The 2020 Code Making Panel (CMP) has revised the 2017 NEC rules regarding receptacles serving dwelling unit balconies, decks, and porches – specifically, the requirement that an accessible outdoor receptacle must be installed to serve attached balconies, decks, and porches. The revised Code now requires that a receptacle be installed to serve the balcony, deck, or porch when the balcony, deck, or porch is within 4 inches of the dwelling unit. If the balcony, deck, or porch is within 4 inches of the dwelling, the 2020 NEC considers that close enough so that it now requires a general use 120-volt receptacle.
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