theoldwizard1 wrote:
I think it is a very ELEGANT solution ! More and more parks now have 50A service so your Y-cable is perfect.
Curious - where are you finding these parks with 50 amp pedestals? The electrical code only requires 20% of a park to be 50 amps so would have to be a high end, casino, gov't or similar park where the owner has voluntarily built above min. code requirements. As of the 2005 NEC, only 5% had to be 50 amps. Just about all CG/RV parks we've been have 50 amps in very short supply and 50 amp RVs are having to use 50/30 amp adapters. 20% is ridiculously low nowadays with so many 50 amp RVs being purchased.
One thing to be aware of when using the 20 amp recept. in a pedestal for a high draw appliance like this for a 2nd AC is that voltage drop could be an issue. The NEC does not provide for both a 20 and 30 amp recept. being used at the same time. Depending on distances from a pedestal to power source, how many other RV-ers are running AC units, and age of a CG and how it was wired, you can end up with low voltage. Low voltage will cause irreversible & cumulative damage to an AC unit.
Use a permanent LED voltmeter inside, either plug-in or wall-mounted. Best is an EMS unit but for two supplies to an RV like this would need two of them for full protection. Just because an AC unit *seems* to start and run okay doesn't mean it's not suffering damage.
All pedestals have a 20 amp GFCI recept. by code. Newer CGs will have loop-fed pedestals which should be much less of a concern for low voltage. If you have less than 105 volts, you should turn them off.
