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You are watching: Wire size for 400 amp 3 phase service


I am structure a 400 amp (class 320) service. Is it permissible to use 500 MCM XHHW aluminum (350 amps rated) because the load is not consistent on a service?
I am structure a 400 amp (class 320) service. Is the permissible to use 500 MCM XHHW aluminum (350 amps rated) because the pack is not continuous on a service?
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I am structure a 400 amp (class 320) service. Is that permissible to usage 500 MCM XHHW aluminum (350 amps rated) since the load is not constant on a service?
"If the doors that perception to be cleansed everything would appear to man as it is, Infinite. William Blake
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I am structure a 400 amp (class 320) service. Is the permissible to usage 500 MCM XHHW aluminum (350 amps rated) since the pack is not constant on a service?
"If the doors the perception to be cleansed whatever would appear to man as the is, Infinite. Wilhelm Blake
I am structure a 400 amp (class 320) service. Is it permissible to usage 500 MCM XHHW aluminum (350 amps rated) due to the fact that the load is not constant on a service?
You don"t get to usage the 90 level value of 350 Amps... Therefore the rating is 310 Amps.My Poco dictates wire sizes because that Services. Down stream feeders space sized to the NEC.
Reactions:glen1971, five.five-six, tmessner and 1 various other person
Reactions:Southeast Power
That is my plan, however this POCO makes us pull service to the pole and dont want paralleled conductors
That is mine plan, but this POCO renders us pull business to the pole and dont desire paralleled conductors
Like as in, you can"t do it? Or they just don"t choose it? occasionally they will certainly splice a quick piece of larger copper ~ above to take parallels down to a solitary wire.If it"s a rule that"s actually sort of dumb, since some services you aren"t may be to carry out with a solitary conductor.Sent from my Moto Z (2) utilizing Tapatalk
Over here, I"d use 750AL XHHW and also downsize the neutral to 250AL if there wasn"t lot neutral load.If you have actually multiple organization disconnects, your wire size only has to carry the fill regardless the the dimension of the company disconnects.But, if you only have actually one company disconnect, as is your case, you need to size come the rating that the OCPD or usage the "round increase rule" assuming your calculated pack doesn"t exceed the conductor rating.Which is why I said 750AL, i m sorry is rated 385 amps, if i remember right, and also it is permitted to feed a 400 OCPD assuming the pack is under 385 amps.
Like as in, girlfriend can"t execute it? Or they just don"t favor it? sometimes they will splice a quick piece of bigger copper on to take parallels under to a solitary wire.If it"s a ascendancy that"s actually type of dumb, since some solutions you aren"t able to execute with a single conductor.Sent from mine Moto Z (2) using Tapatalk
Like as in, girlfriend can"t carry out it? Or they simply don"t choose it? sometimes they will certainly splice a short piece of larger copper ~ above to take it parallels under to a single wire.If it"s a dominance that"s actually type of dumb, since some services you aren"t able to execute with a solitary conductor.Sent from mine Moto Z (2) making use of Tapatalk
600AL is 340 amp conductor.Using 600AL on a organization with solitary main 400 amp OCPD is noncompliant also using the "round up" ascendancy as 350 amp OCPD"s are available.A human needs to pick a conductor dimension with an ampacity previous 350 amps to have the ability to select the following size increase 400 amp OCPD assuming the calculated fill is much less than the conductor ampacity.FYI, I"m to express 310.15(B)16, 240.4(B), and 240.6(A).

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600AL is 340 amp conductor.Using 600AL on a company with single main 400 amp OCPD is noncompliant even using the "round up" dominion as 350 amp OCPD"s room available.A person needs to select a conductor size with one ampacity previous 350 amps to have the ability to select the following size increase 400 amp OCPD presume the calculated load is less than the conductor ampacity.FYI, I"m express 310.15(B)16, 240.4(B), and 240.6(A).
I am structure a 400 amp (class 320) service. Is it permissible to use 500 MCM XHHW aluminum (350 amps rated) due to the fact that the load is not continuous on a service?
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