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(in) All current transformer installations shall be color coded as follows with minimum wire size of #12: 2 red, 2 black, 2 yellow, and I white common, with number four (4) copper wire to an approved ground. Section 26. COMMERCIAL CONSTRUCTION. (a) The sub -feed to each store must provide at least three - wire, single-phase current or four -wire, three-phase current of 60 ampere capacity, and the conductor size shall be not less than No. 4. The conduit raceway shall be not less than one and one-fourth inch trade size. (b) The sub -feeder to each store must be protected in the meter room with an approved indicating -type of circuit -breaker or a fused switch of not less than 60 ampere capacity, capable of properly fusing No. 4 conductors to main switch on panel in each store. (c) Color Code. On all multi -wire, lighting branch circuits, color code will be required In compliance with sections 210.4 and 210. 5 of the National Electrical Code. Switch legs will be considered as the hot wire of the circuit, and must be of the samo color as the circuit, except three and four-way travelers may be of different color. (d) Convenience outlets per circuit: Beauty parlors, etc- -------------------------- 2 maximum Barbershops ----------------------------------3 maximum Medical, dental and similar offices ------------- 3 maximum Store show window (for spot lights) ------------- 4 maximum Store show window (at 'floor)-------------------- 6 maximum Display areas In retail stores------------------ 6 maximun) School Classrooms --------------------------- 6 maximum Office Space --------------------------------- 4 maximum Storage Space-------------------------- ----- 8 maximum (e) The maximum number of Mogul base light sockets shall not exceed three per 15 ampere circuit, or four per 20 ampere circuit. No conveniences receptacle shall be permitted on a branch circuit supplying Mogul base light sockets. The conductors for Such circuits shall be not less than No. 12. 24