#6 AWG, with a 100 Amp Service Disconnect (Breaker)?

[Mike Lima]

Scenario:

1). Load Calculation for small dwelling unit ungrounded conductors using 220 section III (Standard) = 63 Amp
2). Service Conductors temperature rating = 90 Degree Celsius
3). Service equipment and disconnect (breaker) temperature rating= 75 Degree Celsius
5). Service disconnect (breaker) ampere rating= 100 Amp (minimum size for dwellings according to 230.79 (C))
4). Three Service conductors, 2 ungrounded and 1 grounded (120/240 Volt 3 wire), in underground conduit.

Question:

Do the NEC code, 230.31 and 110.14 (1) (a) (3), allows me to use a #6 AWG service in this Scenario?

 

[Dennis Alwon]

IMO, the minimum size allowed would be a #4 copper based on 310.15(B)(6) in the 2011. IMO, if the power company supplies the lateral they can do what they want but the NEC, I believe will require it to be #4 Look at 230.90

 

[Mike Lima]

IMO, the minimum size allowed would be a #4 copper based on 310.15(B)(6) in the 2011. IMO, if the power company supplies the lateral they can do what they want but the NEC, I believe will require it to be #4 Look at 230.90

Ohhh.. Ok. Thank You.