You should not use a portable electric tool unless it has a

You should not use a portable electric tool unless it has a

• A. Double insulated cord
• B. Grounded plug
• C. A double insulated cord or a grounded plug
• D. A battery-powered option

Answer: (C)

Electrical safety for portable tools hinges on protective features that prevent shock if something else fails. A grounded plug provides a low-resistance path to earth for any fault current, which helps trip the circuit and stop a shock from reaching you. Double insulation means the tool itself is built with two layers of insulation and no exposed conductive parts, so even if the outer layer is damaged, you’re protected. Because of these two reliable approaches, you should only use a portable electric tool if it has one of them—either a double-insulated design or a grounded plug. A battery-powered option isn’t what this rule is about, even though it avoids cord-related risks; the standard described specifically calls for the protective features on corded tools.

Electrical safety for portable tools hinges on protective features that prevent shock if something else fails. A grounded plug provides a low-resistance path to earth for any fault current, which helps trip the circuit and stop a shock from reaching you. Double insulation means the tool itself is built with two layers of insulation and no exposed conductive parts, so even if the outer layer is damaged, you’re protected. Because of these two reliable approaches, you should only use a portable electric tool if it has one of them—either a double-insulated design or a grounded plug. A battery-powered option isn’t what this rule is about, even though it avoids cord-related risks; the standard described specifically calls for the protective features on corded tools.