2008-276 D - Laserfiche WebLink

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B. Buses 1. Bus bars for the mains shall be of tin plated copper. Full size tin plated copper neutral bars shall be included. Bus bar taps for panels with single pole branches shall be arranged for sequence phasing of the branch circuit devices. Bussing shall be braced throughout to conform to industry standard practice governing short circuit stresses in panelboards. Phase bussing shall be full height without reduction. Cross connectors shall be tin plated copper. Each panel shall be provided with a ground bus bar, with removable link/jumper between neutral and ground bus. The ground bus shall be sized to the maximum number of circuit breakers that can be installed in the panelboard. 2. Neutral bussing shall have a suitable lug for each outgoing feeder requiring a neutral connection. 3. Spaces for future circuit breakers shall be bussed for the maximum device that can be fitted into them. 4. Tin plated copper equipment ground bars shall be furnished. C. Boxes 1. Recessed or flush mounted boxes shall be made from galvanized code gauge steel having multiple knockouts, unless otherwise noted. Boxes shall be of sufficient size to provide a minimum gutter space of 4 -in on all sides. 2. Surface mounted boxes and trims shall have an internal and external finish as specified in Paragraph 2.04D4 below. 3. At least four studs for mounting the panelboard interior shall be furnished. 4. All conduit entrances shall be field punched. D. Trim 1. Hinged doors covering all circuit breaker handles shall be included in all panel trims. 2. Doors shall have semi flush type cylinder lock and catch, except that doors over 484n in height shall have a vault handle and 3 -point catch, complete with lock, arranged to fasten door at top, bottom and center. Door hinges shall be concealed. Furnishtwo keys for each lock All locks shall be keyed alike; directory frame and card having a transparent cover shall be furnished on each door. All trims shall be door-inAoor type construction. 3. The trims shall be fabricated from code gauge sheet steel. 4. All exterior and interior steel surfaces of the panelboard shall be properly cleaned and finished with ANSI 255.1, No. 49 or 61 light gray paint over a rust inhibiting phosphatized coating. The finish paint shall be of a type to which field applied paint will adhere. 5. Trims for flush panels shall overlap the box by at least 3/4 -in all around. Surface mounted panel trims shall have the same width and height as the box. Trims shall be fastened with 044572017 16470-2