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Ground Fault Circuit Interrupters

What is a ground fault?

A ground fault in a circuit, extension cord, tool or appliance permits electrical current to flow from the live wire to ground. A person can be seriously injured or killed if they are in the path of the electrical current flowing to ground. Faults usually occur from worn insulation, moisture or deterioration in tools due to age or neglect. For example, cutting a damp lawn with an electric mower using a frayed extension cord.

The ground fault circuit interrupter or GFCI provides you and your family with almost instant protection from a potentially fatal electrical shock caused by a ground fault.

How does a ground fault circuit interrupter work?

The ground fault circuit interrupter almost instantly senses an electrical ground fault. In a fraction of a second it interrupts or opens the protected circuit, stopping the flow electrical current before someone is hurt.

Ground fault circuit interrupter's required by Law

All outlets in proximity to water sources in new homes, by law, must be supplied from circuits equipped with ground fault circuit interrupters. This includes circuits serving swimming pools and hot tubs. Other locations in the home where ground fault circuit interrupters should be installed are damp locations such as the laundry room, kitchen and basement.
Specially designed portable ground fault circuit interrupters can be taken from place to place to protect you anywhere.

For more information, see the Ontario Building Code -