Regulating the Erection, Construction, Repair, Alteration, Location of all Electric Signs

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(F) LOAD OF BRANCH CIRCUIT. Circuits shall be so arranged that the number of outlets, lamps and transformers connected to them, shall in no case place more than 12 amperes on a branch circuit. (G) MARKING. Transformers shall be marked with the input rating in amperes of volt - amperes, the input voltage and the open - circuit high tension voltage. (H) ENCLOSURES. Enclosures for outline lighting shall conform to the followings 1. CONIXICTORS AND TERMINALS. Cabinets and outline troughs shall have conductors and terminals, except the supply leads, enclosed. 2. CUTOUTS, FLASHERS, ETC. Cutouts, flashers and similar devices, shall be in a separate compartment. They shall be enclosed in approved metal boxes, the doors of which shall be arranged so that they can be opened without removing obstructions or finished parts of the enclosure. 3. ENCLOSURE EXPOSED TO THE WEATHER. Enclosures for outside use shall be weatherproof and shall have an ample number of drain holes, each not larger than V2 inch or smaller than 1/4 inch. Wiring connections shall not be made through the bottoms of enclosures exposed to the weather unless the enclosures are of the raintight type. 4. MATERIAL. Outline lighting shall be constructed of metal or other non- combustible material. Wood may be used for external decoration if placed at least 2 inches from the nearest lampholder or current - carrying part. 5. STRENGTH. Enclosures shall have ample strength and rigidity. 6. THICKNESS OF METAL. Sheet copper shall be at least 20 ounce (0.028 inch). Sheet steel may be of No. 28 USS gauge (.0149 inch) except that for outline lighting sheet steel shall be of No. 24 USS (.0239 Inch), unless ribbed, corrugated or embossed over its entire surface, when it may be of No. 26 USS gauge (.0179 inch). 7. PROTECTION OF METAL. All metallic parts of enclosures shall be gal- vanized or otherwise protected from corrosion. - 21 -