enter image description hereThe unit says 230/208v model. It has a 20amp plug on it. 1st question My garage panel was put in 30+ years ago. It is fed from house panel with 12 gauge wire with 2 hots. Is that too weak to add a 240v, 20 amp receptacle?

2nd question: I had a 120v receptacle, for a kiln I no longer have. Can I use this 12 gauge wire and switch receptacle to accommodate the heater plug? I would change breaker to a double 20A.

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    Can you post photos of the inside of the panel please? – ThreePhaseEel Jul 20 '20 at 23:12
  • Can you post a clear photo of the cables just below the bottom of the box, and also of where the cable with the cloth-wrapped wires enters the box? – ThreePhaseEel Jul 22 '20 at 0:10
  • would have to tear down wall to get pic of anything under or behind box. – storm Jul 24 '20 at 1:09
  • Are you saying the box is flush-mounted then? Because it looks to me to be surface-mounted to a plywood backer from what little I can see in your photo of it – ThreePhaseEel Jul 24 '20 at 1:27
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    yes flush on plywood wall – storm Jul 28 '20 at 21:20

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