ToolBelt HQ

What Size Wire for a 200 Amp 240V Main Service?

200 amp service is the standard for modern residential homes. Proper sizing of service entrance conductors is essential for safe and reliable electrical service.

Results

Minimum Wire Size250 AWG
Base Ampacity255A
Adjusted Ampacity265.2A
Temp Correction Factor1.04
Bundling Factor1

Need to adjust these values? Use the full calculator:

Open Full Calculator

Related Calculations