Think about many universities and industrial complexes.
Customer may well own the transformers, often they even own the primary transmission line. The transformers are SDS systems and the transformer conductors fall under 240.21(C).
The biggest change might be the fact that the conductors to the building are now sized by the NEC. the transformer disconnect might well be a pole mounted switch.
(There is a bit of controversy concerning 250.30 Exception 2, with some changes ion the '11 Code but thats another subject)
Customer may well own the transformers, often they even own the primary transmission line. The transformers are SDS systems and the transformer conductors fall under 240.21(C).
The biggest change might be the fact that the conductors to the building are now sized by the NEC. the transformer disconnect might well be a pole mounted switch.
(There is a bit of controversy concerning 250.30 Exception 2, with some changes ion the '11 Code but thats another subject)
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