An Introduction to a Ground Fault Circuit Interrupter (GFCI) Power Cords

Does your job require the use of corded power tools? Many workers use corded power tools on a daily basis. From drills and miter saws to reciprocating saws and sanders, corded power tools simplify work-related tasks.

Unlike portable power tools, though, corded power tools are connected to a power outlet. As a result, they require proper grounding to protect against shock. You can safely ground your power tools by using a ground fault circuit interrupter (GFCI) power cord.

What Is a GFCI Power Cord? 

A GFCI power cord is a special type of electricity-carrying cord that's designed to protect against shocks. They live up to their namesake by breaking or interrupting the circuit in the event of a ground fault. When a GFCI power cord detects a ground fault, it will disrupt the flow of electricity to the power tool with which it's used.

Ground faults can cause shock. Alternatively, they can damage the power tools or equipment with which they are used. A ground fault is simply an unintentional path of electricity. It occurs between a power source, such as a power outlet, and a device, such as a power tool. GFCI power cords prevent these problems from occurring by automating disrupting the flow of electricity in the event of a ground fault.

How GFCI Power Cords Work

GFCI power cords have a built-in device that's designed to detect ground faults. They look like ordinary power cords. The only difference is that GFCI power cords have a safety device built into them. This safety device is a GFCI.

When connected to a power tool, a GFCI power cord will monitor its current. It will constantly check to see how much electricity is traveling from the wall outlet to the power tool. If the GFCI power cord detects a potentially dangerous amount of electricity, it will disrupt the flow of electricity.

Tips on Using a GFCI Power Cord

You should typically test a GFCI power cord at least once a month. Most GFCI power cords have a button that you can press to test them. Testing will ensure that it's able to detect and disrupt the flow of electricity in the event of a ground fault.

When using a GFCI power cord, make sure it's pressed completely into the wall outlet and the power tool with which it's used. If the prongs are loose in the outlet, for instance, it may fail to sense the current. The GFCI power cord may, in fact, not be able to transmit electricity if the prongs are loose.