The North American electrical code states that a conductor for a motor must be rated at 125% of the motor's full load amperage. 125% x 50 = 63 amps.
A #6 copper conductor with an insulation factor of 75 or 90 degrees C is rated at 65 amps respectively.
The amp size of a wire is determined by its gauge, not the number of wires. An 8-gauge wire is typically rated for around 40-60 amps, depending on the type and insulation of the wire.
For a 225 amp 208 volt 3 phase circuit, you would typically need to use a 3/0 AWG copper wire or a 250 kcmil aluminum wire. Be sure to consult with local electrical codes and regulations to ensure compliance with specific requirements for your installation.
If you have a 2-wire 30 amp compressor and you want to connect it to a 3-wire 30 amp dryer plug, you may need to install a new 3-wire power cord on the compressor that matches the dryer plug configuration. Make sure to follow the manufacturer's instructions and all safety guidelines when making any electrical connections.
For a 20 amp circuit, a 12-gauge copper ground wire is typically recommended. This wire size can safely handle the current and provide proper grounding for the circuit.
Up to about 100 ft the size of the wire is determined by the max current and not the distance. A 90 amp supply needs #6 wire. <<>> A #2 copper conductor will limit the voltage drop to 3 percent or less when supplying 90 amps for 75 feet on a three phase 480 volt system.
If you have to ask here, you shouldn't be trying to wire in a 20A compressor. You will require a special circuit for the voltage and current with an independent breaker. Check your local code for the wire size or talk to a qualified electrician.
2 copper
6
Assuming your power supply is 230 volts, single phase: Full load amp draw = 21, circuit breaker = 50, minimum wire size = 10.
The recommended wire size for a 20 amp breaker is typically 12-gauge wire.
The recommended wire size for a 30 amp circuit is typically 10 gauge wire.
The recommended wire size for a 60 amp circuit is typically 6-gauge wire.
The appropriate wire size for a 20 amp circuit is typically 12-gauge wire.
The appropriate wire size for a 25 amp breaker is typically 10 gauge wire.
For a 25 amp circuit, the appropriate wire size is typically 10 gauge wire.
The appropriate wire size for a 30 amp breaker is typically 10 gauge wire.
The appropriate wire size for a 30 amp circuit is typically 10 gauge wire.