When installing more than two conductors in a conduit or tubing, the maximum percentage of fill allowed by the NEC is __________.

Question

Quizplus · Accepted Answer

The NEC allows a maximum of 40% fill when installing more than two conductors in a conduit or tubing. This is to ensure that there is enough room for the conductors to dissipate heat and for future maintenance or installation. Exceeding this maximum percentage of fill can lead to overheating, reduced lifespan of the conductors, and difficulty with future maintenance.

When Installing More Than Two Conductors in a Conduit or Tubing