transformers, electronic power supplies, and Class 2 power sources shall be permitted to be located in attics and soffits, provided there is an access door at least 900 mm × 562.5 mm (36 in. × 22-1⁄2 in.) and a passageway of at least 900 mm (3 ft) high × 600 mm (2 ft) wide with a suitable permanent walkway at least 300 mm (12 in.) wide extending from the point of entry to each component. At least one lighting outlet containing a switch or controlled by a wall switch shall be installed in such spaces. At least one point of control shall be at the usual
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point of entry to these spaces. The lighting outlet shall be provided at or near the equipment requiring servicing. (F) Suspended Ceilings. Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be permitted to be located above suspended ceilings, provided that their enclosures are securely fastened in place and not dependent on the suspendedceiling grid for support. Ballasts transformers, and electronic power supplies installed in suspended ceilings shall not
Sign Builder Illustrated // May 2014
be connected to the branch circuit by flexible cord. Comment: The title was rearranged and “Class 2 power sources” was added. The other sections above were cleaned up to reflect these changes. Please note that Class 2 is now “sources” not “supplies;” this change includes the other power equipment available today.
600.32 NEON SECONDARY-CIRCUIT WIRING, OVER 1000 VOLTS, NOMINAL. (A) Wiring Methods.
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