30 amp is really 20amp

j-d wrote:
The way the park maintenance man described it to me, the "loop" of 10 sites was served by one loop of cable, wired to 30A pedestal outlets, and served by one 100-amp fuse. I asked, Fuse, not Breaker? Yep, Fuse. The kind that looks like a big firecracker with a thick copper blade sticking out of each end? Yep. Park was probably built by the CCC in the 1930's. Doubt it had electricity at all at first, but sounded like the power could have been 1960's vintage...

Yes, probably really old wiring with worn and loose connections, those are the kind of things that cause a lot of voltage drop, and my guess is the service at the main isn't the best of the best. However, unless that 100 amp fuse is blowing all the time, or has been replaced by a copper penny (like we did in the good ole days), the circuit isn't being overloaded with those ten 30 amp connections. If it was the main would trip, or in this case, the main fuse would blow.