Dave H M wrote:
1971duster340 wrote:
smkettner wrote:
Yes 30 amp 240v breakers are in virtually every home..
But it's a 2 pole gang operated breaker (120v+120v = 240v), not single pole 240V breaker. Only other countries have 240v on one breaker.
But, do I understand...both the neu. (or gnd.) and hot legs were energized at the pedestal plug...he tied 2 hot phases into the power chord connection lugs instead of the hot and neu.? We're talking 30a or 50a RV service?
You said a mouthful there. :h It is totally over my head how an "electrician" could hook up two hot legs to a 110 outlet. So did he piggy back the two hots onto the one hot on the 30amp 110 circuit breaker?
One hot leg incorrectly goes to what should be hot. The other hot leg incorrectly goes to what should be neutral. Neutral incorrectly goes to what should be ground. There's no separate safety ground.
The basic problem, as others have mentioned, is that the TT30 and the common 3-wire 240V dryer outlet look superficially similar but are wired quite differently. While new construction uses the four-wire dryer outlets (with a separate safety ground), many many existing houses have only the three-wire variant, and maintenance activities like replacing a worn socket require working with them and often don't legally require upgrading to a four-wire circuit (and the associated running of a new wire).
The 50A RV outlet is identical to a 50A range outlet. You could haul an electric range to a campground and plug it in without problems, if you wee so inclined. You could also run the 50A RV cord in through a kitchen window and unplug the stove and plug in the RV if you wanted. Neither would be particularly convenient, of course; but it does mean that electricians are much more familiar with wiring up these outlets and hence tend to make fewer mistakes.
