Utility Service Sizing
Utility Service Sizing
(OP)
I am curious if anyone has heard of sizing Utility Transformers & Conductors from Service Panel Sizes?
For example, if a 2400V - 120/240V, 1-Phase stepdown utility transformer will service five houses with 200A, 120/240V, 1-Phase, 3-Wire Serive Panels, would it be possible to size the service transformer and conductors with just this information (square footage of houses are not available).
If so, what type of "design" factors would be recommended?
For example, if a 2400V - 120/240V, 1-Phase stepdown utility transformer will service five houses with 200A, 120/240V, 1-Phase, 3-Wire Serive Panels, would it be possible to size the service transformer and conductors with just this information (square footage of houses are not available).
If so, what type of "design" factors would be recommended?






RE: Utility Service Sizing
House with lts, ref, range, dryer wh, 3T A/C will produce
a certain demand. 4 houses produce a certain demand. I believe it is done more with the actual load rather than the size of the main panel.
RE: Utility Service Sizing
RE: Utility Service Sizing
Of the four above they vary with climate. They all vary with square footage and the type of heating ( gas or electric) and type of water heaters.
The NEC has some (Sec 210 or their abouts) you can use.
I am traveling and don't have the exact section.
You don't have to have the exact square footage if you know the type of developement ( small house or McMansions).
RE: Utility Service Sizing
RE: Utility Service Sizing
I have an old SDG&E guide for commercial loading that uses service panel sizing as one estimating means with a different % for different types of businesses, ranging from 25% to 48% of service panel size. This would be of no use for residential, however.