My customer has a private (family and friends - no rentals) RV park - for use by family and friends during the summer - seasonal only. The site has provisions for 3 campers, complete with septic hook-up.
He asked me to upgrade the 3 20A 120v GFCI outlets to 30A. Not having a copy of the 2011 NEC with me, I called the State Inspector to get a reading on the requirements. He referenced me to 551 III - 551.40 (C) and said they must be GFCI protected.
I ordered the GFCI's (special order with my supply house, and Square D doesn't make a single pole Homeline 30A GFCI, so I had to convert the panel to Square D QO). Swap went fine, with 30A 120 "RV" receptacles. Then the campers started arriving, and every one of them tripped the 30 A GFCI breakers! My cost for the QO GFCI's is $68.00 - expect a customer dispute.
I believe my State Inspector was wrong. 551.40 (C) references the requirements for inside the RV; 551 VI 551.71 references RV Parks, and the only mention there is for GFCI protection on 15 and 20 amp circuits; references to 30 A and 50 A do not mention GFCI protection. 551.71 also proscribes that I must have some 50 A receptacles as I have 3 sites....
QO 30A GFCI's trip at 5 ma, and these campers have air conditioners and refrigerators, which have capacitors on the motors, and over time they leak......
Any comments or guidance here?
Thanks guys (and gals).
Grov
