Hope I am not repeating here. Searched the forum for topic without success. I should have asked this at the Rally. Looking for input from anyone having experience hooking up to 30 amp using the double 30 amp pigtail whereby you plug one leg to the 30 amp plug and the other to the 15 amp plug using a 30/15 adapter on the pigtail. Hope that is clear. TIA

Those seem to work for some and not others. I understand that it generally doesn't work if the Duplex is a Ground Fault unit.
If on 30 amps we just carefully watch what we're using and do proper power management.

I haven't tried it, but I still don't think you'd be able to run both acs, at least I wouldn't. Also we've been to several parks that don't allow those plugs.

I haven't tried it, but I still don't think you'd be able to run both acs, at least I wouldn't. Also we've been to several parks that don't allow those plugs.

Only in a perfect scenario would it work (at least for a while)

Starting with the Amps of the A/C...15 Amps is average. x2 = 30 Amps. This will depend on a lot of factors including line voltage, connection tightness, wire size and distance.

Those splitters are questionable when it comes to wire size and rated amp loads.

Breakers are designed for an 80% load so by loading 2 A/C's, that would already be violating load capacity. It will still work up to 100% for a short time but Breakers work on Thermal loads (heat - from overloads) and magnetics (from short circuits).

Of course, power plants fluctuate a lot. 10% each way would not be uncommon. So 120 volts could quickly become 108 volts. Lower volts leads to higher amps. You'll trip pretty quick. Especially if you are in a park where others in the park are also running A/Cs.

Then, RV Manufacturers are not under the NEC (National Electrical Code). They have their own standards which are typically worse.

Bottom line??? I would not do it. It can damage your compressors quickly...

We run on a 30amp service all summer. We just watch our amps. If we turn everything else off, we can run both A/C.
We also have a cheater box that plugs each leg into a 30amp plug. We use it when we have no neighbors - it works great.

We run on a 30amp service all summer. We just watch our amps. If we turn everything else off, we can run both A/C.
We also have a cheater box that plugs each leg into a 30amp plug. We use it when we have no neighbors - it works great.

If you don't have one and are willing to take the risks that come with voltage drops by the Utility companies, then at least consider the Progressive Industries Power Surge Protector. If the voltage drops (or rises), then it will drop out your electric and quite possibly save your A/C units while you are not "watching" the meters..

I worked in the Nuclear industry for a number of years. I can tell you that no Utility Company can maintain a 100% constant voltage output. There are too many factors. Demand and temperature swings are among some reasons...Steam Generators take a while to heat up and cool down as demand happens....If another Power Plant is taken off line for some reason (i.e. "trips"), then there is yet another reason for the swings. Most people just don't realize how often this goes on. If the lights are on, then everything must be OK.

Then, there are the parks themselves. If maintenance is not performed, then problems quickly arise there.

I have the Progressive Surge Protector. Even in this park of 25 units, there have been issues. I watch the amps and volts often. They swing wildly.

If you own a rv you absolutely need the surge protector!!
Another thought using the 30/15 cheater, what if the 30 amp breaker tripped then your a.c. tried to start on the 15 amp? Maybe if you are running your fridge & water heater on gas it might work, but it seems it could be an expensive experiment.