I have 150 amp main service and want to know how many amps would be enough to run to the sub
2007-12-20 07:07:10 · 6 answers · asked by Matthias C 1 in Home & Garden ➔ Do It Yourself (DIY)
Panels don't come with odd numbers of circuits
so figure you'll be adding 8 poles.
Thats 4 poles per phase.
Unless there's something heavy, like power tools
or a heater, electric dryer etc. you should be just
about right. Why not play it safe?
If you're going to the trouble, it's not that much more
cost or effort to install a 100A. sub panel, feeder and breaker.
Then you'll be sure it's not undersized and have
some 'wiggle room` for voltage drop and anyhting
you wish to add in the future.
2007-12-20 11:48:29 · answer #1 · answered by Irv S 7 · 0⤊ 0⤋
Are you going to be running anything with 220 voltage, like a dryer, Heavy duty Freezer, or electric stove? if the answer is YES to any of that I'd go at least 75 if not just bumping up to 100. Best bet is to figure what you're expected load will be. 6 circuts at 15 amps, means you could be running as much as 90 amps on that alone. Keep in mind that a 15 amp circut is not going to blow at 16 amps. Most will run up to about 20 before they blow. If you expect to be anywhere close to load on a few of the circuts, like a home theater, and a laundry room, and maybe a pantry with a big freezer and fridge, then I'd definitely consider going up to 100 amp panel, as far as price goes, it's not going to cost you all that much more, and this way you're not going to limit yourself.
2007-12-20 07:32:05 · answer #2 · answered by xsailor367 3 · 1⤊ 2⤋
we use main feed at 100 amp breaker then to apartment with 50 amp run normal things like lights TV electric stove and electric heater never have problem--still never hurts to ask local electric supply company
2007-12-20 07:19:56 · answer #3 · answered by southarkansas 6 · 0⤊ 0⤋
Really hard to answer with what you've given. It depends on what you plan on running down there. You will have to look into the fixtures that will be plugged in down there. Then look at there wattage and amperage ratings to calculate how much load you will be drawing.
2007-12-20 07:21:05 · answer #4 · answered by Anonymous · 0⤊ 0⤋
That would depend on the expected load on the sub panel. The electrician who will be installing it will help you out sizing the feeder.
2007-12-21 04:40:44 · answer #5 · answered by John himself 6 · 0⤊ 0⤋
Calculate the load.
2007-12-20 07:13:47 · answer #6 · answered by Johneye 4 · 2⤊ 0⤋