Understanding Branch Circuits and Wiring

What is a branch circuit?

• A circuit that supplies power to the main panel

• A circuit that supplies power to one or more outlets or devices

• A circuit that connects two main panels

• A circuit that is used only for lighting

Which of the following is a type of branch circuit?

• Series circuit

• Parallel circuit

• General-purpose circuit

• Short circuit

What is the primary material used for residential wiring?

• Copper

• Aluminum

• Steel

• Plastic

Which wiring method is commonly used in commercial buildings?

• Knob and tube

• Non-metallic sheathed cable

• Armored cable

• Open wiring on insulators

What is the purpose of box fill calculations?

• To determine the number of wires that can safely fit in an electrical box

• To calculate the total load on a circuit

• To measure the voltage drop in a circuit

• To determine the length of wire needed for a circuit

Which of the following is a circuit protection device?

• Resistor

• Capacitor

• Circuit breaker

• Transformer

What is the formula for calculating the load on a circuit?

How many cubic inches are required for a 12-gauge wire in a box fill calculation?

• 1.5 cubic inches

• 2.0 cubic inches

• 2.25 cubic inches

• 2.5 cubic inches

What is the maximum load for a 15-amp branch circuit?

• 1200 watts

• 1440 watts

• 1800 watts

• 2400 watts

Which of the following is NOT a type of branch circuit?

• Individual circuit

• Multi-wire branch circuit

• Dedicated circuit

• Series circuit