NEC glossary

Overcurrent Protective Device (OCPD)

A fuse or circuit breaker rated to interrupt a circuit when current exceeds a predetermined value, protecting conductors and equipment; standard OCPD ampere ratings are listed in NEC 240.6(A).

NEC reference
240.6

In development The full guide is being written ahead of Loomi's launch. Drop your email on the homepage to be notified when it's live.

Loomi · NEC exam prep

Practice the NEC questions behind this.

Loomi turns these calcs into 12,900+ timed, NEC-referenced exam questions, with spaced repetition that hammers your weak spots. Try everything free for 3 days at launch.

Get launch access