GFCIs guard against shock
Electrical codes may require that your shop's outlets have protection called GFCI (ground-fault circuit interrupter), particularly for installations in a basement or garage. GFCI is designed to sense dangerous conditions and shut off the power. This could prevent a serious or even fatal electrical shock.
You can achieve GFCI protection with specially designed receptacles or breakers. Either way, carefully follow the manufacturer's installation instructions to ensure protection. Check the breaker or receptacle monthly by pushing the test button.
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