Size feeder conductors to service load or size feeder conductors to main OCP?

[Matt Mckenzie]

Branch circuit you size to the load and breaker with next standard size. Same for a feeder?

 

[ActionDave]

Short question. Short answer 215.3 takes you to 240. After that it's all about the details.

 

[Smart $]

Branch circuit you size to the load and breaker with next standard size. Same for a feeder?

800A and less, yes. 215.2 for minimum feeder conductor size. 215.3 for minimum feeder conductor OCPD.