three phase power issues.

sluttygearhere · 11th June 2008, 04:43 PM

Hey guys. I am looking at building a distro box. but I still struggle with the advanced three phase power issues and looking for a little help with it.

If I run 100 amps into a box three phase. What would my output capacity be? I am thinking 300 amps? 100 amps per leg of the three phase input? is this right? If someone could verify or explain what that numbers would be that would be awesome

Thanks for any help.

-- Ben

dkatz42 · 11th June 2008, 07:08 PM

I'm pretty sure it's 100A per leg, but if you don't know you probably ought not to be doing this without a real electrician. (Even if you *do* know you probably ought not to be doing this without a real electrician.) Waaaay too easy to kill someone.

tINY · 11th June 2008, 10:38 PM

If you have a 3-phase, 110v Wye connection, then you have three 100a legs that are fairly well isolated from each other.

You'll have 3 hot lines, one neutral line (I think that has to be rated for 2x the 100a, but make sure), and a safety ground. There should be about 208v between any 2 legs.

-tINY

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11th June 2008, 04:43 PM	#1
sluttygearhere Gear maniac Join Date: Jul 2007 Location: Memphis TN Posts: 203	three phase power issues. Hey guys. I am looking at building a distro box. but I still struggle with the advanced three phase power issues and looking for a little help with it. If I run 100 amps into a box three phase. What would my output capacity be? I am thinking 300 amps? 100 amps per leg of the three phase input? is this right? If someone could verify or explain what that numbers would be that would be awesome Thanks for any help. -- Ben __________________ "quit talking about it and just record the damn thing, we can hate it later" _Tom Dowd --------------------------------------- Ben Shockley Firestorm Productions 901-833-9852 ben@firestormweb.com http://www.firestormweb.com I build custom computers, Give me a call or shoot me an email for a quote.

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11th June 2008, 07:08 PM	#2
dkatz42 Lives for gear Join Date: Aug 2004 Location: Santa Fe, NM Posts: 898	I'm pretty sure it's 100A per leg, but if you don't know you probably ought not to be doing this without a real electrician. (Even if you do know you probably ought not to be doing this without a real electrician.) Waaaay too easy to kill someone.

11th June 2008, 10:38 PM	#3
tINY Lives for gear Join Date: Jul 2004 Location: Orygun Posts: 5,823	If you have a 3-phase, 110v Wye connection, then you have three 100a legs that are fairly well isolated from each other. You'll have 3 hot lines, one neutral line (I think that has to be rated for 2x the 100a, but make sure), and a safety ground. There should be about 208v between any 2 legs. -tINY