10 Most Common Electrical Mistakes DIYers Make

Installing Cable Without a Clamp

Mistake: Missing clamp

This mistake refers to the absence of clamps to secure cables in electrical boxes. When cables are not properly secured, it can strain the connections and potentially cause damage. In metal boxes, the sharp edges can cut through the insulation on the wires, leading to exposed wires and potential hazards. The specific requirements for cable clamps vary depending on the type and size of the box.

Solution: Install a clamp

The suggested solution involves installing a cable clamp to ensure proper securing of the cables. When installing a clamp, it is important to ensure that the sheathing on the cable is trapped under the clamp, providing a secure connection. Approximately 1/4 inch of sheathing should be visible inside the box.

Some metal boxes come with built-in cable clamps, while others require separate clamps. If the box being used does not include clamps, it is necessary to purchase clamps separately and install them when adding the cable to the box.