Residential Electrical Wiring Quiz

Residential Electrical Wiring

• Copper, aluminum, and aluminum alloy are commonly used materials for residential electrical wiring.
• Steel is not a commonly used material for residential electrical wiring.

Grounding in Residential Electrical Systems

• The purpose of grounding is to protect against electrical shock.
• Grounding conductors are typically green or bare.

Wiring Methods

• Nonmetallic-sheathed cable is commonly used for residential electrical installations due to its flexibility and ease of installation.
• Conduit wiring, metal-clad wiring, and knob-and-tube wiring are other types of wiring methods.

Junction Boxes

• The purpose of a junction box is to protect the wiring from moisture and damage.

Circuit Breakers

• A characteristic of a circuit breaker is that it can be reset after tripping.
• Circuit breakers do not work only once and do not need replacement after tripping.

Electrical Outlets

• The minimum height requirement for electrical outlets in residential buildings according to the National Electrical Code (NEC) is 12 inches above the floor.

Residential Lighting Fixtures

• Incandescent, fluorescent, neon, and LED are types of residential lighting fixtures.

GFCI Outlets

• The purpose of a GFCI (Ground Fault Circuit Interrupter) outlet is to protect against electrical shock in wet or damp locations.

Switches

• Dimmer switch, thermostat switch, relay switch, and circuit breaker switch are types of switches used in residential lighting control.
• A three-way switch controls a single light fixture from multiple locations.

Electrical Outlets for Large Appliances

• A 240-volt, 20-amp outlet is typically used for large appliances such as refrigerators and washing machines.

Wire Nuts

• The purpose of a wire nut is to join two or more conductors together.

AFCI Devices

• AFCI (Arc-Fault Circuit Interrupter) devices detect and mitigate the risk of electrical fires caused by arcing faults.

Electrical Conduit

• PVC conduit is commonly used for protecting and routing electrical wiring in residential installations.

Underground Residential Electrical Installations

• Direct-buried cable is commonly used for underground residential electrical installations.

Strain Relief Connectors

• The purpose of a strain relief connector is to prevent wires from becoming loose or disconnected.

Electrical Boxes

• Electrical boxes are used for mounting switches and outlets in residential wiring installations.