Code Q&A

Q. Can Table 310.15(B)(6) be used to size service conductors to a duplex, where there is no firewall separating the units?

A. No. Table 310.15(B)(6) only allows a reduced-size service and feeder conductors for individual dwelling units of one-family, two-family, and multi-family dwellings meeting the requirements of 310.15(B)(6). However, the main power feeder conductors to each dwelling unit can be sized using Table 310.15(B)(6).

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