Q. A surge protective device (i.e., surge arrester or TVSS) shall be permitted for which of the following? On circuits exceeding 1kV. On ungrounded systems, impedance grounded systems, or corner ...
All references are based on the 2017 edition of the NEC, unless otherwise noted. Each of the conductors shown in the Photo could be used as a grounded conductor in accordance with Sec. 200.6(A).
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