor plans.

Specifications: Construction specifications shall be minimally 50% complete.

100% Complete DB Construction Document Review completed to the level specified in Design Build Project Scope Paragraph “DB Design Development and Construction Documents”.

All plans, sections, details, schedules, and specifications shall be complete. All electrical elements shall be coordinated with all other disciplines. Cross-references between sheets shall be complete and accurate. All specifications shall be complete and shall address all electrical work included in the drawings.

Design Analysis/Calculations:

Submit design analysis/calculations for electrical systems in accordance with the Design Build Project Scope Paragraph “DB Design Development and Construction Documents”. The analysis and design of all electrical systems shall be performed in accordance with the design criteria applicable to the project. The calculations shall be clear and concise. All assumptions and references to codes, standards, criteria, drawings, and computer outputs shall be noted. At a minimum, electrical load summary, fault current analysis, arc flash analysis, lightning protection, and lighting power density calculations shall be submitted to the Government for review and approval.

SUBMITTALS DURING CONSTRUCTION

Submit the following for review and approval in accordance with the Design Build Project Scope Paragraph “Submittals During Construction”.

Manufacturer’s Catalog Data:

Wire and cable.

Wiring devices.

Outlet and junction boxes.

Conduit and raceway.

Fire alarm system.

Operation and Maintenance Data:

Fire alarm system.

Security system.

SUBMITTALS UPON CONSTRUCTION COMPLETION

Submit as-built versions of alarm system drawings.

PART 2 SYSTEM COMPONENTS

D5010 - ELECTRICAL SERVICE AND DISTRIBUTION

Labeling: All panels shall be labeled in accordance with the NEC and shall include the following information and labels at minimum:

Panel Tag/Name Source/Feeder Circuit Voltage, Phases, and Main Circuit Breaker and Bus rating Available Fault Current All disconnects shall be labeled to indicate function and source circuit.

Conduit: Unless otherwise noted, the following raceways should be used in the associated applications. Provide grounding bushings where conduit terminates at concentric knockouts. Utilize EMT for all other building conduit as permitted by code and FMT for appliance connections as permitted by code. Utilize PVC for all underground installations. Basket and cable try raceways shall only be used within the IT room.

Wiring: Copper wire, with THHN/THWN insulation.

D5020 - LIGHTING AND BRANCH WIRING

Wiring: MC cable with copper conductors where not exposed or visible is acceptable. All other wiring shall be in conduit (flexible metal lighting whips <6’ length are acceptable where concealed).

Outlet and Junction Boxes: Provide galvanized sheet metal boxes for each outlet, switch, receptacle, or combination, and for each junction point.

Receptacles: UL 498, specification grade receptacles. Ground-fault circuit interrupter (GFCI) receptacles shall comply with UL 943. Receptacles shall be provided as required by NEC, shall be provided at minimum spacing per A210.52(A)(1), and at a minimum as specified below:

Ground-fault circuit interrupter (GFCI) receptacles shall comply with UL 943. All receptacles within rooms containing sinks, water faucets, or in NEC defined wet locations shall be GFCI type. All other receptacles, other than those feeding sensitive motor equipment or receptacles dedicated to specific equipment, shall be fed from a GFCI type breaker.

D5030 - FIRE DETECTION AND ALARM

General: Microprocessor-based, addressable, and programmable fire detection and alarm system. System shall monitor all initiating circuits and supervisory circuits including those for fire sprinkler flow switch and valve tamper switches. System shall be capable of transmitting system status to a central station via the public switched telephone network – separate systems for each of the Crew Quarters and Fire Station buildings.

Fire Alarm Control Panel: Modular type installed in steel cabinet with hinged doors and cylinder lock. Battery backup, alarm silence.

Fire Detection Devices:

General: Each fire detection device shall have a unique address. Activation of any manual station, smoke detector, or fire sprinkler system flow switch shall cause building alarm notification devices to activate and shall initiate the fire alarm remote reporting system. Activation of the fire sprinkler valve tamper switches shall initiate a dedicated supervisory alarm (trouble alarm).

Smoke Detectors: Photoelectric type smoke detectors.

Pull Stations: Manual pull stations.

Fire Sprinkler Flow Switch: Section D40.

Fire Sprinkler Valve Tamper Switches: Section D40.

Fire Alarm Notification Devices: Fire alarm notification devices shall be both audible and visible (horn/strobe).

Remote Annunciator Panel: Remote annunciator panel fire alarm zone description shall correspond to the fire alarm control panel zone descriptions. Annunciator panel shall be capable of alarm silence and reset functions by operation of a keyed switch; the annunciator panel keys shall match the fire alarm panel cabinet keys. Annunciator panel communication shall be communicated over wireless, cellular signal.

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SECTION D50

ELECTRICAL PAGE 2