A mains cable consists of which?

A mains cable consists of which?

• A. Two or three insulated copper wires surrounded by an outer layer of flexible plastic material for insulation used to transport electricity through a device
• B. A single copper wire
• C. Glass fiber core with plastic coating
• D. A bundle of coaxial cables

Answer: (A)

Mains cables are built to carry electrical power safely from the supply to a device, so they have conductors that can carry current and a protective outer layer to insulate and protect them. Inside, there are two or three insulated copper wires—the two-core type carries live and neutral, and a three-core type adds an earth wire for safety. All these wires are enclosed in a flexible plastic outer jacket to keep things insulated and protected from damage. This fits the description because it mentions two or three insulated copper wires surrounded by an outer layer of flexible plastic material used to transport electricity through a device. The others aren’t correct: a single copper wire wouldn’t complete a circuit; glass fiber core with plastic coating isn’t a conductive power cable, and a bundle of coaxial cables is designed for signaling rather than mains power.

Mains cables are built to carry electrical power safely from the supply to a device, so they have conductors that can carry current and a protective outer layer to insulate and protect them. Inside, there are two or three insulated copper wires—the two-core type carries live and neutral, and a three-core type adds an earth wire for safety. All these wires are enclosed in a flexible plastic outer jacket to keep things insulated and protected from damage.

This fits the description because it mentions two or three insulated copper wires surrounded by an outer layer of flexible plastic material used to transport electricity through a device. The others aren’t correct: a single copper wire wouldn’t complete a circuit; glass fiber core with plastic coating isn’t a conductive power cable, and a bundle of coaxial cables is designed for signaling rather than mains power.