Even a simple extension cord needs to be looked after. It's a shock or fire hazard when deteriorated, worn-out or used improperly. Do you know...

• The two types of extension cords?
• What determines if a cord is suitable?

Two-wire extension cords are used for a small appliance or two. Never use these for power tools unless the tool is double insulated. Three-wire cords are for outdoor appliances and electric power tools. The third wire is a ground. Never plug these cords into an ungrounded electrical outlet. Use three-wire grounded cords with power tools. Two key reminders:

• Never substitute extension cords for permanent wiring, and […]

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