Underwater luminaires are listed and shock-safe; those above the low-voltage limit get GFCI for relamping, and those needing submersion are protected from overheating (NEC 680.23(A)).
Indoors, lights and fans may be lower if totally enclosed (fans rated for porches), GFCI-protected and at least 7 ft 6 in above the water (NEC 680.22(B)(2)).
Wiring Methods on Supply Side of Class 2 Power Source
Supply-side wiring follows Chapters 34 to 41 with overcurrent protection of 20 A max; transformer input leads may be under 14 AWG if 12 in or shorter, 600 V insulated, and never under 18 AWG (NEC 725.127).
Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.
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