Licensed Electrical Contractor Electrical Codes & Standards 2

Question 1

Under NEC Article 210, what is the minimum number of 20-ampere small-appliance branch circuits required for a kitchen countertop in a dwelling unit?

Accepted Answer

Two 20-ampere circuits

Answer

NEC 210.11(C)(1) requires at least two 20-ampere small-appliance branch circuits for kitchen countertop receptacles.

Question 2

NEC Article 230 governs services. What is the maximum height above grade level for a service entrance conductor attachment point on a building?

Accepted Answer

30 feet

Answer

NEC 230.24(A) limits service-drop attachment height to 30 feet above grade at the point of attachment.

Question 3

According to NEC 250.66, the size of the grounding electrode conductor for a copper service entrance conductor of 3/0 AWG is:

Accepted Answer

4 AWG copper

Answer

NEC Table 250.66 specifies a 4 AWG copper grounding electrode conductor for a 3/0 AWG copper service conductor.

Question 4

What NEC article specifically covers wiring methods and installation of conduit fill calculations?

Accepted Answer

Chapter 9 Tables

Answer

Chapter 9 Tables of the NEC provide the fill calculations used for determining conduit and tubing fill percentages.

Question 5

Under NEC 210.52, GFCI protection is required for all receptacles within how many feet of the outside edge of a bathroom sink?

Accepted Answer

6 feet

Answer

NEC 210.52(D) requires GFCI-protected receptacles for all outlets within 6 feet of the outside edge of a bathroom sink.

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