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
A common point of confusion in the field is how continuous-load rules affect garage heaters, workshop heaters, and other fixed electric space-heating equipment. Most of the confusion starts when people blend together: as though they are all the same thing. They are not. This article walks through how the NEC actually applies continuous-load rules using … Read more
Understanding conduit fill ampacity requirements is where many installations go sideways in the field. Conduit fill and conductor ampacity are not the same NEC evaluation. An electrician checks the raceway fill, sees the conductors physically fit within Chapter 9 limits, and assumes the installation is compliant. But conduit fill compliance does not automatically mean ampacity … Read more
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
