Is It Safe To Connect Wires With Electrical Tape? | What Blueprint (2022)

Is It Safe To Connect Wires With Electrical Tape? | What Blueprint (1)

When making any electrical connection, it is very important to do it safely and properly. Even household electric current can be dangerous and fatal if connections from supply to appliance or device are not correctly done.

Connecting wires using electrical tape is not recommended for several reasons. While this may be common practice in many homes looking for a quick DIY solution, there are better ways to securely and safely connect wires to ensure proper connecting and reduce any risk of shorting or exposure.

Using the right tool for the right job is always a good way to do things, especially when it comes to electricity. Let’s look at safer and more effective methods of connecting electrical wires and the right use for electrical tape.

What Is Electrical Tape Used For?

Electrical tape or insulation tape, as it is also known, is used for exactly that purpose- insulation. It’s made from a non-conductive vinyl, fiberglass, or plastic cloth; electrical tape is a pressure-sensitive tape designed to insulate electrical wiring.

Covering live wires with electrical tape protects from possible electrocution if someone comes into contact with them. It prevents current from traveling from one wire to another, preventing a short circuit or electrical fire.

As an electrical accessory, it is not designed to connect electrical wires but to INSULATE them after they have been properly and safely connected as need be.

The safest use of electrical tape is to cover minor cracks, cuts, and abrasions on electrical wires where the core insulation is still intact. Where the wire is exposed and that outer jacket is compromised, using electrical tape to cover it is not safe or recommended.

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That wire should be replaced and not repaired. While these types of quick fixes using electrical tape to cover those exposed wires are common, they would not pass safety certification from a regulatory perspective.

Why You Shouldn’t Use Electrical Tape To Connect Wires

Before we condemn electrical tape, we should point out that for lower voltage, smaller wires, twisting them together and using the tape to insulate them is fine. This is because hobby wires and other low voltage and low-current wires pose little or no risk of electrocution or fire.

With any DIY job, the saying goes,’ Use the right tool for the right job,’ and in this case, using electrical tape to connect wires is not following this sage advice.

Electrical tape has an adhesive designed to stick to the plastic casing of the wires and itself. So when you insulate electrical wires, the tape adhesive is sticky. Over time, this adhesive will dry out due to air exposure, heat from the connection, and moving around.

So the insulation around the wires can move or shift, exposing live wires to the open air and people, kids, pets, and materials that could catch fire under the right conditions.

Many people twist the wires together and then apply insulation tape over them to seal and protect them. Under normal circumstances and for smaller wires, this can be a temporary solution.

Even though the typical PVC / PTFE has low conductivity, it could still lead to a short and electrocution or fire with the right amount of heat and current.

For larger wires, a more secure and electrically sound connection method is recommended.

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Why Twisting Wires As A Splicing Method Isn’t Recommended

While we are focusing on using electrical tape to connect wires, this is only one side of this discussion. The way the wires are connected also has an impact on the safety of that connection.

Wire splicing or the action of connecting wires together is also something that needs to be looked at in this conversation. The common way to connect electrical wires is to take the two exposed ends, twist them together and then insulate them.

While this is easy and convenient, there are some weaknesses with this type of connection.

Even having the wires twisted solidly has some inherent faults. Firstly, twisting the wires puts strain and stress on the individual strands of the cable. Often after doing this, you may find one more small coppe strand has detached.

Over time, more and more of these may come loose, compromising the integrity at the point of current transfer, and this can lead to resistance in the wire, creating an unsafe connection and even getting hot enough to melt the tape.

Secondly, this splicing method is not securely connected; for example, if the wires were soldered together and then insulated with electrical tape, that connection is far less likely to produce disconnected strands.

Also, any sudden force applied to the spliced connection can easily cause the wires to be ripped apart, removing the insulating tape and exposing live current and uninsulated wires to the environment.

Where animals, kids, or potentially combustible materials are in the vicinity, this is a recipe for disaster. A live exposed wire on a carpet or near other electrical cables is very, very unsafe.

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Is It Safe To Connect Wires With Electrical Tape? | What Blueprint (2)

Three Ways To Connect Electrical Wires Safely

Electrical tape has a place and very valuable use in electrical work, but better and safer ways to connect wires. The methods below are for connecting mains wires, i.e., 110V AC from the wall.

1.Wire Nuts or Wire Lugs

These are highly durable and well-insulated plastic cones that connect the wires inside them using a spring. When the wires are inserted together, they make contact inside the nut, and the spring connects them as the nut is twisted.

Using wire nuts is fairly straightforward and makes connecting wires easy and safe. Taking the two wires, you want to connect, strip off about half to three-quarters of an inch of insulation from each and lay them together.

Push the wires into the nut and turn the nut clockwise to engage the spring inside using the appropriate size nut. Once you’ve twisted the nut and secured the wires, give them a gentle pull to see if they are secure.

If you don’t them coming loose or see wire strands come out, then you are good to go. If they are loose and come out, then you’ll have to do it again.


Soldering wires together is one of the safest and strongest ways to connect electrical cables. It provides a very strong joint and is less likely to detach under force than other methods.

The solder is also highly conductive, so electrical current passes from wire to wire with little or no resistance.

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After stripping off the insulation to about half an inch or so, lay the wires facing each other, so they form a straight connection. Unlike the wire nuts, soldering can be done straight to continue the natural wire flow.

Using the soldering iron, drop a few small bits of melted solder onto the wires to make the initial join and then completely apply the solder to the rest of the wire until the wire is covered with the solder.

