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Bus bars: 98% conductivity copper of the capacity indicated, and arranged for <br />operation at voltages and phase scheduled. <br /> <br />Interior arrangement: So arranged that individual circuit breakers can be removed or <br />installed without disturbing adjacent units, bus structures, or insulation. Refer to Panel <br />Schedule for number of branches, main and branch circuit sizes, poles and trip ratings. <br /> <br />Spares and spaces: Space positions complete in all respects, ready for future load <br />wiring. Space positions as indicated shall be completely bussed and ready for the <br />future insertion of the circuit breaker. <br /> <br />2.18 <br /> <br /> A. <br /> <br />Overcurrent elements: <br /> <br />Circuit breakers: Bolted type, quick-make, quick-break temperature compensated <br />thermal magnetic trip, with frame size, poles, trip rating and minimum rms <br />interrupting rating as indicated and scheduled. <br /> <br />Include a separate ground bus bar in all panels. <br /> <br />Identification: Include manufacturer's nameplate and Underwriters Laboratories, Inc., <br />inspection label on interior of cabinet. For branch circuit panel identify each circuit <br />protective device by typewriiten directory of permanent number referenced to circuit <br />location load directory on interior of cabinet door. Equip distribution panelboards with <br />individual white letter, black plastic laminated identification plates for each circuit <br />protective device. <br /> <br />Wiring gutter: Provide all around interior perimeter. Cross section dimension of gutter <br />as required by code but not less than 16 square inches, or as required to include a total <br />cross section such that indicated circuit conductors and future conductors, based upon <br />spaces indicated, will not exceed in total cross sectional area 30% of the gutter area. <br /> <br />Panelboard height: Do not exceed 78 inches except that floor standing panelboards <br />may be 90 inches high providing top operating handle is within 6 feet of floor. <br /> <br />Bussing arrangement: Refer to schedules for voltage and phase of individual <br />panelboards. Equip line and neutral bus with lugs to accept feeders indicated. Connect <br />circuit protective devices to main bussing arranged for sequenced phasing. <br /> <br />POWER DISCONNECT SWITCHES <br /> <br />Provide power disconnect switches having product construction requirements as <br />specified and/or indicated. Where not otherwise indicated, the following requirements <br />apply: <br /> <br />BASIC MATERIALS AND METHODS 16050-13 <br /> <br /> <br />