Re: Wiring 220V Compressor

[jeff-register]

Adam,
I go by the national electric code. If an inspector disagrees he or she MUST prove you wrong in the NEC book. Your 5hp compressor you forgot to tell me what voltage you are running at so no calcs can be made. Let’s assume 120vac. At 120 volts your compressor draws 27.25 amperes@125% Now you have a 30 ampere service & by code should use no more than 80% which is 24 amperes. You are overloaded by 3.25 amperes. Do you have a clip on ampmeter to check actual current draw? I have two to check one against the other. A guy can never tell when a tool goes south so a second meter is good to have away from the shop. Now if you are running 240 volts calculate it again please. Have you ever worked with a delta wye config? It has a delta config but two wires are 120 to ground, The third wire is 240 to ground. That form of three phase was used here in Arizona to get hermetic type compressors started easier. I have repaired air conditioning by using a bag of ice. The compressors have a thermo switch on the tops of the compressors. I cooled off the compressor with a bag of ice till the thermo switch closed again & we had air conditioning again. It was a very hot 118 degree day that summer. A few summers back the airport stopped flights. THe density of the air went off the charts & the controllers could not calculate the lift of the wings to get them to fly out & drop like a rock coming in. WE pay very close to the temps here in Phoenix.
I have gone too far not talking about marine stuff so lets go to e mail.
Jeff