Several changes to 310.15 include removing the dwelling unit table, dealing with the rooftop issue, and clarifying the bundling rules. Article 310 Conductors and General Wiring 310.15 Conductor Ampacity (B) Ampacity Table. The allowable conductor ampacities listed in Table 310.15(B)(16) are based on conditions where the ambient temperature isn’t greater than 86°F, and no more than three current-carrying conductors are bundled together. (3) Conductor Ampacity Adjustment. (a) ...

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.