Licensed Electrical Contractor Electrical Contractor Electrical Codes & Standards 3

Question 1

Under the NEC, what is the maximum number of disconnects permitted to serve as the service disconnecting means for a building?

Accepted Answer

6

Answer

NEC Section 230.71 limits the number of service disconnects to a maximum of six grouped in one location.

Question 2

Which NEC article governs the installation of emergency power systems in commercial buildings?

Accepted Answer

Article 700

Answer

NEC Article 700 covers emergency systems that are legally required and classified as essential for safety to human life.

Question 3

Per OSHA's electrical safety standards (29 CFR 1926 Subpart K), what is the assured equipment grounding conductor program an alternative to?

Accepted Answer

Using GFCIs on construction sites

Answer

OSHA 29 CFR 1926.404(b)(1) allows an assured equipment grounding conductor program as an alternative to GFCI protection on construction sites.

Question 4

According to the NEC, receptacle outlets in dwelling unit bathrooms must be supplied by at least how many 20-ampere branch circuits?

Accepted Answer

One dedicated 20A circuit

Answer

NEC Section 210.11(C)(3) requires at least one 20-ampere branch circuit to supply bathroom receptacle outlets.

Question 5

What edition year of the NEC first introduced requirements for arc-fault circuit interrupter (AFCI) protection in dwelling bedrooms?

Accepted Answer

1999

Answer

The 1999 edition of the NEC (NFPA 70) first required AFCI protection for bedroom branch circuits in dwelling units.

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