Exploring options for 600A Service conductors

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Gshock

Member
Location
Maryland
augie47 said:
You indicate there is a 600 amp main and a calculated load of 525 or 540.
(2) parallel 350 AL is out as that would only give you a 500 amp capacity, too small for your load and your main..
(3) 4/0 AL would give you your 540 amps (unless you placed them all in 1 conduit).
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Darn it your right at 70C 350s are rated at 250a each :(. So I would have to go with min 400s AL. 4/0 x 3 is starting to look better and better. Well
 
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curt swartz

Electrical Contractor - San Jose, CA
Location
San Jose, CA
Occupation
Electrical Contractor
Gshock, can you post your load calcs? The load figures seem really high for such small units even with electric heat.
 
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Gshock

Member
Location
Maryland
curt swartz said:
Gshock, can you post your load calcs? The load figures seem really high for such small units even with electric heat.
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Hi Curt, sure I will post em as soon as I figure out a easy way to cut/paste or attach my spreadsheet. I agree with you thought the loads where high, I found the heatpumps with the supp heat to be the culprit. Within the last couple years we did a few of these and with regular gas powered furnaces, were able to get away with just 400a main with 100a-150a(max) apt panels.
 
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