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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.

  • This application considers both ends of the issue at hand. Ultimately, the circuit breaker is intended to protect the house wiring, FIRST and foremost. If the device needed it's own in-line fuse or protection, step-down could be integrated. Here, the appliance would draw less than the breaker's maximum current. All will be cool, no pun intended. – Dad Bear Oct 17 '17 at 14:57
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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.

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    ...and you'd have a 30A breaker on a 20A device... – Ecnerwal Feb 28 '15 at 22:40
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    @Ecnerwal -- the ampacity is not the problem. A 6-20R to 14-30P adapter is legal; the equivalent with a 10-30P isn't because of the missing equipment grounding conductor. Besides -- how is a 20A heater on a circuit protected by a 30A breaker any different from a 1A clock radio on a circuit protected by a 15A breaker, or a 10A fridge with a 5-15P plugged into a 5-20T receptacle? – ThreePhaseEel Mar 1 '15 at 1:10
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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! :)

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    These adapters cannot be legally used anywhere UL-listed wiring devices are required, as they cannot have a legit listing due to them abusing neutral as a ground, or leaving ground floating. – ThreePhaseEel Feb 2 '18 at 4:15

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