A frayed or cracked cord could cause a shock ... Check the rating labels on the cords and the appliance. If necessary, upgrade to a higher-rated cord.

An expert weighs in on the dangers of pairing extension cords and power strips with certain devices and appliances in your home. Corin Cesaric is a Flex Editor at CNET currently covering home tech.

Watch for frayed cords, overloaded outlets and faulty wiring. Examine appliances, tools, lights, fans, heaters, and electronics for damage. Look behind furniture and appliances for hidden hazards.