Easy electrician question, hopefully

[.45Cole]

I have an old Dayton air compressor that has a 230V (only) 15A motor. I can't plug the plug into any 220V outlets as it has the classic two bladed ground plug. I figured I'd make an extension/converter to plug into a 6-30 NEMA welder outlet and then hook a NEMA 6-20 outlet to it. The old 5-15 NEMA connectors are hot netural and ground (and so perhaps my old plug) but the NEMA 6-20 is hot hot ground.
Will this bother the induction motor?

[MaryB]

220 is never wired with a 5-15 nema so... I would recheck specs...

[bangerjim]

Whatever the pin-out on your outlet & plug, you need 220 across your motor. Use your DVM and figure out which two you need for 220. You will have 2 hots and a neutral. That is what I would do.

banger

[.45Cole]

I figured it was a 230/115V as it had a 5-15 nema plug. Trying to plug it into a 115V outlet tripped the (what I assume was a thermocouple). Read the label and it's 230V only, So for 220V (and my 230V) they can't be harmed much if I have hot hot ground wired? Is all 220V that way?

The ground isn't a problem, just the hot hot rather than hot neutral.

[.45Cole]

https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcTv2tm-ADFStBCsxI48CKEvM-fnD1sOak8hFaCw6Q3YGfnVKxMQSA
Got it. All 220V is hot hot.

[rush1886]

Problem is, the welder outlet is probably supplied by a 2 pole, 30 amp breaker. Your compressor motor is only rated at 15 amps. Should anything be amiss with the motor, or your homemade conversion cord, a fire could start, prior to the 30 amp breaker doing it's job.

[GREENCOUNTYPETE]

make sure to measure each of your legs to ground and make sure they are 120 to ground

had an issue with deep fryers and wild leg 220 service

the relays run on 120 and did not like 208 to ground

this is found in 3 phase wiring but it can cause issues if you happen to have it and you pulled 2 phases for your 240 and the relay is powered on the leg that is 208 to ground

[.45Cole]

I thought about doing an inline fuse or breaker, but I'd be spending way too much.

[popper]

Yes, the 'hot/high' leg will get you in trouble. Oddball pin is always neutral. 15A is stall current rating. If residential wiring shouldn't be a problem but you should check the associated breakers for rating.

[Plate plinker]

POST #5 now you are catching on.

It works because the two hots will be on opposite phase of each other.

basically they oscillate 60 times a second from positive to negative while the other hot is doing the same but in the opposite side of the sine wave.

[.45Cole]

Plate Plinker- I started to think that, that they were essentially two phase, 180* off and 120V to ground each.

[Riverpigusmc]

220 volt will not have a neutral . Hot-hot-ground