CEI Electrical Code & Standards 2

Question 1

Under the NEC, what is the maximum allowed voltage drop for branch circuits to ensure reasonable efficiency of operation?

Accepted Answer

3%

Answer

NEC 210.19(A) informational note recommends limiting branch circuit voltage drop to 3% for reasonable efficiency.

Question 2

Which NEC article governs the installation of patient care areas in health care facilities?

Accepted Answer

Article 517

Answer

NEC Article 517 covers electrical wiring and equipment installed in health care facilities including patient care areas.

Question 3

According to the NEC, a 20-ampere, 125-volt receptacle installed outdoors must be protected by which of the following?

Accepted Answer

GFCI

Answer

NEC 210.8(A) requires GFCI protection for 125-volt receptacles installed in outdoor locations.

Question 4

What is the minimum clearance required by the NEC between the top of a service entrance conductor and a window that opens?

Accepted Answer

3 feet

Answer

NEC 230.9(A) requires service conductors to be at least 3 feet from windows that open.

Question 5

Which NEC article specifically addresses the installation of solar photovoltaic (PV) systems?

Accepted Answer

Article 690

Answer

NEC Article 690 covers the installation of solar photovoltaic energy systems.

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