Hard to answer this question with out the load type and amperage. Depending on the type of load some wire feeders have to be increased by 25%. For a correct answer state what the three phase load is and its wattage or amperage.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized
IF YOU ARE NOT REALLY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
A #8 copper conductor with an insulation factor of 90 degree C is rated at 45 amps.
8 gauge wire
10 gauge
6 AWG
The current will remain in a 220 volt circuit as long as the circuit load remains in the circuit and the circuit remains closed.
No !
4 AWG copper or 2 AWG aluminum.
If it's a 220 volt circuit without a neutral bring wire into panel, put ground wire on ground bar, put load wires onto breaker.
# 3 gauge
6 AWG
The current will remain in a 220 volt circuit as long as the circuit load remains in the circuit and the circuit remains closed.
No !
4 AWG copper or 2 AWG aluminum.
If it's a 220 volt circuit without a neutral bring wire into panel, put ground wire on ground bar, put load wires onto breaker.
Yes 220 & 240 are considered the same.
12 AWG in most circumstances.
yes <<>> No, the ground wire is never to be used as a neutral. In this case if you need a 120 volt circuit from the 220 volt circuit a three wire cable (3C #14) must be installed.
Can you supply three 220 -240 volt 16.6 amp infrared heaters with one circuit?
NO - that is dangerous.
Cannot answer this question. Will need to know the voltage and amperage of the circuit. Also need to know the application i.e. is it a lighting circuit or a motor circuit?