CEA NEC Code and Calculations 5

Question 1

Under NEC 210.52, receptacle outlets in a dwelling unit kitchen must be served by at least how many small appliance branch circuits?

Accepted Answer

Two 20-ampere circuits

Answer

NEC 210.52(B)(1) requires at least two 20-ampere small appliance branch circuits for kitchen receptacle outlets.

Question 2

According to the NEC, what is the minimum cover depth for direct-buried Type UF cable under a public sidewalk?

Accepted Answer

24 inches

Answer

NEC Table 300.5 requires Type UF cable to be buried at least 24 inches under a public sidewalk or driveway.

Question 3

What is the kVA demand for three household ranges each rated at 12 kW, using NEC Table 220.55?

Accepted Answer

21 kW

Answer

NEC Table 220.55 specifies a demand of 21 kW (maximum demand) for three ranges each rated between 8.75–12 kW using Column C values.

Question 4

The NEC defines a 'qualified person' as someone who has skills and knowledge related to the construction and operation of the electrical equipment and has received which type of training?

Accepted Answer

Safety training on the hazards involved

Answer

NEC Article 100 defines a qualified person as one who has skills, knowledge of electrical equipment, and has received safety training on the hazards involved.

Question 5

Under NEC 250.52, which of the following qualifies as a grounding electrode?

Accepted Answer

A metal underground water pipe in contact with the earth for at least 10 feet

Answer

NEC 250.52(A)(1) permits a metal underground water pipe with at least 10 feet of direct contact with the earth as a grounding electrode.

(CEA) Certified Electrical Apprentice Practice Test

(CEA) Certified Electrical Apprentice Practice Test

CEA NEC Code and Calculations 5