2020 E2 Commercial Electrical Inspector Exam Quiz

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

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

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

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.

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.

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:

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

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

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

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:

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

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

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:

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

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.

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

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 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:

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.