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18 amps.
According to NEC, it's max rating in free air is 18 amps.
You are probably thinking about 1/0 wire (1 ought wire). In copper it is rated at 175 amps and in aluminum 125 amps.
70 amps.
30 amps
The amps that a four gauge wire will handle will depend with the thickness of the wire. If the wire is thin, the four gauge will handle 95 amps.
18 amps.
According to NEC, it's max rating in free air is 18 amps.
You are probably thinking about 1/0 wire (1 ought wire). In copper it is rated at 175 amps and in aluminum 125 amps.
140 AMPS
70 amps.
30 amps
A #8 copper wire with an insulation rated at 75 or 90 degrees C is rated at 45 amps.
A #8 copper wire with an insulation rating of 90 degrees C is rated at 45 amps.
30 amps is how much a 10-2 wire will carry at 110 feet. 10 gauge wire is only good for thirty amps per the national electrical code. Using 80% of the breakers usage you will actually be getting only 24 amps.
A #8 copper wire with an insulation factor of 75 or 90 degrees C is rated at 45 amps.
Generally 40 amps continuous or 50 amps surge is safe.