Texas Journeyman Electrician Practice Test

Which NEC article contains the definitions that apply throughout the Code?

General definitions are collected in Article 100; Article 90 is the introduction and Article 110 holds general installation requirements.

What is the minimum rating of the service disconnecting means for a one-family dwelling?

A one-family dwelling needs a service disconnect rated at least 100 A, 3-wire.

Which conductors are "feeders"?

Feeders run from the service equipment, a separately derived system or other source to the final branch-circuit overcurrent device. Branch circuits start after that device.

How many 20 A small-appliance branch circuits, at minimum, must serve the kitchen countertop receptacles of a dwelling?

At least two 20 A small-appliance branch circuits are required for the kitchen, pantry and dining receptacles.

Which NEC article covers nonmetallic-sheathed cable (Type NM)?

Type NM cable is in Article 334. 320 is armored cable (AC), 330 is metal-clad cable (MC) and 338 is service-entrance cable.

For a 120/240 V panelboard (150 V or less to ground) with exposed live parts on one side and no live or grounded parts on the other (Condition 1), what is the minimum depth of working space?

At 0-150 V to ground the minimum working-space depth is 3 ft for every condition.

Branch-circuit conductors supplying a single continuous-duty motor must have an ampacity of at least what percentage of the motor's full-load current?

Single-motor branch-circuit conductors are sized at 125% of the motor's full-load current.

A motor controller's disconnecting means must generally be located:

The controller disconnect must be within sight of the controller (visible and within 50 ft), with limited exceptions.

Which NEC article covers swimming pools, spas and hot tubs?

Pools, fountains, spas and hot tubs are in Article 680.

Which NEC article covers solar photovoltaic (PV) systems?

Solar PV systems are in Article 690; 705 covers interconnection with other power sources.

As the NEC uses the term "within sight," one piece of equipment must be visible from the other and no more than how far away?

"Within sight" means visible and not more than 50 ft away. The definition is in Article 100.

What is the maximum number of service disconnects permitted for one service?

A service may have up to six disconnects, grouped, as 230.71 sets out.

Feeder conductors that supply continuous and noncontinuous loads must have an ampacity of at least:

Only the continuous portion is increased to 125%; the noncontinuous load is added at 100%.

A dwelling's laundry receptacle outlets must be supplied by at least one branch circuit rated:

At least one 20 A branch circuit is required for the laundry receptacle outlets.

NM cable must be secured within what distance of every box, cabinet or fitting?

Secure NM cable within 12 in of each box or fitting, and at intervals of no more than 4½ ft.

What is the minimum width of the working space in front of electrical equipment?

The working space must be at least 30 in wide or as wide as the equipment, whichever is greater.

When sizing conductors for a general-purpose motor, the full-load current is taken from:

Conductors, short-circuit and ground-fault protection use the full-load current from the Code tables; the nameplate current is used for overload protection.

A circuit breaker used as a disconnect must:

Circuit breakers must clearly show whether they are on or off; vertically mounted handles are on when up.

A Class I hazardous location is one where the hazard comes from:

Class I is flammable gases or vapors; Class II is combustible dust; Class III is ignitible fibers and flyings.

Electric vehicle charging equipment is covered by:

EV power transfer systems, including chargers, are in Article 625.