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Service Entrance Sizing NEC 230 · 310.16
Determine minimum service size, service entrance conductors, and grounding electrode conductor.
Input Options
Enter your total calculated load as amps directly, or enter VA and voltage to calculate amps.
Enter your total calculated load as amps directly, or enter VA and voltage to calculate amps.
By clicking Apply, you acknowledge that results are for reference only and must be verified by a qualified electrician.
Practical Note
Most residential services are 200A. NEC 230.79 requires minimum 100A for single-family dwellings. Use the Dwelling Load Calculator for the total load that feeds into this tool.
Most residential services are 200A. NEC 230.79 requires minimum 100A for single-family dwellings. Use the Dwelling Load Calculator for the total load that feeds into this tool.
For reference only. Verify all results with the current NEC and local amendments. See Terms of Use.