Exam 16: Branch Circuits for the Garage and Outdoors

Type UF "underground feeder" cable ____ permitted to be used to supply service entrances.

To provide shock protection, low-voltage wiring systems are required by Article 411 to be ____.

The last sentence of 250.4(A)(5) states that "the earth shall not be considered as an effective ____________________."

The minimum depth for a 120-volt, 15-ampere, GFCI-protected circuit to an outdoor pole light run under a paved driveway is ____.

What type of cable is permitted to be used for direct burial applications?

Minimum cover requirements for direct-buried cables and raceways under a variety of conditions are given in Table ____________________.

Outdoor lighting fixtures and associated equipment ____ permitted to be supported by trees.

Direct-burial cable is normally required to have a minimum of 24 inches of earth cover. Explain the conditions under which the minimum depth can be reduced to 12 inches for residential occupancies.

When outdoor receptacles are installed where a cord will be plugged in permanently, such as for decorative lighting, the box cover ____ maintain weatherproof integrity when the cord is plugged in.

Explain why, in colder parts of the country, incandescent fixtures are more suitable than fluorescent for unheated spaces like garages.

Metallic conduit buried underground must be protected against ____.

Permanent overhead conductor spans are permitted to be supported by live or dead vegetation, such as trees.

Explain the rationale for installing supplemental overcurrent protection, such as a "box cover unit" with a switch and fuse combination, to protect an appliance or utilization equipment such as a garage door opener.

Conductors suitable for use in ____________________ locations will have the letter "W" in their type designation.

Explain why a post lamp cannot be grounded only with a local ground rod, but must have a separate grounding equipment conductor going back to the residential service.

The recommended approach to provide adequate lighting in a residential garage is to install one ____-watt lamp on the ceiling above each side of an automobile.

If you are experiencing too much lamp burnout in your garage door opener, the culprit is probably vibration.

Article ____________________ covers low-voltage lighting systems operating at 30 volts RMS or less.

Overhead conductors ____ permitted to be supported by trees.

According to NEC 210.52(G), at least ____ receptacle(s) must be installed in an attached residential garage.