Is there a way to plug a 6-20p 208/220/250v plug into a 10-30r receptacle? I can't seem to find an adapter for this. I bought a 220v fahrenheat heater and want to be able to plug it into a range or dryer receptacle.
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You will not find a legal or listed "adapter" for this.
A 6-20 is a straight 240V grounding 20A device. A 10-30 is a 120/240V non-grounding 30A device, where the grounding function is provided via the neutral. This is only allowed in older range and dryer circuits, so any adapter would not be legal to use on any other circuit.
Speedy Petey
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NEMA 10-30 is still in use. I just bought a 16A 240V EV charger and had an outlet installed by a licensed electrician. When you try to interchange with a live ground you may or may not get into trouble. If the power is coming from the main panel (not a sub-panel), ground and neutral buses are shorted together. But if someone tried to do this where the power came from a sub-panel, then there would be no path to earth grounding for the 6-20 load. So actually what you want to do is invalid since neutral cannot be grounded; see this page for more details.
Glorfindel
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ralphie boy
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Yes, there are actually adapters available for this. A quick web search for "6-20r to 10-30p adapter" should give you a few good results. Good luck! :)
John R
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