Continuous Load and Conductor Bundling: The NEC Sequence Most People Get Wrong

Continuous load and conductor bundling rules are a common point of confusion in the field, especially when both NEC evaluations apply to the same branch circuit. Many electricians understand the 125% continuous-load requirement. Many also understand conductor ampacity adjustment for more than three current-carrying conductors. But confusion starts when both conditions exist at the same … Read more

Conductor Ampacity: Why Termination Ratings — Not Wire Insulation — Control the NEC Limits

Conductor ampacity is one of the most misunderstood parts of the NEC. Many installers assume the wire insulation rating controls everything, but in reality, termination ratings and installation conditions determine which ampacity column you are allowed to use. This is where a lot of installations go sideways. Not because the table is confusing — but … Read more