Originally Posted by jsk
Thanks for the reply. After doing some more reading, I think I will stick to my original plan and run a 30a service with a receptacle that fits my unit. This should eliminate any problems. Until then I will plug in to a 110 while at home.
If you've got a 20 Amp 120v outlet nearby that should
be OK. It depends on how big your roof AC unit is.
I don't normally run my AC at home so I plug into
a garage outlet all the time when we're charging batteries
and/or chilling the refer as we pack to go camping.
IF you're not gonna be running the roof AC just about
any home outlet will probably work -assuming- it
doesn't already have a bunch of load on it.
That welding recptacle might be fine also -you just need
to be SURE the output is correct using a 50 to 30 adapter.
The following is just for "conversation" only and not
intended to instruct anyone how to make the connections---
A typical home 220v supply usually has 2 110v "hot" wires
and a neutral and a ground. Older homes will have
3 wire range/dryer outlets that do not have a ground.
If you take a meter and read voltage from one of the hot
wires to neutral you should read 110v.
If you take a meter and read from one hot wire to the
other hot wire you should read 220v. This is how
a home electric dryer or home cooking range get
the necessary 220v.
A typical RV post with 50 amp plug has 4 prongs.
It has 2 hot
one neutral and
If you want to run a typical 30 amp 110v RV
off of a 50 amp RV post you can
connect one hot and the neutral and the ground
via an "adapter" available from WalMart
or just about any RV parts store.
I just can't give you a concrete answer about your welding
recpt because I don't know if a typical RV 50 to 30
adapter will even fit the holes AND I don't know if the
voltages and neutral and ground would be on the correct
pins. I don't even know if your welding receptacle
even has the necessary neutral AND ground wires.
(Is it 3 or 4 pins?)
A knowledgeable electrician who knows the necessary
pin outs for these RV adapters can answer that.
You might not need anything else but the correct
Be careful and