(A) Support. Portable or mobile signs shall be adequately supported and readily movable without the use of tools.
(B) Attachment Plug. An attachment plug shall be provided for each portable or mobile sign.
(C) Wet or Damp Location. Portable or mobile signs in wet or damp locations shall comply with 600.10(C)(1) and (C)(2).
(1) Cords. All cords shall be junior hard-service or hard service types as designated in table 400.4 and have an equipment ground.
(2) Ground-Fault Circuit Interrupter. In addition to the requirements of 210.8, the manufacturer of portable or mobile sighs shall provide listed ground-fault circuit-interrupter protection for personnel. The ground fault circuit interrupter shall be an integral part of the attachment plug or shall be located in the power supply cord within 12in of the attachment plug.
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