Test Your Code IQ — August 2025

Courtesy of www.MikeHolt.com.

All questions and answers are based on the 2023 NEC.

Q1: Only wiring methods recognized as _____ are included in the Code.

a) expensive

b) efficient

c) suitable

d) cost-effective

Q2: Securing or supporting of LFNC is not required where installed in lengths not exceeding _____ from the last point where the raceway is securely fastened for connections within an accessible ceiling to a luminaire(s) or other equipment.

a) 4 ft

b) 6 ft

c) 8 ft

d) 10 ft

Q3: Metal multioutlet assemblies can extend through (not run within) dry partitions if arrangements are made for removing the cap or cover on all _____ portions and no outlet is located within the partitions. 

a) exposed

b) concealed

c) uninsulated

d) none of these

Q4: Fuel dispensing systems shall be provided with one or more clearly identified emergency shutoff devices or electrical disconnects. Such devices or disconnects shall be installed in approved locations but not less than 20 ft or more than _____ from the fuel dispensing devices that they serve.

a) 20 ft

b) 40 ft

c) 50 ft

d) 100 ft

Q5: In a 3-wire circuit consisting of two phase conductors and the neutral conductor of a 4-wire, 3-phase, wye-connected system, the neutral conductor shall _____ when applying the provisions of Sec. 310.15(C)(1).

a) be counted

b) not be counted

c) be reduced

d) be ignored

Q6: Galvanized steel and stainless steel EMT, elbows, couplings, and fittings can be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where _____.

a) protected by corrosion protection

b) made of aluminum

c) made of stainless steel

d) listed for wet locations

Answers:

Q1: c) suitable

Per Sec. 110.8: "Only wiring methods recognized as suitable are included in this Code." 

Q2: b) 6 ft

As stated in Sec. 356.30(4), "Securing or supporting of LFNC shall not be required where installed in lengths not exceeding 6 ft from the last point where the raceway is securely fastened for connections within an accessible ceiling to a luminaire(s) or other equipment."

Q3: a) exposed

According to Sec. 380.76, "It shall be permissible to extend a metal multi-outlet assembly through dry partitions if arrangements are made for removing the cap or cover on all exposed portions and no outlet is located within the partitions."

Q4: d) 100 ft

Per Sec. 514.11(A): "Fuel dispensing systems shall be provided with one or more clearly identified emergency shutoff devices or electrical disconnects. Such devices or disconnects shall be installed in approved locations but not less than 20 ft or more than 100 ft from the fuel dispensing devices that they serve."

Q5: a) be counted

According to Sec. 310.15(E)(2), the neutral conductor "shall be counted when applying Sec. 310.15(C)(1)."

Q6: a) protected by corrosion protection

As stated in Sec. 358.10(B)(1), "Galvanized steel and stainless steel EMT, elbows, and fittings shall be permitted to be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where protected by corrosion protection and approved as suitable for the condition."

These materials are provided by Mike Holt Enterprises in Leesburg, Fla. To view Code training materials offered by this company, visit www.mikeholt.com/code.