Journeyman Electrician 26 Exam Questions & Answers 2026 (21–30)

Question 1

Where must the service disconnecting means be located?

TheoryPractice · Accepted Answer

At the nearest point of entrance of the service conductors inside or outside the building. NEC 230.70(A)(1) requires the service disconnecting means to be installed at a readily accessible location, either outside the building/structure or inside nearest the point of entry of the service conductors.

Question 2

Branch circuit conductors must be protected by an overcurrent device at the point where:

TheoryPractice · Accepted Answer

They receive their supply. Overcurrent protection for branch circuit conductors must be located at the point where the conductors receive their supply (the panelboard or source). This protects the conductors from excessive current.

Question 3

A single non-motor load is rated as a continuous load. The branch circuit overcurrent device must be rated at no less than:

TheoryPractice · Accepted Answer

125% of the load current. Per NEC 210.20(A), the overcurrent device for a branch circuit supplying a continuous load must have a rating of at least 125% of the continuous load current to prevent nuisance tripping during sustained operation.

Question 4

Under the 10-foot tap rule, which condition must be met regarding conductor ampacity?

TheoryPractice · Accepted Answer

The tap conductor ampacity must be at least 10% of the feeder overcurrent device rating. NEC 240.21(B)(1) allows a 10-foot tap without overcurrent protection at the tap point if the tap conductor has an ampacity at least 1/10 (10%) of the feeder OCPD rating, the tap is in a raceway, and it terminates in a single OCPD.

Question 5

The 25-foot feeder tap rule (NEC 240.21(B)(2)) requires that the tap conductors have an ampacity of at least:

TheoryPractice · Accepted Answer

1/3 of the feeder OCPD rating. Under the 25-foot tap rule, the tap conductors must have an ampacity not less than 1/3 of the rating of the overcurrent device protecting the feeder conductors, and they must terminate in a single breaker or set of fuses.

Question 6

What is the 60°C column ampacity of 10 AWG copper in NEC Table 310.12 for residential branch circuits?

TheoryPractice · Accepted Answer

30 amperes. Per NEC Table 310.12, 10 AWG copper conductors have an ampacity of 30 amperes at 60°C, which is the temperature column used for 15- and 20-ampere residential branch circuits when termination temperature is unknown.

Question 7

When more than three current-carrying conductors are in a raceway, the conductor ampacity must be reduced. What correction factor applies for 4–6 current-carrying conductors in a conduit?

TheoryPractice · Accepted Answer

80% of table value. NEC Table 310.15(C)(1) specifies an 80% (0.80) adjustment factor when 4 to 6 current-carrying conductors are bundled in a raceway or cable to account for heat buildup.

Question 8

GFCI protection for receptacles in bathrooms of dwelling units is required by which NEC article section?

TheoryPractice · Accepted Answer

NEC 210.8(A)(1). NEC 210.8(A)(1) requires GFCI protection for all 125-volt, single-phase, 15- and 20-ampere receptacles in bathrooms of dwelling units to protect against electric shock in wet locations.

Question 9

GFCI protection is required for receptacles located outdoors at dwelling units when:

TheoryPractice · Accepted Answer

All outdoor receptacles at dwelling units regardless of location. NEC 210.8(A)(3) requires GFCI protection for all 125-volt, 15- and 20-ampere receptacles installed outdoors at dwelling units, without restriction to specific outdoor locations.

Question 10

Ground-fault protection of equipment (GFPE) at the service disconnect is required for solidly grounded wye services of more than 150 volts to ground but not exceeding 600 volts phase-to-phase when the service exceeds:

TheoryPractice · Accepted Answer

1,000 amperes. NEC 230.95 requires GFPE at the service disconnect for solidly grounded wye services over 150V to ground (not exceeding 600V phase-to-phase) where the service exceeds 1,000 amperes. This protects against arcing ground faults.

Journeyman Electrician 26 Exam Questions & Answers 2026 (21–30)

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