Basics of Home Electrical Wiring

What is the purpose of a service head in home electrical wiring?

• To protect the home from electrical surges

• To measure the electricity usage

• To supply power to lights and appliances

• To connect the home to the internet

What does a 240-volt circuit require?

• A special type of outlet

• A transformer

• Both 120-volt wires and the neutral wire

• A single 120-volt wire

What unit is used to express electromotive force?

• Volt

• Joule

• Watt

• Ampere

What does 'MCB' stand for?

• Major Circuit Breaker

• Miniature Circuit Breaker

• Manual Control Base

• Maximum Capacity Box

What color wires are typically used for grounding?

• Green or Bare Copper

• Blue and Yellow

• Black and Red

• White and Gray

What gauge sizes are most common for residential wiring?

• 10 and 8

• 16 and 14

• 14 and 12

• 20 and 18

What should you do before starting any DIY electrical work?

• Turn off all appliances

• Rewire the entire house

• Check with local building authorities

• Purchase a new toolset

What is the main function of junction boxes?

• To protect connections and contain sparks

• To connect different types of wires

• To serve as a main power switch

• To measure the flow of electricity

What might frequent circuit breaker trips indicate?

• The breaker is functioning properly

• Normal weather conditions

• A need for more outlets

• A potential electrical system issue

What is the main difference between electrical wire and electrical cable?

• Cable assembles two or more wires in a single jacket

• Wire is used outdoors while cable is used indoors

• Wire can carry more electricity than cable

• Cable is insulated while wire is not