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Showing content with the highest reputation on 10/02/2018 in all areas

  1. Disconnecting change in section 600.6 of the NEC 2017 Biggest change is labeling. Also if you service a sign, you must verify and label for compliance (A) Location The disconnect shall open all ungrounded conductors where it enters the enclosure of the sign or pole. Exception No. 1: A disconnect shall not be required for branch circuit(s) or feeder conductor(s) passing through the sign where enclosed in a Chapter 3 listed raceway or metal-jacketed cable identified for the location. Exception No. 2: A disconnect shall not be required at the point of entry to a sign enclosure or sign body for branch circuit(s) or feeder conductor( s) that supply an internal panelboard(s) in a sign enclosure or sign body. The conductors shall be enclosed in a Chapter 3 listed raceway or metal-jacketed cable identified for the location. The warning label shall comply with 110.21(B) and state the following: “Danger. This raceway contains energized conductors.” The marking shall include the location of the disconnecting means for the energized conductor(s). The disconnecting means shall be capable of being locked in the open position in accordance with 110.25. (2) Within Sight of the Sign A permanent field-applied marking identifying the location of the disconnecting means shall be applied to the sign in a location visible during servicing. The warning label shall comply with 110.21(B) (B) Control Switch Rating They added: electronic power supplies to be rated at 200% of load .
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