Only thing getting power is the 220V Appliance!?

[jeff_1981]

Hey electrical geniuses out there, I need your help. I know next-to-nothing about electrical. Maybe the answer is something simple. Either way, I don't know it, and I need some guidance, big time.

Wife and I are starting a mobile coffee and pastries business. Had an older camper fixed up. Looks great. Tried hooking it up to the generator today for the first time...and I'm perplexed. At first I thought nothing got power, but actually the 220V, 4000W, 20A espresso machine is the only thing that switches on. No other equipment or outlets work.

The generator is a Champion 8750 Watt Inverter, Model 100520. The plug going into the Camper is a big 4-Prong (I assume a 50A?). For the part going to the generator, I had to use a 30 Amp Generator 4 Prong to RV30 Amp Adapter cord I got from Home Depot.

I turn on the generator fine, I plug it in to the camper, and nothing. No lights go on. The refrigerator, kegerator, water heater, outlets, etc., nothing. EXCEPT that the humongous espresso machine (connected DIRECTLY to the breaker box, not an outlet) will switch on. Most of the outlets are GFCI, but none are tripped. I tried flipping off the circuit breakers for a while then switching back on. Nothing.

I. Don't. Get. It. And we can't even get a health inspection if we can't get the equipment running.... I had a theory that maybe the 30 Amp adapter cord was not enough? Maybe I need a 50 amp? I just don't know what to try.

HELP!!!!!!!!!

[jeff_1981]

2oldman wrote:

jeff_1981 wrote:
For the part going to the generator, I had to use a 30 Amp Generator 4 Prong to RV30 Amp Adapter cord I got from Home Depot.

I'm perplexed here.

According to the pic of the generator, there's a 120/240 socket. Is that not a 50a 4-prong connector that your plug should fit into directly?

All I know is the end of the cord I have has three prongs (two diagonal flat and one circle), and the only way I could connect it to the four prong locking female connector on the generator was to use this: https://www.homedepot.com/p/30-Amp-Generator-4-Prong-to-RV30-Amp-Adapter-cord-G30M4RV30F/202510179

Any chance I just need a new cord or adapter?

[2oldman]

jeff_1981 wrote:
For the part going to the generator, I had to use a 30 Amp Generator 4 Prong to RV30 Amp Adapter cord I got from Home Depot.

I'm perplexed here.

According to the pic of the generator, there's a 120/240 socket. Is that not a 50a 4-prong connector that your plug should fit into directly?

[time2roll]

The main breakers in the RV panel should have 240v between them.
Each breaker should measure 120v to the neutral bus.

Post the results

[jeff_1981]

I do! Where should I check and what reading should I be getting?

[Dutch_12078]

Do you have a meter that you can use to check the voltages at the generator and other junctions along the way?