Chapter 10 EO test

Some portable appliances use double insulation in place of grounding to provide shock protection to users. Double-insulated appliances normally have ____ power cords and attachment plug caps.

2-wire

Describe the two ways that receptacles in bathrooms may be GFCI protected.

The receptacles in bathrooms are required to be GFCI protected, either by installing GFCI receptacles, or by installing GFCI circuit breakers in the panel.

One way to protect people from electrical shock is found on grooming appliances that are equipped with a special attachment plug cap. Under what condition does the plug cap provide protection?

The special attachment plug cap provides protection should the appliance be immersed in water.

A bathroom is defined as "an area including a basin, with one or more of which items?

any of the above

For hallways of ____________________ ft. or more in length, it is required to have at least one receptacle outlet.

10

The NEC permits all bathroom receptacles to be on a single ____ branch circuit so long as it doesn't supply other loads.

20-ampere

Name at least three types of lighting fixtures and other equipment not permitted to be installed within the zone extending 3 feet horizontally and 8 feet vertically from the top of the bathtub rim.

The NEC does not permit cord-connected luminaires; chain-, cable-, or cord-suspended luminaires; lighting track; pendants; or ceiling-suspended (paddle) fans to be located within this zone.

According to NEC 406.9, receptacles ____ permitted to be installed in bathtub and shower spaces.

are not

As defined in Article 100, a bathroom is required to have a ____.

basin

NEC 410.10(D) ____ lighting track to be located within a zone measured 3 ft (900 mm) horizontally and 8 ft (2.5 m) vertically from the top of a bathtub rim or top of a shower stall threshold.

does not permit

With ____ products, it takes two failures to create a shock hazard to the user.

double-insulated

When using nonmetallic-sheathed cable or armored cable, never use the bare equipment grounding conductor as a(n) ____________________ conductor, and never use the grounded circuit conductor as an equipment grounding conductor.

grounded circuit

Recessed or surface-mounted luminaires and recessed exhaust fans ____ be located within the restricted zone near the bathtub.

may

Install luminaires listed for ____ locations if they will be subject to shower spray.

wet

Hanging light fixtures must be kept at least ____________________ feet horizontally and ____________________ feet vertically from the edge of the tub rim.

3, 8

Explain why bathrooms should not have overhead (ceiling) lighting only, but also wall-mounted lighting above or on either side of the mirror.

Mirror lighting is needed for tasks such as shaving, applying makeup, combing hair, and so on. Providing only an overhead lighting will light the top of the head, while causing shadows on the face.

Explain the condition(s) under which a residential hallway is required to have one or more receptacles installed in it.

NEC 210.52(H) states that hallways of 3 m (10 ft) or more in length, shall have at least one receptacle outlet.

Explain why receptacles are not permitted to be installed in bathtub and shower spaces.

Receptacles are not permitted to be installed in bathtub and shower spaces because of the obvious hazards associated with water and electricity.

Explain the circumstance(s) under which switches are allowed to be installed in a tub or shower space.

Switches are allowed to be installed in a tub or shower space only when they are part of a listed tub or shower assembly. Field-installed switches are not permitted in these areas.

Ceiling-suspended paddle fans must not be located within a zone measured ____ horizontally and ____ vertically from the top of the bathtub rim or top of a shower stall threshold.

3 ft (900 mm); 8 ft (2.5 m)