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The three main fuses are 600 volt, 150 amp. Fuses are and were during both episodes dual element, time delay. I'm guessing that breakers are simply not tripping. Can't think of anything else it...

Here's a weird one. I have a tenant with a 150A, 3-Phase, 480V service. The main switchboard is in the basement and the breaker panel is located in the tennant's space 50 feet away. There is also a...

Here's a weird one. I have a tenant with a 150A, 3-Phase, 480V service. The main switchboard is in the basement and the breaker panel is located in the tennant's space 50 feet away. There is also a...

Does your landscape lighting plug in outdoors? If so, install 3 separate GFI's. One at the laundry, porch and outdoors for your landscape lighting. Wire the recepts to "line" only so that they will...

I'm curious how to size a service using parallel feeders. If I had a 600 amp, 3-ph service would I simply add together the ampacity ratings of a selected copper wire size or do I need to derate the...

Thanks for the great communication!

The tenant just wants an 800 amp 208v hand off to his space. His actual load will be in the 600 range. So, it sounds as though I can squeeze this out of the 400a, 480v existing service via a 300 KVA...

So hypothetically instead of 600amps...

If I had a 3PH 480v, 400a service or 332 kva, could I convert that into 3PH,800a at 208 with a 300 kva step-down transformer? Would this satisfy the NEC?...

Can you show me the formula that you used realitive to the voltages in converitng the KVA to amps?

The area of concern has a 3-phase, 480v, 600a unused switch from the main service. The customer wants 120/208v 3-phase power to his suite but needs 800 amps. Sounds like 600a max is what he's going...

These outdoor flood lights blink, flash on/off or go out entirely when they are defective. Sometimes it appears to be a defective lamp, while other times the ballast will need replacement. These new...

If I have a 600A 480v service and I step in down to 120/208, will I have an increase of available amperes at the lower voltage? Or will the amperage remain the same no matter how I change the...