CCI CCI Electrical Systems Inspection 1 — Questions and Answers
Question 1: What is the minimum clearance required between electrical panels and combustible materials per the NEC?
- 3 feet (Correct answer)
- 2 feet
- 18 inches
- 4 feet
Correct answer: 3 feet
The NEC requires a minimum 3-foot working clearance in front of electrical panels to allow safe access and operation.
Question 2: During a rough-in inspection, what must a construction inspector verify about electrical conduit bends?
- No more than 360 degrees total bends between pull points (Correct answer)
- No more than 270 degrees total bends between pull points
- No more than 180 degrees total bends between pull points
- No more than 90 degrees total bends between pull points
Correct answer: No more than 360 degrees total bends between pull points
The NEC limits total conduit bends between pull points or boxes to 360 degrees to ensure wire can be pulled through without damage.
Question 3: Which wire gauge is the minimum required for a standard 20-amp branch circuit in residential construction per NEC?
- 12 AWG (Correct answer)
- 14 AWG
- 10 AWG
- 8 AWG
Correct answer: 12 AWG
A 20-amp circuit requires a minimum of 12 AWG copper wire to safely carry the rated current without overheating.
Question 4: What does a CCI inspector look for when verifying GFCI protection in a bathroom?
- All receptacles within 6 feet of a water source must be GFCI protected (Correct answer)
- Only receptacles directly above sinks require GFCI protection
- GFCI is only required in bathrooms with two or more sinks
- GFCI protection is optional if a GFCI breaker is used
Correct answer: All receptacles within 6 feet of a water source must be GFCI protected
NEC requires GFCI protection for all bathroom receptacles regardless of distance from water sources, with the 6-foot rule applying to kitchen countertop receptacles.
Question 5: When inspecting electrical grounding, which conductor color is designated for the equipment grounding conductor in US wiring?
- Green or bare copper (Correct answer)
- White or gray
- Black
- Red
Correct answer: Green or bare copper
The NEC designates green insulation or bare copper as the equipment grounding conductor, which must not be used for any other purpose.
Question 6: What is the maximum allowable voltage drop on a branch circuit per NEC recommended practice?
- 3% (Correct answer)
- 5%
- 10%
- 2%
Correct answer: 3%
The NEC recommends a maximum 3% voltage drop on branch circuits to maintain adequate voltage for connected equipment.
CCI CCI Electrical Systems Inspection 1
What is the minimum clearance required between electrical panels and combustible materials per the NEC?