Power strips and extension cords: prevent overheating

More sockets do not mean more available power.

The answer in 2 lines. Plug a power strip directly into a wall outlet, never into another strip. Check its rating and the load of everything connected. Major appliances and space heaters belong directly in appropriate wall outlets. Extension cords are temporary solutions: choose one rated for the equipment and its surroundings. Stop using anything damaged, discolored, loose or unusually hot. A surge protector does not give the outlet or circuit extra capacity.

The first steps

Inspect the whole connection. Look for cracked insulation, damaged plugs, scorch marks and loose connections. Stop using damaged equipment; do not cover the damage with tape and keep using it.
Check capacity. Read the cord or strip label and the connected equipment labels. Add the loads in matching units and stay within all applicable ratings. If the labels or instructions are unclear, do not guess.
Remove connected strips. Plug each power strip directly into a suitable wall outlet. Move major appliances to their appropriate wall outlets. Use the U.S. Fire Administration electrical checklist to review your setup.

Stop: danger

Smoke or flames: get everyone outside and call 911. Do not put water on energized electrical equipment or delay escape to unplug it.
Melting, buzzing or a burning smell: stop using the connection. If you can safely reach a dry, undamaged breaker panel, switch off the affected circuit. Do not handle a hot or sparking plug. Have a licensed electrician check a damaged or overheating wall outlet.

What belongs on a power strip?

A power strip may serve equipment such as lamps, chargers or computer accessories when its instructions allow that use and the combined load stays within its rating. A small-looking device is not automatically a small electrical load: check the label.

The U.S. Fire Administration advises plugging major appliances directly into wall outlets and choosing strips with internal overload protection. Follow its appliance and outlet sections when deciding what to move.

Keep space heaters off strips and extension cords. Follow each appliance's installation instructions; a compatible-looking plug alone does not establish that an outlet or circuit is suitable.

What not to do

Connecting power strips together or joining extension cords to reach farther. Choose a suitable temporary cord or arrange a permanent outlet.
Running cords under rugs, through pinched doorways or beneath furniture where damage and heat may go unnoticed.
Using an indoor-only extension cord outside, even when the weather looks dry.
Repeatedly resetting an overload protector or breaker without correcting the problem.
Treating a surge-protection label as proof that overloading is impossible.

Choose the cord for the job

Check the intended indoor or outdoor use, load rating, length and instructions before connecting equipment. Keep connections away from water and preserve the grounding connection when the equipment requires one. Never remove a grounding prong to make a plug fit.

The Texas Department of Insurance extension-cord fact sheet explains checking ratings, inspecting cords and using ground-fault protection in damp conditions. Use its practical precautions, while recognizing that its workplace-specific rules are not a nationwide household deadline.

If you use a cord reel, read its instructions and any separate wound and unwound ratings. Do not assume a coiled cord can safely carry the same load.

When you need a permanent solution

If an extension cord has become the everyday route to an appliance or workstation, ask a licensed electrician about an appropriately located outlet and the circuit's capacity. Several wall outlets can share a circuit, so spreading plugs around the room does not necessarily remove an overload.

The Honolulu Fire Department safety page illustrates hazardous cord chains and explains temporary use. Compare those warnings with your arrangement. Installation requirements and permits depend on your state and locality; let the electrician confirm what applies.

Good to know

Disconnect by gripping the plug, rather than pulling the cable. Keep enough slack to avoid strain at connections.
A plug that slips out or fits loosely needs attention; stop using that outlet until it is assessed.
Use the CPSC home safety checklist to review extension-cord placement and capacity. Read the electrical sections and correct unsafe arrangements before reuse.

Illustrative example: In Ohio, Jordan adds a space heater to a strip serving a desk. The strip develops a burning smell. Jordan stops using it and safely switches off the circuit. An electrician checks the outlet before reuse. The replacement desk arrangement follows its rating, and the heater uses an appropriate wall outlet directly.

A made-up story, for illustration.

Bobby

Sources, verification, confidence

Verified on November 4, 2026, for the United States. Confidence: high for overload prevention, damaged-cord precautions and direct connection of major appliances; medium for equipment-specific capacity, which must be checked on its label and instructions. Local installation rules vary.