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I am running service entrance wire from a 400amp single meter main with 2 200amp disconnects (breakers) to the 2 200amp se. 200 amp, 40 circuit panel 400 amp meter base 2x 4 back supports or 5/16 molly screws.
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Using 600al on a service with single main 400 amp ocpd is noncompliant even using the round up rule as 350 amp ocpd's are available.
400 amp parallel service wire size. A person needs to select a conductor size with an ampacity past 350 amps to be able to select the next size up 400 amp ocpd assuming the calculated load is less than the conductor ampacity. The size of wire for service entrance conductors for a 400 amp 3 phase service could be 500 mcm copper. Depending on the situation, sometimes two sets of 3/0 in parallel will be used, since 500mcm is so thick and hard to work with.
Table 310.16 lists the ampacity of 3/0 copper as 200a (75c). 1) 400 kcm copper or 600 kcm. Table 310.16 lists the ampacity of 3/0 copper as 200a (75c).
At se cable & wire size tables vs amps. What size aluminum service entry cable do i need for a 200a panel on a 400 foot length? Did you mean that the inspector is requiring 600 kcm copper to feed a 400a service?.or 400 kcm copper?.
The local cost for 600 kcmil is about $9.50 / ft. I have decide to parallel conductors instead and the camden, nj plan reviewer wants new drawings to reflect the new installation. Be sure to brace, guy, or concrete service pole 8’ ground rod with approved ground rod clamp switch box conduit hot wire neutral lightning size size size size ground 400 amp 3” or 2 ½” 2 # 500mcm 1 # 250mcm 1#1/0 only copper wire (type thhn or thwn) allowed 16’ min.
This is very large size wire and difficult to bend and shape, to connect to terminals in the. 600al is 340 amp conductor. Be sure to brace, guy, or concrete service pole 8’ ground rod with approved ground rod clamp switch box conduit hot wire neutral lightning size size size size ground 400 amp 3” or 2 ½” 2 # 500mcm 1 # 250mcm 1#1/0 only copper wire (type thhn or thwn) allowed 16’ min.
This puts us down at 328a for the parallel combination, just short of the 332a required by the 83% rule for a 400a nominal service entrance. 400 amp parallel service wire size. Table 310.15(b)(6) lists the conductor size for a 400a dwelling service and feeders as 400 kcm copper or 600 kcm aluminum.
400 amp parallel service wire size. 1) 400 kcm copper or 600 kcm. 400 amp parallel service wire size.
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