Electrical Wire Gauge Calculator
Electrical wire gauge calculator
How do you determine cable wire size? Divide the voltage running through the cable by your target current. If, for instance, 120 volts will act on the cable, and you want 30 amps to run through it: 120 / 30 = 4.
How do I calculate which wire to use?
Wire Sizing Chart and Formula
- Calculate the Voltage Drop Index (VDI) using the following formula:
- VDI = AMPS x FEET ÷ (% VOLT DROP x VOLTAGE)
- Determine the appropriate wire size from the chart below.
How far can you run 10 gauge wire on a 20 amp circuit?
How Far Can You Run 10 Gauge Wire? You can run a 10 gauge wire up to 85 feet on a 20 amp circuit. If you opt to use this type of wire on a 15 amp circuit, it can run up to 115 feet. After these distances, the circuit will go over the recommended 3% voltage drop.
What size wire do I need for 20 amp?
The perfect wire gauge of a 20 amp breaker is the #12 AWG wire.
Will 8 gauge wire carry 50 amps?
8 AWG may carry a maximum of 70 Amps in free air, or 50 Amps as part of a 3 conductor cable.
How Far Will 6 gauge wire carry 50 amps?
Your standard wire size chart will tell you that 6 AWG wire, which is rated for 55 amps, should be the wire size for 50 amp circuits. At 50 feet, that should be fine. You can consider that as the maximum limit for how far will 6 gauge wire carry 50 amps safely.
What wire thickness should I use?
Choosing Electrical Wire Size 18-gauge are used for low-voltage lighting and lamp cords in 10 amps. 16-gauge are used for light-duty extension cords supporting 13 amps. 14-gauge are usedfor light fixtures, lamps, lighting circuits with 15 amps.
Does length of wire affect amperage?
Relationship between the length of a wire and it's AWG/amperage rating: none. Relationship between AWG and amperage rating: basically, AWG is linked to wire diameter/cross-area. The higher is the cross-area, the higher is the ampering rating.
How far can you run 14 gauge wire on a 15 amp circuit?
For a 120-volt circuit, you can run up to 50 feet of #14 AWG cable without exceeding 3% Voltage Drop on a 15 amp circuit.
How Far Will #10 wire carry 30 amps?
Ten-gauge wire can run for up to 128 feet under 30 amps. For typical household applications, a wire of this size can handle up to 30 amps, but it's best to keep this figure in mind before you start your wiring project.
Can I put a 20 amp outlet in a 15 amp circuit?
If your question is “can I connect a receptacle rated for 20 amps to a circuit designed for 15 amps?”, the answer is yes, because the receptacle can handle more current than the circuit is rated for. If you exceed 15 amps, the breaker will blow, and protect the receptacle.
Is it OK to use 10-gauge wire for outlets?
You can use 10-gauge copper wire for single-phase electrical power outlets rated for 20 amps at 120-volts 60 Hz.
Can you put 14 gauge wire on a 20 amp breaker?
You cannot use any 14 gauge wire on a 20 amp circuit. This is true, even running to a light fixture that has smaller wires built in. The wires built into the fixture are allowed as part of a manufactured assembly. However, any added wire must be appropriate to the circuit breaker protecting the wire.
Can I mix 12 and 14 gauge wire on a 20 amp circuit?
You can, but it is not a good idea. Highly discouraged. An electrical inspector may have a bird and not want to pass your installation, You will confuse anyone working on the circuit in the future as to if it is a 15 or 20 ampere circuit.
Will number 12 wire carry 20 amps?
How many amps can a 12 AWG wire handle? This is usually one of the most important specifications for any wire. 12 gauge wire can carry: 20 amps at 60°C (20A ampacity or amperage).
What size wire do I need for 50 amps at 100 feet?
In most cases, 6 AWG is an almost perfectly-sized wire for a 50 amp breaker. In limited cases, you will probably have to use a larger 4 AWG wire. That's when you have a long circuit and are sending electrical current at some distance (100 feet or more).
How far can you run 8 gauge wire for 40 amps?
The rule of thumb is to go up one size larger if you plan on running the recommended wire size over 100 feet. This means that if you are planning on running 8-gauage wire for a 40 amp breaker over 100 feet, you should go to 6-gauge wire.
How many amps is #8 wire good for?
8 Gauge Wire Amp Rating #8 Gauge THHN Copper Stranded Wire is the most popular single conductor copper wire we carry and is RATED FOR 55 AMPS @ 90°C.
What size wire do I need to run 50 amps 150 feet?
To run 50 amps at 150 feet, you can use No. 4 AWG. The larger the wire diameter is defined by the smaller numbers on a wire.
What size wire do I need for 240 volts 50 amps?
For a maximum of 50 amps, you'll need a wire gauge of 6. Fifty amp breakers are most often used to power many different appliances.
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