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i <br /> D. Bussing <br /> 1. All bus bars shall be tin plated copper. Bus sizing shall be based on NEMA standard <br /> temperature rise criteria of 65 degrees C over a 40 degrees C ambient (outside the <br /> ' enclosure). <br /> 2. Provide a half capacity neutral bus where a neutral bus is indicated on the drawings. <br /> ' 3. A copper ground bus shall be furnished firmly secured to each vertical section <br /> structure and shall extend the entire length of the switchgear. <br /> 4. All hardware used on conductors shall be high-tensile strength and zinc plated. All <br /> bus joints shall be provided with bellville washers. <br /> IE. Utility Metering <br /> 1. Furnish a separate barriered-off Utility Metering section complete with hinged <br /> sealable door. Bus work shall include provisions for mounting utility company <br /> current transformers and potential transformers or potential taps as required by the <br /> utility company. Provide Service Entrance UL Label and provide necessary <br /> applicable service entrance features per NEC and PG&E requirements. <br /> 2. Service equipment and meter sockets shall be subject to the approval of the PG&E. <br /> The manufacturer shall be responsible for obtaining Utility approval of the <br /> switchboard. <br /> F. Main Breaker <br /> 1. The main protective device shall be fixed mounted, molded case breaker with 22,000 <br /> amp interrupting. The main breaker shall have a 400 amp trip unit. <br /> 2. The main breaker shall have a hasp for padlocking the breaker in the OFF position. <br /> 2.012 POWER DISTRIBUTION PANEL "PDP" <br /> A. General <br /> 1 1. Furnish a vertical free-standing, dead-front type, distribution switchboard section. <br /> Voltage rating shall be 480 volt, 3 phase, 3 wire. Bus amperage rating shall be a <br /> continuous 400 amps. <br /> ELECTRICAL <br /> 16000 - 35 <br />