Re: How Long before i go to a bigger wire?
Actually, it could be close to being acceptable. I can?t be sure without more information.
First of all, the size of the service is not relevant. I would need to know how much load the equipment draws. Next, I would need to know whether the equipment is fed at 120 volts or 240 volts. Finally, being ?over 100 feet? is not enough detail.
Just for an example, if the run is exactly 100 feet, and the equipment is fed at 240 volts, and if the load is 45 amps, then a #8 gives you a reasonable voltage drop of 3%.