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What determines the size of service entrance equipment and number of branch circuits used in a residential home?
Wiki User
∙ 14y ago
Electricians use a service entrance calculation to figure what size entrance to use.
There are computer generated programs that you input all the information on the home
such as rooms and sizes then it will give you the size, then this is checked against the
local codes officer to make sure they agree with the service.
The old fashioned way can be done but the program is faster.
So all the rooms, and sizes and equipment that are in a home determine what size is to be used.
Although computer programs may be faster, you would still be required to know how to do these calculations yourself on a licensing exam.
Load calculations are based on the square footage of a building and type of occupancy, plus special loads added to that. You must follow the current version of the National Electrical Code: Article 220 Branch Circuit, Feeder, and Service Calculations. Article 210 Branch Circuits give requirements for the number of branch circuits.
Wiki User
∙ 14y ago
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