CME NEC Code and Theory 2

Question 1

Under NEC Article 210, what is the maximum distance from a doorway that a receptacle outlet must be placed in a dwelling unit wall space?

Accepted Answer

6 feet

Answer

NEC 210.52(A) requires receptacles within 6 feet of any doorway opening in dwelling unit wall spaces.

Question 2

What NEC article covers the installation of transformers and transformer vaults?

Accepted Answer

Article 450

Answer

NEC Article 450 covers transformers and transformer vaults, including their installation requirements.

Question 3

According to NEC 230.24, service-entrance conductors above a residential roof must maintain a minimum clearance of how many feet when the roof slope is less than 4 inches in 12?

Accepted Answer

3 feet

Answer

NEC 230.24(A) Exception 2 allows a 3-foot clearance over roofs with a slope less than 4 in 12, provided the service drop doesn't pass more than 4 feet over the roof overhang.

Question 4

NEC 310.15 addresses conductor ampacity. When more than 3 current-carrying conductors are in a raceway, what correction factor applies at exactly 4-6 conductors?

Accepted Answer

0.80

Answer

NEC Table 310.15(C)(1) specifies an 80% (0.80) adjustment factor when 4 to 6 current-carrying conductors are bundled together.

Question 5

Under NEC 404.2(C), a grounded conductor is NOT permitted to serve as the only means of grounding a metal enclosure for a switch. What does this rule require instead?

Accepted Answer

A separate equipment grounding conductor must be run to the switch enclosure

Answer

NEC 404.2(C) requires a separate equipment grounding conductor to be brought to single-pole switch enclosures, prohibiting sole reliance on the grounded (neutral) conductor.

(CME) Certified Master Electrician Practice Test

(CME) Certified Master Electrician Practice Test

CME NEC Code and Theory 2