Having an outdoor extension cord can be very convenient for powering tools, lights, appliances, and other devices outside your home. However, exposure to the elements can damage cords and create unsafe conditions if not properly protected. Protecting your outdoor extension cord from rain is important to prevent fires, shocks, and other hazards. Fortunately, there are several effective methods to keep your outdoor extension cord safe from moisture.

Why Rain Can Damage Extension Cords

Outdoor extension cords are vulnerable to water damage in several ways:

Corrosion – When moisture seeps into an extension cord, it can cause corrosion of the metal conductors and connection points. This deteriorates the cord over time and increases electrical resistance.
Short Circuits – If water gets inside the cord’s insulation and reaches the live conductors, it can cause shorts. This disrupts the flow of electricity and poses a serious shock and fire hazard.
Ground Faults – Wet conditions can allow electricity to leak from the hot conductor and flow through the ground back to the power source. This can lead to shocks and increase the risk of electrocution.
Appliance Damage – Power tools and other appliances plugged into a wet cord can short out and become damaged themselves.

Protecting your extension cord from rain and moisture is crucial to prevent these hazardous scenarios.

Storing Extension Cords Indoors When Not in Use

The simplest precaution is to disconnect your outdoor extension cord and store it in a dry indoor area when it is not being used. Garages, basements, and storage rooms make ideal places to keep cords out of the rain.

Benefits:

Prevents moisture from accumulating in the cord’s insulation and conductors when not in use.
Minimizes damage from sun exposure, which can deteriorate rubber and plastic components over time.
Keeps the cord clean and free of debris.
Prolongs the life of the cord.
Eliminates the need for additional rain protection measures when not in use.

Be sure to completely undo any coils and hang cords vertically to allow moisture to drain out before storing. Wipe off any wet or damp sections with a dry cloth as well.

Using Outdoor-Rated Extension Cords

Extension cords made specifically for outdoor use are designed to withstand exposure to moisture and the elements. Consider investing in an outdoor-rated extension cord for any applications where the cord will be left outside for extended periods.

What makes outdoor cords more rain resistant?

Thicker PVC insulation resistant to moisture penetration.
Waterproof molded plugs and connectors.
More durable, weather-resistant jacket materials.
Meets electrical codes for permanent outdoor installations.

When selecting an outdoor extension cord, choose a heavy-duty model with sufficient length for your needs, but not excessive extra cord. Opt for a grounded, 3-prong plug for added safety as well. Carefully inspect for any cracks or damage before each use.

Keeping Connection Points Above Ground

Even outdoor-rated extension cords are not 100% waterproof, especially at connection points. Elevating off the ground helps prevent puddles and runoff from pooling around the cord.

Tips for keeping connections dry:

Coil excess cord and hang it on a hook or nail above the ground when possible.
Place the cord on top of steps, patio stones, or a wooden platform to avoid direct ground contact.
Hang the cord from overhead supports like rain gutters when available.
Use a plastic cord reel to keep the majority of the cord neatly coiled off the ground until needed.
Position appliances and tools up on tables or benches when in use to keep plugs elevated.

Avoid running cords through wet grass or muddy areas. Keeping connection points well above ground level will minimize rainwater exposure.

Using Outdoor Extension Cord Covers

Outdoor extension cord covers provide an extra layer of water protection when cords must run along the ground. Choose a cover sized to fit the cord diameter without being overly tight.

Benefits of a cord cover:

Prevents puddles from splashing directly on the cord.
Keeps mud and debris out of the connection points.
Allows cords to be safely used in wet areas.
Made of durable vinyl or rubber to withstand weather.
Provides added padding to reduce cord wear.
Available in a wide range of lengths.

Position the cover so connections are fully underneath it. Seal ends with tie wraps or tape if not self-sealing. Inspect periodically for any gaps or tears requiring repair.

Wrapping Connection Points in Plastic

For temporary protection, you can cover a cord’s plugs, sockets, and couplings with plastic bags or wrap. This creates a DIY moisture barrier when used in conjunction with other methods.

Materials that can be used:

Plastic shopping bags.
Plastic food storage bags.
Press and seal wrap.
Electrical tape.
Duct tape.
Self-fusing rubber tape.
Rubber balloons.
Clear laboratory film.
Waterproof vinyl sleeves.
Custom cut flexible plastic sheeting.

Secure the plastic tightly with electrical tape or other wrapping. Avoid using materials that retain moisture like cloth or paper. Inspect frequently and replace any torn plastic immediately.

Installing Drip Loops to Drain Moisture

Creating drip loops along the extension cord is another handy tactic to deal with unavoidable rain or sprinkler exposure.

Creating a drip loop:

Loop the cord down and then back up, so water drips off the bottom of the U-shaped bend.
Position drip loops wherever water can pool, such as near plugs.
Make the loops proportional to the cord length between connection points.
Use tape or ties to keep the cord from straightening out.
Site drip loops so drips avoid any electrical components.

Drip loops effectively drain water off before it can penetrate into the cord. Employ them at strategic points when an elevated or covered position is not possible.

Using Outdoor Receptacle Covers

Outdoor receptacle covers provide protection for your extension cord plugs when connecting to exterior outlets. Choose covers listed for wet locations.

Benefits of outdoor receptacle covers:

Protects plugs and receptacles from direct rain exposure.
Prevents moisture buildup inside outlets.
Flexible covers accommodate varied plugs and adapters.
Durable covers withstand sun, heat, cold, and contaminants.
Self-closing designs keep covers in place.
Metallic versions ground the outlet for added safety.
Models available with flip lids or side entry for convenience.

Ensure the cover forms a tight seal and inspect it before each use. Test ground fault circuit interrupter (GFCI) outlets monthly by pressing the test button.

Using Appliances with Built-In Rain Protection

For outdoor power tools and appliances, look for models with sealed housings, insulated grips, and double insulation for improved moisture resistance. Some feature attachments for air drying as well.

Benefits of tools with integrated rain protection:

Insulated grips reduce shock hazards from wet hands.
Sealed connections prevent water from entering.
Motors and controls are protected internally.
Can often be safely used in light rain.
Separate cord protection may not be required.
Often meets OSHA standards for water-resistant tools.
Reduces appliance damage risks.

When supplied power cords still require an extension cord, choose a shorter length and minimal capacity needed to reduce exposure.

Inspecting Cords Frequently for Damage

No matter what precautions are taken, periodically inspect extension cords for any signs of water damage or wear.

What to look for:

Cracked, brittle, or discolored insulation.
Kinked or crushed sections.
Melting near connection points.
Corrosion on plug blades or receptacles.
Loose plugs or sockets.
Exposed copper conductors.
Shorts indicated by sparked or blackened areas.

Immediately replace the cord if any hazardous conditions are found. Periodic inspection provides an added measure of safety.

Remove Bathroom Extension Cords

Avoid using bathroom and other indoor extension cords outdoors. Bathroom cords do not have the durability to withstand moisture and weather extremes. The thinner insulation is quickly compromised.

Hazards of using indoor cords outside:

Insulation damage leading to shorts.
Corrosion of plugs from water exposure.
Easy overloading from outdoor power demands.
Lack of abrasion resistance.
Unsafe in puddles due to absence of grounding.

Restrict bathroom and lamp extension cords to temporary indoor applications only. Utilize heavy-duty outdoor cords outside the home.

Storing Coiled Cords in a Waterproof Container

When extension cords must be left coiled outside for an extended time, place them inside a sealed plastic bin, bag, or other waterproof container.

Suitable waterproof storage containers:

Plastic toolboxes or utility bins with gasketed lids.
Heavy-duty plastic storage bins.
Waterproof tool bags.
Plastic ammo cans or picnic coolers.
Sealed tote bins or buckets.
Large plastic zipper bags.
Weather-resistant nylon stuff sacks.
Trash bags sealed with tape or ties.

Ensure cords are dry before storing. Check containers periodically for any leaks or moisture buildup.

Using Temporary Rain Shelters and Sun Shades

For outdoor events and work sites, erect a temporary shelter over areas where extension cords are in use. Choose shelters specifically designed for rain protection.

Ideal temporary rain shelters:

Pop up canopies with waterproof tops.
Outdoor tents and tarps anchored securely.
Plastic sheets and tarps tied over a framework.
Gazebos with rain flaps installed.
Beach umbrellas or oversized golf umbrellas.

Position shelters so cords are fully underneath, allowing rain runoff to drip freely from the edges. Avoid pooling water on top of shelters.

Covering Cords With Rubber Outdoor Flooring

For cords stretched across the ground in outdoor walking areas, affix rubber mats on top for added weatherproofing.

Ideal materials to cover cords:

Rubber commercial flooring tiles.
Interlocking rubber patio pavers.
Horse stall mats.
Rubber rollout mats.
Rubber-backed outdoor carpeting.
Foam play mats.
Yoga mats.

Check that mats fully cover cords before affixing in place with tape, stakes or weights. Avoid creating a trip hazard with raised edges.

Using Outdoor Cable Protectors

Plastic cable protectors that span between two points provide both a bridge and cover to shield extension cords. Choose oversized types that fully enclose cords.

Benefits of cable protectors:

Allows cords to cross high traffic areas safely.
Ridged surface prevents tripping.
Cushions and secures cord.
Models rated for all weather conditions.
Available in a range of lengths.
Channels keep cord contained neatly.

Position protectors so open side faces down. Weigh or stake ends so they don’t shift out of place. Keep areas around protectors free of debris.

Hanging Cords from Overhead Supports

In outdoor areas with posts, beams, or other solid structural supports, you can hang extension cords overhead and out of the rain.

Tips for overhead cord runs:

Use insulated S-hooks, J-hooks, and D-rings to suspend cords.
Space hooks no more than 12 inches apart for support.
Position cords high enough to avoid contact by people and equipment underneath.
Allow slack so cords don’t pull tight between spans.
Use strain relief devices to attach cords without pulling on connections.

Inspect installation points regularly to verify hooks and cords are intact and secure. This approach can provide reliable protection across a wide area.

Removing Cords When Not in Use

Avoid the temptation to leave extension cords plugged in outdoors when not needed. Aside from tripping hazards, unchecked electrical loads can lead to fires.

Safety practices for disconnecting cords:

Unplug cords at the outlet before disconnecting appliances.
Coil cords loosely to avoid kinks.
Wipe down and dry cords before storage if wet.
Position cords so rain can drain out.
Check for damage before reusing.
Label cords for designated uses.

Establishing procedures for proper cord removal enhances safety and reduces weathering when not in use.

Waterproofing End Connections with Heat Shrink Wrap

For additional water resistance, you can cut heat shrink tubing to fit snugly over any extension cord plugs and connectors. Once heated, the thin plastic shrinks tightly around the plug.

Applying heat shrink connections:

Clean connection points so wrap sits flush.
Cut tubing about 1-2 inches longer than plug diameter.
Slide tubing over plug with seam facing out.
Apply heat gun until tubing closely conforms to shape.
Seal seam edge with additional adhesive lined tubing.
Test grounding before using protected plug.

Monitor protected plugs closely for tubing tears or gaps requiring reapplication. Avoid overheating during application.

Using Weather Resistant Adhesive Sealant

Caulking and sealants meant for outdoor use provide another protective option for plugs and connectors prone to moisture exposure.

Application tips for adhesives:

Clean and dry connection points thoroughly first.
Mask areas not being sealed to keep neat.
Use minimal amount needed for full coverage.
Smooth sealant using a plastic spreader.
Allow full curing time before use per directions.
Apply sparingly to avoid insulating plug blades.
Reapply after checking integrity periodically.

Choose flexible, waterproof sealant that will adhere well to the cord jacket and plug surfaces to create a robust moisture barrier.

Burying Sections of Cord Underground

For semi-permanent installations, short sections of outdoor-rated extension cord can be buried underground to provide discretion and avoid tripping hazards.

Considerations for underground cord burial:

Use only listed, watertight direct burial cable.
Bury at proper depth according to electrical code.
Avoid burial under paved surfaces or areas prone to digging.
Carefully backfill and tamp earth without damaging cord.
Run remainder of cord above ground to accessible outlet.
Mark location well for future reference.

Take care not to over-tighten or kink cord when laying in trench. Avoid burying ordinary extension cords underground.

FAQs Related to Protecting Extension Cords from Rain

Q: Can I use a household extension cord outdoors?

A: Household extension cords are intended only for indoor use and will quickly degrade outdoors. Invest in a durable, outdoor-rated cord for any outdoor applications, even temporary ones.

Q: What length of extension cord is safe to use?

A: The longer the extension cord, the greater the voltage drop across its length. Keep runs under 100 feet, use appropriately sized wire gauge for the amp rating, and minimize lengths whenever possible.

Q: Can I cover an extension cord with a metal shield?

A: No, enclosing cords in solid metal prohibits heat dissipation, which builds up and damages the insulation over time. Use specially designed cable protectors with ventilation.

Q: Is electrical tape sufficient for waterproofing connections?

A: While cheaper and easier to apply, tape alone does not provide a reliable moisture seal. Combine tape with additional covers like heat shrink or sealant for better protection.

Q: Can I submerge outdoor extension cords in water?

A: No, even cords made for outdoor use have limitations. Avoid submerging them or letting puddles cover connections. Keep plugs and outlets well above ground when in use.

Q: Should I unplug cords at night and during rain storms?

A: Yes, provided it can be done safely. Disconnecting all devices when not in use is advisable to avoid potential electrical hazards and decrease cord weathering.

Q: What gauge wire should I choose for an outdoor extension cord?

A: Heavier gauges like 12 or 10 allow you to safely power most outdoor tools and equipment. Never use 18-gauge cords outside.

Q: Is there a risk to covering cords with a doormat or carpeting?

A: Yes, the lack of ventilation could lead to overheating. Use outdoor-rated cable protectors with airflow channels instead.

Q: Can I use multiple extension cords connected together outside?

A: Chaining cords together increases resistance and reduces voltage to tools. Limit connections and reduce length wherever possible. Use one heavy-duty cord instead.

Conclusion

Protecting outdoor extension cords from rain is easy to overlook until a problem occurs, but taking proper precautions can prevent expensive damage and dangerous hazards. Pay close attention to high-risk areas like connections, plugs, and ground contact points when implementing moisture protection. With routine inspection and maintenance, your extension cords can safely provide power where you need it outside your home. Implement several redundant measures tailored to your specific situation, and always promptly replace damaged cords to keep your outdoor projects running safely and smoothly, rain or shine.

How to Protect Outdoor Extension Cord from Rain

Introduction

Using extension cords outdoors can be very convenient for powering lights, tools, appliances and other electronic devices outside the house. However, exposure to the elements can present certain risks that need to be addressed through proper precautions. Rain in particular can be detrimental to extension cords, leading to dangerous electrical shorts, fires, tool damage, and shock hazards if unprotected.

Implementing solutions to keep extension cords