6ga should be used. It might not be against codes where you are,and you might
have a 50amp installed for something that only uses 40amp, but it should be done right,
and 6ga should be used off of a 50amp breaker.
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No, you should not run 8 gauge wire on a 50 amp breaker. The wire size should be compatible with the amperage rating of the breaker to ensure safety and prevent overheating. For a 50 amp breaker, you should use a minimum of 6 gauge wire.
It is not recommended to connect a 14 gauge wire to a 12 gauge wire on a 20 amp breaker, as this can create a safety hazard. It's important to match the wire gauge to the circuit breaker rating to prevent overheating and potential fire hazards. It would be best to run a continuous 12 gauge wire for this circuit.
The size of the main breaker depends on the maximum current rating of the 10 gauge wire and the load it will be powering. Typically, a 10 gauge wire is rated for a maximum current of 30 amps. Therefore, a 30 amp main breaker would be suitable for running 10 gauge wire. However, it is important to consult local electrical codes and consider the specific load requirements before making a final determination.
#10 cable is no good for 120 amps, you need #2 cable, and it can be used at a distance of 250 ft.
No, you should use wire that matches the lowest amp rating of the breakers connected to it. In this case, you should use 15 amp wire since one of the breakers is a 15 amp breaker. Matching the wire gauge to the lowest amp rating ensures the wire is protected from overheating in case of a short circuit.
For a 15 amp 230V woodworking machine, you should use at least 10 AWG wire to handle the current. You can wire it into a 15 amp breaker with a suitable outlet, like a NEMA 6-15. However, if your woodworking machine has start-up surges or is a larger machine, you may want to consider using a 20 amp breaker and wire with 12 AWG to handle the load more comfortably.