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Q: Can you split a 40 amp 240v circuit into 2 20 amp 240v circuit?

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240V is much more effecient, and you can put more heaters on a 20 amp circuit than you can a 120V.

Absoluteyl not.

A 20 amp circuit will handle any loads up to 20 amps. Any loads above 20 amps will trip the circuit protection and open the circuit. A 20 amp circuit requires a #12 copper conductor.

You DON'T! The washer needs to be on a separate dedicated circuit; 120v, 20 amps. The dryer needs to be on a 240 V, 30 amp dedicated circuit. Trying to do otherwise is unsafe.

A dedicated 20 Amp circuit wired with 12/2 wiring an a 20 amp breaker.

Yes, you can, you are only pulling 15 amp max on a 20 amp circuit, so there is no problem there.

A 20 amp circuit be used for any device that takes up to 20 amps to make it operate.

Install not more that 10 on a 15 amp circuit. You can install 12 if you install a 20 amp circuit.

No, the circuit's over current device will trip the circuit off.

Yes, if properly wired a 20 amp circuit is a great circuit for an 18 amp appliance. Properly wired means you've used 12 gauge wire or larger and the circuit is protected by a 20 amp breaker or fuse and all connections are secure.

No. Also it would be a moot point using a 20 amp receptacle because the breaker protecting the circuit will only be a 15 amp. If you use a 20 amp breaker then make sure that the wire size is #12 and that you remove the 15 amp receptacle from the circuit as it will be not rated for the new 20 amp current.

As long as the light circuit isn't over 20 amps.

Any appliance that runs on 120 volts requires a 20 amp circuit. You cannot install a 15 amp circuit for appliances.

No, it shouldn't be. Purchase a 20 amp rated switch.

Yes, a 20 amp circuit requires a number 12 gauge wire.

A 32 amp fixture can not be fed from a 20 amp breaker as the breaker will trip every time.

In the United States, commercial and industrial installations are limited to 13 receptacles on a 20 amp circuit, 10 receptacles on a 15 amp circuit. There is no limit for residential installations.

7 on a 15 amp circuit and 9 on a 20 amp circuit.

Yes : but in a residential case a 15 amp circuit would be better

80% of the rated circuit. 10 amp circuit is 8 amps, 20 amp circuit is 16 amps, etc.

15 amp outlet on a 20 amp circuit.

Just change the breaker on the 30 amp circuit to a 20 amp breaker.

Never upgrade the circuit breaker's amperage unless you have first upgraded the circuit. A 20-amp breaker will pop before a 12-AWG wire will melt. A 25-amp breaker cannot be relied upon to protect that same 12-AWG circuit.

Yes but it will limit your 20 amp circuit to 15 amps. Any amperage over 15 amps on the 20 amps circuit will trip the breaker protecting the sub panel.

Depends on if it is a 15 amp or 20 amp circuit. You can install no more than 12 outlets on a 20 amp circuit or 9 outlets on a 15 amp circuit. You can install no more than 1920 watts on a 20 amp lighting circuit or 1440 watts on a 15 amp lighting circuit. If it is a 20 amp circuit I would not install any more than 8 outlets and 4 lights. If it is a 15 amp circuit I would not install any more than 6 outlets and 3 lights. This only applies to living spaces like bedrooms, living rooms dining rooms, and not to kitchens, baths, utility rooms, garages, etc.