What size supply conductors would be required when

feeding a group of four welders with nameplates, as shown in Table 13-2?

This type of welder is considered as transformer arc welders.

Termination temperature found on the equipment is 75 degree C.

 Use 230 volts , 90 A and 100% duty cycle:

What size overcurrent device is required for the

welder indicated in Table 13-2?

This type of welder is considered as transformer arc

welders.

Termination temperature found on the equipment is 75 degree C.

 Use 230 volts , 90 A and 100% duty cycle:

What size branch-circuit conductors are required for

the welder indicated in Table 13-2 in your book? 

 Use 230 volts , 90 A

and 100% duty cycle:

A welder with its own integral disconnecting means (mounted on the welder) also requires a separate disconnecting means (Mounted on the wall) for extra safety.

If, for some reason, the circuit breaker will not allow the motor (squirrel-cage)  to start, your breaker is inverse-time circuit breaker type, and the motor FLA is 378 amps what would be the maximum size of breaker adjustment that you could use.

What is the minimum size of conductor of a 3/4 hp, 208 V single-phase AC motor if the name plate FLA is 12.5 amps. The TTC is 60 degrees C?

Answer AWG

What is the Maximum Overload heater required, using a time-delay fuse to protect a 575 V, three-phase, insulation class B , 120 hp,  S.F. 1.0 squirrel-cage, continuous duty, ventilated AC motor with a nameplate full load current of 110.6 A?