electrical

Those locations that are hazardous because of the present combustible dust, defines a _?.

Class ll location

Which is an example of where a mud ring would be used?

All of the above

What is the trade name for nonmetallic sheathed cable?

Romex

Which NEC Article should be referenced when installing boxes and fittings?

314

Many boxes have a tapped #10-32 hole in the bottom of the box that is used for grounding

True

The steel low voltage bracket attaches to a switch box and is UL listed for low voltage support

True

Which can be used for installation of multiple devices?

Gangable box

Which describes a piece of rigid nonmetallic conduit

All of the above

A pipe or tube designed to enclose and protect conductors or cables from moisture and physical damage, defines ?.

Conduit

Those locations that are hazardous because of the presence of easily ignitable fibers or flyings, but in which the fibers or flyings are not likely to be in suspension in the air in quantities sufficient to produce ignitable mixtures defines a ?.

Class lll location

Those locations in which flammable gasses or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures, define a ?

Class l location

What is used to refer to malleable or aluminum conduit bodies?

Condulet

A ? is a fitting intended to connect two lengths of raceway.

Coupling

A plastic corrugated raceway of circular cross section that is resistant to moisture and chemical

atmospheres, and that is flame retardant defines ?.

Electrical nonmetallic tubing

Generally, steel boxes provide _? fire rating for 4"x 4" or smaller wall openings; always check specific catalog pages for individual compliances.

2 hour

When ordering steel city commercial conduit fittings, the first digit represents ?.

Material

All Steel City electrical metallic tubing (EMT) fittings are made in America.

True

Red Dot" boxes are made from durable die-cast ?.

Aluminum

Steel city emt compression couplings and connectors are not concrete tight

False

Box extender

Low voltage backless bracket

Set screw coupling

Compression coupling