I can't seem to reconcile T 310.15(B)(6) with 110.14(C)(1)(b)(1). What do you think?
This is a residential single phase overhead service drop, going to a GE meter center with feed thru lugs. The 200A main will protect the feeder to a 200A subpanel inside. Local jurisdiction using 2005 NEC.
Does 2005 NEC T310.15(B)(6) allow 4/0 Al for service and feeder, or is that trumped by the manufacturer’s label [Use 60/75C conductors], which would require 250 kcmil?
Two different things. 310.15(B)(6) gives you a break on the ampacity because they know there is a lot of diversity in the total load of a dwelling. You are not using 310.16 at all.
Does 2005 NEC T310.15(B)(6) allow 4/0 Al for service and feeder, or is that trumped by the manufacturer’s label [Use 60/75C conductors], which would require 250 kcmil?
The safe bet is always to ask your AHJ as theirs is the only opinion that matters, but I concur with Greg, 310.15(B)(6) requires 4/0, and specifically states you don't have to go larger. 310.16 does not apply to this cable.
