Quick Hits

EPISODE 14 — 265.20(B) & (C)

Conductors + Equipment

SLIDE 1 — 265.20(B)

CONDUCTOR PROTECTION

The conductors have to be protected according to the ampacity requirements of:

265.19

So now we're seeing the NEC connect:

265.19 → CONDUCTOR AMPACITY

with

265.20 → OVERCURRENT PROTECTION

SLIDE 2 — 265.20(C)

EQUIPMENT

The OCPD rating or setting must not exceed the value specified by the applicable articles.

Once again:

ARTICLE 265 IS NOT THE ONLY PLACE YOU MAY NEED TO LOOK.

The equipment you're supplying can bring additional requirements.

SLIDE 3 — STUDY THE CONNECTION

Think about Article 265 like this:

LOAD

⬇️

CONDUCTOR AMPACITY — 265.19

⬇️

OCPD — 265.20

⬇️

EQUIPMENT REQUIREMENTS

⬇️

OTHER APPLICABLE ARTICLES

That's how you start navigating the NEC instead of memorizing isolated numbers.

SLIDE 4 — REVIEW ⚡

Which section points conductor protection back to the ampacity requirements of 265.19?

A. 265.4

B. 265.5

C. 265.20(B)

D. 265.63

ANSWER: C

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