installed in power plants in accordance with the plans: a. Primary Distribution switchgear for Plant "4B" shall consist of three oil circuit breaker feeder cubicles and & ground detector in accordance with Specification HN-6B-303, b. and primary wiring shall be provided as shown. Primary '4n", "hE", and "AB", “EL” Feeders originating in Plants "4c", shall be provided with fused protection. ec. Station service transformer banks for plants d. Secondary Feeders in all plants. e. Secondary switchboards, "aot, “HET, and "Oy" ; panelboards, and all branch circuit wiring to motors, heaters, all miscellaneous power equipment, enah and receptacles. switchboard for plant The secondary B "shall be in accordance with Specification No. HN-6B-303. f. Control wiring. 15-13. See applicable portion of Section 16 of these 15-14. The trades foremen and other supervisory personnel specifications for interior wiring. which the Government, through its representative, the Engineer, furnishes, shall be experienced in constructing similar plants with similar equipment. OVERHEAD AND UNDERGROUND DISTRIBUTION SYSTEMS: 15-15. The primary system to be used will be three wire, 15-16. The secondary systems to be used will be one of 2300 volts, 60 cycles. the following; as indicated on the plans: a. Four wire, three phase, 210/208 volt wye, or b. Three wire, three phase, 240 volt, delta, or ec. Four wire, three phase, 240 volt, delta, with ad. Three wire, single phase, 120/240 volt. neutral teaser in one phase for 120/240 volt service. 15-3