NHIE Electrical Practice Questions
Domain 1, Task 5 of 13 in the EBPHI content outline · 7% of the exam, about 12 of the 175 scored questions
200 questions across all fifteen sections in 4 hours, with a score for Electrical so you know where you stand.
Free Electrical drillHow is the amperage rating of a residential electrical service determined?
Electrical Systems on the National Home Inspector Exam
Electrical systems are Task 5 of Domain 1 and 7% of the National Home Inspector Exam, about 12 of the 175 scored questions, the largest of the 13 inspection tasks. The questions follow power from the service drop or lateral through the panel to the branch circuits, devices and fixtures, plus generators, solar and electric vehicle charging equipment.
- Share of the exam
- 7% in the official content outline, about 12 of the 175 scored questions
- Our drill
- 10 questions from 37 Electrical questions, untimed, an explanation after every answer; one free attempt, unlimited with a pass
What electrical systems questions test
- Service: drops and laterals, clearances, service entrance conductors, amperage, grounding electrodes and bonding
- Panels and subpanels: neutral and ground separation, conductor sizing and color, breakers and fuses, double taps, over-fusing and known problem panels
- Wiring methods: NM cable, armored cable and conduit, junction boxes, solid aluminum branch wiring and knob-and-tube
- Devices: receptacles and polarity, open grounds, GFCI and AFCI protection and where it is required
- Alternative energy and EV supply equipment: disconnects, transfer switches and back-feed
Sit the full exam under the real clock
200 questions across all fifteen sections in 4 hours, with a score for Electrical so you know where you stand.
Free Electrical drillHow to study it
- Learn conductor sizes against breaker sizes for copper: 14 AWG on 15 amps, 12 AWG on 20 amps, 10 AWG on 30 amps.
- Know why neutrals and grounds are bonded at the service equipment and separated at every subpanel.
- Learn the GFCI locations from the NEC and the defects a plug-in tester can and cannot find.
- Take the electrical drill until you score 80% or better.
Common questions
How many electrical questions are on the NHIE?
Electrical systems are 7% of the exam, about 12 of the 175 scored questions, the largest single inspection task.
Which electrical panels does the NHIE mention?
The outline names known problem panel boards, giving Federal Pacific Stab-Lok and Zinsco/Sylvania as examples.
200 questions across all fifteen sections in 4 hours, with a score for Electrical so you know where you stand.
Free Electrical drillThe other home inspector exam sections
- Site Conditions
- Exterior Components
- Roof Components
- Structural Components
- Cooling Systems
- Heating Systems
- Insulation, Moisture Management and Ventilation
- Mechanical Exhaust Systems
- Plumbing and Fuel Distribution Systems
- Interior Components
- Fireplaces, Fuel-Burning Appliances and Chimneys
- Life Safety Equipment and Systems
- Analysis of Findings and Reporting
- Professional Responsibilities
- Home inspector practice exam (200 questions, 4 hours)
- Mixed drill: all fifteen sections
Sources
- EBPHI: Frequently Asked Questions (questions, time, fee, scoring, retakes)
- EBPHI: Policies, Procedures, Content handbook with the NHIE content outline (© 2023)
- EBPHI: Prepare for the Exam (domains, references, practice quizzes)
- PSI: National Home Inspector Examination candidate bulletin
- EBPHI: State regulations map
- ICC: International Residential Code (IRC) 2021
Original practice questions for exam preparation, written to the EBPHI National Home Inspector Examination content outline (© 2023), not EBPHI exam questions. Independent practice, not affiliated with or endorsed by the Examination Board of Professional Home Inspectors (EBPHI) or PSI. National Home Inspector Examination and NHIE are registered marks of EBPHI.