Depending on whether or not your electrician figured a 3 or 4 wire feeder from the meterbase/(disconnect?) this could save you the cost of one wire. You'll derive your neutral from the transformer near your garage panel. How many people does he think will bite when given a quote like that?ĮDIT: I forgot to mention, you'll only need 3 wires between the transformers. 100 amp circuit at 240V can handle up to 24,000W of electricity. Honestly, I'm very surprised your electrician sent you a quote for $30K without giving you some other options. If you are trying to set up a 100 amp conduit circuit, you will need to make sure to choose the right wire size. That's why I calculated at 5% VD rather than the usual 3%. The good news is you can adjust the transformer taps to make up for voltage drop as well. CATALOG DESCRIPTION: DOUBLE POLE, THREE WIRE, PIN AND SLEEVE INLET. Although if they're sized correctly, some of them can last decades. The bad part about transformers is they always draw current while running even with no load on them, plus it's one more potential failure point in your electrical system. The higher you can get the voltage, the smaller the wire you'll need to run.Ĥ80 volt transformers, 5% VD, would get you down to a 2/0 AL I believe.Ħ00 volt transformers, 5% VD, would get you down to a #1 AL or so. Enter the information below to calculate the appropriate ground conductor size. Since they're not as common as 480 volt, the price may reflect it. 480 volt is common, I've never installed a 600 volt, but they are an option. Next up, I'd try transformers at each end like MRB mentioned. I have a hard time believing they'd charge anywhere close to $30000 for that. and seeing what it would cost to have them set some poles.
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