U33 Electrical Principles and Wiring Materials

Watts = volts + amps

• True

• False

Electric meters gauge the amount of electricity used in a month, in kilowatt-hours.

• True

• False

Fuses and circuit breakers are used to protect circuits from damage and fire.

• True

• False

An entrance head _______________.

• is a waterproof device used to attach exterior wires to interior wires of a building.

• converts high voltage from the power lines to 240v for home and farm installations.

• is an assembly of electrical wires, connectors and fasteners used to transmit electricity from the transformer to the service entrance head.

• is a box with fuses or circuit breakers where electricity enters a building.

A transformer _______________.

• is a waterproof device used to attach exterior wires to interior wires of a building.

• converts high voltage from the power lines to 240v for home and farm installations.

• is an assembly of electrical wires, connectors and fasteners used to transmit electricity from the transformer to the service entrance head.

• is a box with fuses or circuit breakers where electricity enters a building.

A service drop _______________.

• is a waterproof device used to attach exterior wires to interior wires of a building.

• converts high voltage from the power lines to 240v for home and farm installations.

• is an assembly of electrical wires, connectors and fasteners used to transmit electricity from the transformer to the service entrance head.

• is a box with fuses or circuit breakers where electricity enters a building.

A service entrance panel _______________.

• is a waterproof device used to attach exterior wires to interior wires of a building.

• converts high voltage from the power lines to 240v for home and farm installations.

• is an assembly of electrical wires, connectors and fasteners used to transmit electricity from the transformer to the service entrance head.

• is a box with fuses or circuit breakers where electricity enters a building.

A circuit breaker must be replaced after it trips, a fuse can be reset if it blows.

• True

• False

Branch circuits fan out from the service entrance panel.

• True

• False

A material that provides great resistance to the flow of electricity.

• insulator

• conductor

• magnet

• conduit