Attachment 1: Specifications - Metropolitan Washington Airports ...

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DCA TERMINAL A IMPROVEMENTS (NEAR TERM) 10 AUGUST 2012 TASK ORDER 03: LOBBY IMPROVEMENTS – PKG 4 -CURBSIDE CHECK-IN RONALD REAGAN WASHINGTON NATIONAL AIRPORT PROJECT DT1203 PART 3 - EXECUTION 3.1 INSTALLATION A. Comply with NECA 1, including the mounting heights listed in that standard, unless otherwise noted. B. Coordination with Other Trades: 1. Take steps to insure that devices and their boxes are protected. Do not place wall finish materials over device boxes and do not cut holes for boxes with routers that are guided by riding against outside of the boxes. 2. Keep outlet boxes free of plaster, drywall joint compound, mortar, cement, concrete, dust, paint, and other material that may contaminate the raceway system, conductors, and cables. 3. Install device boxes in brick or block walls so that the cover plate does not cross a joint unless the joint is troweled flush with the face of the wall. 4. Install wiring devices after all wall preparation, including painting, is complete. C. Conductors: 1. Do not strip insulation from conductors until just before they are spliced or terminated on devices. 2. Strip insulation evenly around the conductor using tools designed for the purpose. Avoid scoring or nicking of solid wire or cutting strands from stranded wire. 3. The length of free conductors at outlets for devices shall meet provisions of NFPA 70, Article 300, without pigtails. 4. Existing Conductors: a. Cut back and pigtail, or replace all damaged conductors. b. Straighten conductors that remain and remove corrosion and foreign matter. c. Pigtailing existing conductors is permitted provided the outlet box is large enough. D. Device Installation: 1. Replace all devices that have been in temporary use during construction or that show signs that they were installed before building finishing operations were complete. 2. Keep each wiring device in its package or otherwise protected until it is time to connect conductors. 3. Do not remove surface protection, such as plastic film and smudge covers, until the last possible moment. 4. Connect devices to branch circuits using pigtails that are not less than 6 inches in length. 5. When there is a choice, use side wiring with binding-head screw terminals. Wrap solid conductor tightly clockwise, 2/3 to 3/4 of the way around terminal screw. 6. Use a torque screwdriver when a torque is recommended or required by the manufacturer. 7. When conductors larger than No. 12 AWG are installed on 15- or 20-A circuits, splice No. 12 AWG pigtails for device connections. 8. Tighten unused terminal screws on the device. WIRING DEVICES 26 27 26 - 4
DCA TERMINAL A IMPROVEMENTS (NEAR TERM) 10 AUGUST 2012 TASK ORDER 03: LOBBY IMPROVEMENTS – PKG 4 -CURBSIDE CHECK-IN RONALD REAGAN WASHINGTON NATIONAL AIRPORT PROJECT DT1203 9. When mounting into metal boxes, remove the fiber or plastic washers used to hold device mounting screws in yokes, allowing metal-to-metal contact. E. Receptacle Orientation: 1. Install ground pin of vertically mounted receptacles up, and on horizontally mounted receptacles to the right. F. Device Plates: Do not use oversized or extra-deep plates. Repair wall finishes and remount outlet boxes when standard device plates do not fit flush or do not cover rough wall opening. G. Dimmers: 1. Install dimmers within terms of their listing. 2. Verify that dimmers used for fan speed control are listed for that application. 3. Install unshared neutral conductors on line and load side of dimmers according to manufacturers' device listing conditions in the written instructions. H. Arrangement of Devices: Unless otherwise indicated, mount flush, with long dimension vertical and with grounding terminal of receptacles on top. Group adjacent switches under single, multigang wall plates. I. Adjust locations of floor service outlets and service poles to suit arrangement of partitions and furnishings. 3.2 IDENTIFICATION A. Comply with Section 26 05 53 "Identification for Electrical Systems." 1. Receptacles: Identify panelboard and circuit number from which served. Use hot, stamped or engraved machine printing with black-filled lettering on face of plate, and durable wire markers or tags inside outlet boxes. PART 4 - CONTRACTOR’S QUALITY CONTROL REQUIREMENTS 4.1 GENERAL A. Comply with applicable provisions of Division 01 Section “Quality Requirements” for requirements for Contractor Quality Control Program. B. Source Limitations: Obtain each type of wiring device and associated wall plate through one source from a single manufacturer. Insofar as they are available, obtain all wiring devices and associated wall plates from a single manufacturer and one source. C. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use. WIRING DEVICES 26 27 26 - 5
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