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Old 2021-10-19, 8:29am
rcktscientist rcktscientist is offline
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Join Date: Jun 19, 2021
Location: los angeles
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Electricians often use an 80% limit rule of thumb.
A 20A circuit operating at 80% would provide 16A safely.
Using your 14A kiln, that would give you a nice little 2A margin, which at 120V is about 240W to be used at any other outlet on that circuit.

The 15A circuit would already be operating at around 93% capacity and that is generally frowned upon from an electrical safety standpoint. Plus no real margin so any additional draw would likely pop that breaker. That means with a kiln on the circuit, all other outlets on that circuit would be effectively useless.

Best of luck!
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