mbednarik
Member
- Location
- central iowa
- Occupation
- Electrician
It has been a common installation in the past to run a feeder sized to the demands calculated in Art 551 to multiple RV pedestals. Example 250 AL URD feeding 6 pedestals each with a 50/30/20 amp receptacle(s). Protect the feeder as required (200 amp in this example) and connect the the factory feed through lugs in the pedestal. The loop lugs which I have seen from Midwest have a typical rating of 250 amps. Then factory installed conductors to a main lug integrated panel with factory installed circuit breakers for each receptacle in the assembly, no main OCPD. The label gives typically a 100 or 125 amp rating. Article 408 for panelboards guide us to protect a panelboard with in its rating, but these are listed to UL 231 for power outlets, not UL 67 for panelboards. The end of UL 231 Annex A references UL 67 though. Nothing in Art 551 negates the requirement of Art 408. From a NEC/UL standpoint do these MLO power outlets require protection within their ratings? The cloudy part comes from the 250 amp loop rating and the remaining portion of the power outlet being factory assembled and listed.