# What Gauge Electrical Wire For 20 Amp Circuit

What Gauge Electrical Wire For 20 Amp Circuit. Can 14 gauge be used as a ground wire in a 20 amp circuit. The 12 gauge wire is the old (existing) wire in the basement that will be replaced by the electrician when he connects to new 15 amp circuits.

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Lets say you have a few outlets on a 20a breaker and all are wired with 12 gauge wire. You wont be using a neutral wire. so the cable should have only two hot wires. which are red and black. and a bare ground wire. A 10awg should fit in most 20amp breakers.

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For 140. youll need #6 copper or #4 aluminum. To be safe i would probably go up one wire gauge.

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For motors. it is recommended to multiply the nameplate fla by 1.25 for wire sizing. So from that calculator i get 12awg for 20amps and copper.

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So from that calculator i get 12awg for 20amps and copper. However. there are certain essential assumptions that that rule of thumb.

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I am running the wire through emt.green i ran out of green 12 gauge. but have plenty of green 14 gauge. can i use the 14 as a ground with the 12 hot and nuteral? It supplies several outlets and lighting fixtures.

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To be safe i would probably go up one wire gauge. 3 phase requires a 50 amp breaker based on voltage.

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So from that calculator i get 12awg for 20amps and copper. Suppose that somewhere along the circuit. 14 gauge wire is paralleled off the 12 gauge wire to supply a single 60 watt light bulb.

#### You Wont Be Using A Neutral Wire. So The Cable Should Have Only Two Hot Wires. Which Are Red And Black. And A Bare Ground Wire.

The best wire to use for 20 amp is the no. Yep. 20a breaker needs 12 gauge wire as per code. This wire will safely carry 20 amps up to 100 feet.

#### Suppose That Somewhere Along The Circuit. 14 Gauge Wire Is Paralleled Off The 12 Gauge Wire To Supply A Single 60 Watt Light Bulb.

If you plan on going over 100 feet. or if you want to run the wire in conduit. you should upgrade to 10 gauge copper wire. For 140. youll need #6 copper or #4 aluminum. However. there are certain essential assumptions that that rule of thumb.

#### For Motors. It Is Recommended To Multiply The Nameplate Fla By 1.25 For Wire Sizing.

31 rows electrical current is measured in amps. This is shown in this chart above. however different building codes use different awg (american wire gauge) standards so these wires are not all the same. I am running the wire through emt.green i ran out of green 12 gauge. but have plenty of green 14 gauge. can i use the 14 as a ground with the 12 hot and nuteral?

#### Assume You Want To Add A Doorbell. And You Tap Power Off Of The Last Outlet In That 20A Circuit.

3 phase requires a 50 amp breaker based on voltage. But here is a theoretical question that makes sense in my mind. The 12 gauge wire is the old (existing) wire in the basement that will be replaced by the electrician when he connects to new 15 amp circuits.

#### The Potential For Danger Is Most Pronounced With The Use Of Light Household Extension Cords.

For 60 amp. the correct wire size is 4. When you set up an electrical system. the ampacity should match the amps of the circuit breaker or fuse. Before wiring an outlet. make sure to check your breaker box to find the amperage of the circuit you are working on.