cdAtlanta
Member
- Location
- United States
I am working on a bid for a multifamily project, 208/120 V where each apartment is served by an SER cable (4-story wood construction bldg).
Plans call for the following SER sizes (ignoring voltage drop, using AL wiring): 110 Amps 2/0 cable, 125 Amps 3/0 cable and 150 Amps 4/0 cable.
Since the code eliminated the insulation requirement from article 338 for this size of service cable and since 310.15(B)(7) now allows the factor of 83% to be used for 208/120 I am thinking that this could be done using 2/0 for 150Amps, 1/0 for 125Amps and #1 for 110 Amps.
What am I missing? Thanks in advance
Plans call for the following SER sizes (ignoring voltage drop, using AL wiring): 110 Amps 2/0 cable, 125 Amps 3/0 cable and 150 Amps 4/0 cable.
Since the code eliminated the insulation requirement from article 338 for this size of service cable and since 310.15(B)(7) now allows the factor of 83% to be used for 208/120 I am thinking that this could be done using 2/0 for 150Amps, 1/0 for 125Amps and #1 for 110 Amps.
What am I missing? Thanks in advance