4 Things to Know About Extension Cord Connections

The plug and outlet interfaces are the weak point Even with correct wire gauge, resistance builds at the prongs, receptacle contacts, and where wire meets the plug blade. That resistance turns into heat.

Cheap cords and worn outlets cause trouble Thin or poorly crimped connections inside the plug, loose outlet contacts, and corrosion or dirt on prongs all add resistance. These are common failure points.

Heat comes from junctions, not the wire itself Current flows through a loose handshake between metal parts, generating heat at the connection. A 14-gauge cord rated for 15 amps will still heat up at the plug if the connection is poor.

Check the outlet and toss warm plugs If the outlet is loose, replace it. If the cord’s plug feels warm after moderate use with a space heater or power tool, discard the cord immediately. Not worth the fire risk.