2023 E2 Commercial Electrical Inspector Exam

For a 480-volt, 3-phase panelboard, what is the minimum required depth of the clear working space in front of the equipment if there are exposed live parts on one side and a grounded concrete wall on the other side (Condition 2)?

The minimum width of the working space in front of commercial electrical equipment shall be the width of the equipment or ________, whichever is greater.

When calculating the load for general-use receptacles in a commercial office building, each single or multiple receptacle on one yoke/strap must be calculated at not less than:

Branch-circuit conductors supplying a continuous load (such as commercial store lighting operating for 4 or more hours) must have an ampacity of not less than ________ of the continuous load.

Overhead service conductors passing over a commercial parking lot subject to truck traffic must have a minimum vertical clearance of:

If a metal underground water pipe is used as a grounding electrode, it must be in direct contact with the earth for a minimum of:

The minimum size of an Equipment Grounding Conductor (EGC) is determined based on the:

In commercial kitchens, 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 50 amperes or less must be provided with:

When routing more than ________ current-carrying conductors in a single raceway, the allowable ampacity of each conductor must be reduced (derated) according to NEC adjustment factors.

What is the minimum required cover (burial depth) for direct-buried Rigid Metal Conduit (RMC) installed under a commercial driveway or parking lot?

When calculating box fill, each #12 AWG conductor passing through the box counts as a volume of:

Electrical Metallic Tubing (EMT) must be securely fastened in place within ________ of each outlet box, junction box, or panelboard.

A disconnecting means for a motor must be located "in sight from" the motor location. According to the NEC definition, "in sight from" means it must be visible and not more than ________ away.

A dry-type transformer rated 112.5 kVA or less installed indoors must be separated from combustible materials by a minimum of ________, unless separated by a fire-resistant, heat-insulating barrier.

Luminaires installed in a commercial cooking hood must be identified for the purpose and must be:

A commercial location where ignitable concentrations of flammable gases or vapors can exist under normal operating conditions is classified as:

In patient care spaces of healthcare facilities, branch circuits serving patient care areas must have a redundant grounding system. This requires the use of an insulated copper equipment grounding conductor along with:

A disconnecting means for a commercial electric sign must be located within sight of the sign, OR it must be:

Emergency power systems must be able to automatically supply power to the emergency load within what maximum timeframe after the normal power supply fails?

Informational Note: To provide reasonable efficiency of operation, the NEC recommends that the total combined voltage drop for both the feeder and the branch circuit should not exceed: