The short answer
The Danger of Water and Electricity
Water conducts electricity, so a wet extension cord can deliver a dangerous shock to anyone who touches it or the device plugged into it. Even a small amount of moisture inside the cord's plug or along its length can create a path for current to flow where it should not. This risk applies indoors and outdoors, and it does not matter if the cord appears only slightly damp.
The plastic insulation on an extension cord is meant to keep electricity inside, but water can seep into tiny cracks, around the prongs, or through the cord's ends. Once moisture gets in, it can cause a short circuit that trips your breaker or starts a fire. You should treat any wet cord as a hazard until it is fully dry and inspected.
Steps to Take Right Now
If the cord is plugged in and wet, do not touch it with bare hands. Go to your breaker panel and turn off the power to that outlet first, then unplug the cord using a dry cloth or tool. If the cord is not plugged in, move it away from water and any people or pets, and keep it in a dry, ventilated area.
Do not try to dry the cord with a hair dryer or by placing it near a heater, as heat can melt the insulation. Instead, let it air dry for at least 24 to 48 hours in a room with good airflow. After it is completely dry, check the entire cord for cracks, fraying, or discoloration. If you see any damage, throw it away.
- Turn off power at the breaker before touching a plugged-in wet cord.
- Use dry rubber gloves or a wooden tool to unplug if necessary.
- Air dry the cord for one to two days in a dry room.
- Inspect for cracks, burns, or exposed wire after drying.
- Replace the cord if any damage is visible or if it still feels damp.
- Never use a wet cord with a power strip or surge protector.
When Drying Is Not Enough
Even after drying, an extension cord that got soaked may have internal corrosion that is not visible from the outside. This corrosion can make the cord overheat during normal use or cause intermittent power loss. If the cord was submerged in floodwater or heavily saturated, the safest choice is to discard it and buy a new one.
Floodwater can contain chemicals, salt, or debris that accelerates damage to the copper wiring inside. A cord that looks fine on the outside might fail later, creating a fire risk. When in doubt, do not risk it. A new extension cord costs far less than the potential damage to your home or the danger to your family.
Preventing Water Damage to Cords
Keep extension cords away from areas where water is likely to splash, such as near sinks, bathtubs, or outdoor sprinklers. If you must use a cord outdoors, choose one made for outdoor use and plug it into a ground-fault circuit interrupter (GFCI) outlet. These outlets cut power quickly if they detect a leak, adding a layer of protection.
Store cords in a dry place when not in use, and check them regularly for wear. Avoid running cords under rugs or through doorways where they can be stepped on or pinched. In cold climates, be extra careful with cords used near driveways or walkways where moisture collects from snow and ice melt.
When to Call in the Pros
If a wet extension cord was part of a larger water event, such as a flooded basement or a burst pipe, the surrounding walls, floors, and outlets may also be affected. Water can travel behind drywall and under flooring, causing hidden damage that is not obvious at first. In these cases, a thorough inspection is wise before you plug anything back in.
- Check outlets and switches for signs of water staining.
- Look for damp spots on walls, floors, or ceilings near the incident.
- Dry out the area with fans and dehumidifiers to reduce mold risk.
- Have a professional inspect if water reached behind walls or under flooring.
- Contact an electrician for any outlet that got wet, even if it seems dry.
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Call Now (801) 383-0232Frequently asked questions
Can I dry a wet extension cord in the sun?
Sunlight can help dry the outside, but it will not remove moisture trapped inside the cord's insulation. Set it in a dry, shaded spot with good airflow instead. Wait at least a full day before testing it, and inspect it carefully for any cracks or damage.
What if the cord was plugged in when it got wet?
Turn off the power at the breaker immediately, then unplug the cord using a dry tool. Do not touch the cord or the outlet with wet hands. After unplugging, let the cord dry and inspect it. If the outlet got wet, have an electrician check it before using it again.
Is a wet extension cord safe after it dries?
Not necessarily. Internal corrosion can remain even after the outside feels dry. If the cord was lightly splashed and dried quickly, it may be fine, but if it was soaked or submerged, replace it. When in doubt, throw it out to avoid a shock or fire hazard.