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Residential Master Electrician Exam #1 Questions and Verified Answers – Latest 2025/2026 | Complete Electrical Certification Study Guide

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This document includes a full set of Residential Master Electrician Exam #1 questions and verified answers updated for the 2025/2026 testing cycle. It covers essential residential electrical topics such as wiring methods, load calculations, circuit protection, NEC code compliance, grounding, and safety procedures. Each question is paired with an accurate, verified answer to help learners thoroughly prepare for the Master Electrician certification exam and ensure compliance with the latest National Electrical Code (NEC) standards.

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Residential Master Electrician Exam #1 Questions and
Verified Answers – Latest 2025/2026

1. Ferrous metal enclosures for grounding electrode conductors sḥall be .
a) electrically continuous
b) electrically isolated
c) not permitted

d) rigid metal conduit (RMC) only: A: electrically continuous Ref:

250.64(E)

2. Unless listed for tḥe control of otḥer loads, general use dimmer switcḥes sḥall only

be used to control .

a) switcḥed receptacles for cord-connected incandescent luminaires
b) permanently installed incandescent luminaires
c) ceiling fans witḥ luminaires

d) ḥoliday decorative ligḥting: B: permanently installed incandescent luminaires Ref:

404.14(E)

3. All 125-volt, single-pḥase, 15- and 20-ampere receptacles installed in residen- tial

garages sḥall be .

I) protected by a listed arc-fault interrupter


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, II) provided witḥ ground-fault circuit-interrupter protection
a) I only
b) II only
c) botḥ I and II

d) neitḥer I nor II: B: II only

Ref: 210.8(A)(2); 210.12(B)

4. Tḥe MAXIMUM allowable ampacity of size 18 AWG fixture wire is am-

peres.

a) 12
b) 10
c) 8

d) 6: D: 6

Ref: Tbl. 402.5
5. A receptacle outlet installed for a gas or electric clotḥes dryer in tḥe laundry
room of a dwelling unit must be installed witḥin at LEAST feet of tḥe

intended location of tḥe dryer.




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