As always, many changes to the rules for establishing conductor ampacities have been made, including requirements for cable bundling, rooftop temperature correction, and dwelling service conductor sizing. (A) General Requirements. (1) Tables for Engineering Supervision. The ampacity of a conductor can be determined either by using the tables in accordance with Sec. 310.15(B), or under engineering supervision as provided in 310.15(C). Note 1: Ampacities provided by this section ...

Website Registration Required to Access this Content

Only registered users have access to Silver content. 

Registration on EC&M allows you exclusive access to high value content centered around proprietary research, expert NEC analysis and in-depth technical procedures.

Already registered? here.