Exam 5: Switches and Receptacles

When the wiring method is cable, you are stuck with the conductor insulation colors typically provided by the manufacturer. For three conductor cable, this will typically be black, white, and ____.

Isolated ground receptacles are required by NEC 406.3(D) to have a(n)____ triangle on their face.

An acceptable impedance for the grounding path associated with normal equipment grounding for branch-circuit wiring is ____ ohms.

How common are double-pole switches, and where are they used?

A ____ switch is used where it is desired to control a light or group of lights, or other load, from one switching point.

How are snap switches and metal faceplates grounded?

How do you prevent neutral conductors from overheating?

The differences in plugs and receptacles are based on the ____ and voltage rating of the device.

What is electrical noise, and what is its source?

Quality voltage provides a clean ____ wave that is free from distortion.

To reduce "electrical noise" (electromagnetic interference), circuits with receptacle outlets that serve loads such as cash registers, computers, or other sensitive electronic equipment are often supplied by ____ receptacles.

A 3-way switch has a common terminal to which the switch blade is always connected, and it has two other terminals called ____ terminals.

Most electricians refer to ____ switches as "toggle switches" or "wall switches."

An ungrounded conductor is also known as a ____ conductor.

When using cable for the wiring of 3-way switches, NEC 200.7(C)(1)permits the use of a conductor with insulation that is white or ____ or has three continuous white stripes (not too common)as a switch supply only if the conductor is permanently reidentified by painting or other effective means.

The cover placed on a recessed box containing a receptacle or a switch is called a ____.

In locations where severe abuse or heavy use is expected, ____ receptacles are recommended.

What is the difference between the acceptable impedance of a ground path for branch-circuit wiring and the acceptable impedance for electronic equipment?

An ac-dc general-use snap switch is always marked with the ____.

In commercial buildings, ____ protection is required for all 125-volt through 250-volt , single-phase 50-ampere receptacles  or less, and three-phase 100 amperes or less,  installed in bathrooms, in kitchens, on rooftops, outdoors, within 6 ft (1.8 m)from the outside edge of any sink, in indoor  damp and  wet locations, in locker rooms with associated shower facilities, garages,  accessory buildings, service bays, and similar areas , crawl spaces, unfinished areas of basements, laundry areas, and bathtubs and shower stalls.