Journeyman Electrician’s Exam Journeyman Electrician's Panelboards and Switchboards 2

Question 1

Per NEC 110.26(F)(1), the dedicated electrical space above a panelboard extends from the top of the equipment to a height of:

Accepted Answer

6 feet above the equipment or to the structural ceiling, whichever is lower

Answer

NEC 110.26(F)(1) requires the dedicated electrical space to extend from the floor to 6 feet above the equipment or to the structural ceiling, whichever is lower.

Question 2

Which NEC article primarily governs the installation of switchboards, switchgear, and panelboards?

Accepted Answer

Article 408

Answer

NEC Article 408 specifically covers switchboards, switchgear, and panelboards including their construction, installation, and overcurrent protection requirements.

Question 3

Per NEC 408.40, equipment grounding conductors must terminate within a panelboard on:

Accepted Answer

The equipment grounding terminal bar

Answer

NEC 408.40 requires equipment grounding conductors to terminate on the equipment grounding terminal bar provided in the panelboard.

Question 4

When a panelboard serves as service equipment, the neutral conductor must be bonded to the equipment grounding terminal bar via:

Accepted Answer

A main bonding jumper

Answer

Per NEC 250.24(B) and 408.40, when a panelboard serves as service equipment, a main bonding jumper is installed to bond the neutral to the equipment grounding terminal.

Question 5

Per NEC 230.70(A), the service disconnecting means for a building must be installed:

Accepted Answer

At a readily accessible location either outside or inside nearest the point of entrance of the service conductors

Answer

NEC 230.70(A) requires the service disconnect to be at a readily accessible location outside or inside the building nearest the point where the service conductors enter.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Journeyman Electrician's Panelboards and Switchboards 2