depends on its use. If its for residential service its good for 125 amps
In commercial and industrial installations it's a bit more complicated but you end up at the same 125 amps.
140 AMPS
3/0 gauge
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.
Typically 30 amps.
#6 wire is good for 65 Amps as long as it is type THHN.
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.
140 AMPS
Generally 40 amps continuous or 50 amps surge is safe.
5000 watts
70 amps.
101 amps for chassis wiring and 37 amps for power transmission. This is for short lengths of wire.
Yes, 12 AWG is good for 25 Amps if copper wire.If aluminum wire, then good for 20 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.
18 amps.
10 gauge wire will only run up to 30 amps
The normal current capacity of 12 AWG copper wire is 20 amps.
You should never try to use more than 15 amps through a 14 gauge wire.