240v circuit breaker in China in Toronto

Are 240 volt circuit breakers safe?

Proper knowledge and tools are essential for safely installing circuit breakers. 240-Volt circuits differ from 120-Volt circuits in wire configuration and function. Safety precautions must be taken due to live electrical components in the panel.

How do you wire a 240 volt circuit breaker?

Connect each hot circuit wire to one of the terminals on the new 240-volt circuit breaker. Depending on how the circuit has been installed, these might be two black wires, a black and a red wire, or a black wire plus a white wire marked with black tape to identify it as a hot wire.

How do you insulate a 240 volt circuit breaker?

Strip about 1/2 inch of insulation from each end of the two hot wires and the green ground wire, using wire strippers. If you are installing a 120/240-volt circuit, also strip the insulated white (neutral) wire. Connect each hot circuit wire to one of the terminals on the new 240-volt circuit breaker.

What is a pure 240 volt circuit?

In a pure 240-volt circuit, however, both insulated wires carry 120 volts of live current and there is no neutral wire at all. These pure 240-volt circuits are sometimes described as "3-wire circuits," since they contain two hot wires plus a bare copper or green insulated grounding wire.