3.Strip Connectors

This is another good method for connecting electrical wires that makes them safe and mostly unreachable, especially with little fingers.

These are made from durable plastic and work by connecting the wires in a steel ‘tunnel’ with locking screws that clamp the wires down to the steel connector.

Using these is especially popular for connecting wires on trailers as well as for electrical mains. You can get strip connectors in a wide variety of diameters to suit any cable thickness, but as with any electrical connector, check the voltage and current ratings before doing your connection.

Once done, you can add the electrical tape over it to provide some extra insulation and protection. If this connection is outdoors, make sure that the connection is well protected against rain or moisture.


The use of electrical tape to connect wires should never be a permanent solution, and one that should be used as an immediate and temporary fix until a proper and safer connection can be made. Electrical tape and its various types work very well as an insulator, but it should be used as intended – as insulation material and NOT as a connector!



Can I just use electrical tape to connect wires? ›

What you need: a roll of electrical tape and two wires whose ends have been twisted together. First, lay the twisted part of the wires onto a strip of electrical tape. Wrap the tape around the wires tightly 5-6 times, making sure to cover up all the wire. Give your connection a tug to make sure it is strong.

Is it safe to wrap wires in electrical tape? ›

Electrical tape is the simplest method of making electric wires safe. You also use tape on capped live electric wires as an extra precaution. Tapes can be used on loose live wires that do not fit the cap. You can simply use tape over the live wire to fit into the cap.

When should you not use electrical tape? ›

Electrical tape is intended for minor damage to the cord. It should not be used on damaged parts where bare wires are exposed. Wherever the tape is used, it should not be covered by something that traps heat, like a rug, or under any other flammable material.

Is it safe to tape wires to the wall? ›

The aggressive adhesive of duct tape can not only leave residue behind, but can pull up paint, wallpaper, and finishes on floors and walls, causing significant and costly damage.

Does electrical tape prevent shock? ›

It stops the electrical current from accidentally passing to other wires, which could create a short or even start an electrical fire. Additionally, it prevents possible electrocution if the live wires are touched.

Can you wrap two wires with electrical tape? ›

Connecting wires using electrical tape is not recommended for several reasons. While this may be common practice in many homes looking for a quick DIY solution, there are better ways to securely and safely connect wires to ensure proper connecting and reduce any risk of shorting or exposure.

How do you cover exposed wires with electrical tape? ›

Stick electrical tape over the exposed wire and wrap it around once. Peel up the end of the tape from a roll of electrical tape and center it over the area of the cable with the exposed wire. Press it down on top of the exposed section and wrap it tightly around the damaged area 1 full revolution.

Does electrical tape conduct heat? ›

Things to Know Before Investing in Electrical Tape

Electrical tapes are made with a PVC backing and rubber-based adhesive. They offer exceptional heat resistance – enduring temperatures upwards of 200° F.

Can exposed wires cause a fire? ›

As many of us know, exposed wire creates a fire hazard. An aging system with worn-out insulation that leaves wires exposed is vulnerable to power surges, overheating, shorting out and encountering other elements in the wall that can cause a fire.

How hot can electrical tape get before it melts? ›

Electrical tape is more likely to melt than to catch fire. For regular applications, the odds of electrical tape melting are somewhat slim. The most common Electrical tape made of Vinyl will melt at a minimal temperature of 500 degrees Celsius (°C) or 932 degrees Fahrenheit (°F).

How do you cover exposed wires without electrical tape? ›

4 Ways to Insulate Wires Without Electrical Tape
  1. Heat- Shrink Tubing. Heat shrink tubing, also known as heat shrink, is a shrinkable tube that shrinks when exposed to heat. ...
  2. Wire Nuts. They are also known as wire connectors or wire caps. ...
  3. Friction Tapes. ...
  4. Duct tape.

How do you seal electrical wires? ›

How to Waterproof Electrical Connections - 3 Ways - YouTube

What tape is good for wires? ›

Vinyl. Vinyl electrical tape is the most common type of electrical tape for use in the home. It has an abrasion-resistant PVC backing that is long lasting and flexible, making it ideal for insulating the wires and electrical connections during electrical tapping.

Can you cover electrical wires with duct tape? ›

Although it may technically offer slightly more protection against exposed wires than no covering at all, duct tape is NOT an electrically insulating material and is entirely unsuitable for proper protection against live current.

How do you cut a live wire without getting shocked? ›

  1. Look to see if there is any conductive substance near the wire or wires that need to be cut. ...
  2. Cut only one wire at a time. ...
  3. Wrap the open ends of the cut live wire with electrical tape to ensure you do not accidentally electrocute yourself.

Do electricians use electrical tape? ›

"The primary tapes used in electrical applications are vinyl, rubber, mastic, and varnished cambric." Electricians generally use only black tape for insulation purposes. The other colors are used to indicate the voltage level and phase of the wire (colored tape sometimes is called "phasing tape").

How do I connect two electrical wires? ›

How To Connect Electrical Wires Together (Tutorial) - YouTube

How do you join wires together? ›

Never Solder Again - How to Connect Wires the EASY Way - YouTube

How do you connect two wires without soldering? ›

Join wires reliably with NO solder - YouTube

How do you know if a wire is live? ›

One of the easiest ways to know if a wire is live is to use a voltage checker or a current checker. These are simple devices that you can touch to any wire, and it will tell you if there is electricity running through it.

Does electrical tape leave residue? ›

Electrical tape leaves behind a sticky residue. Black tape, or electrical tape, is used on electrical cords and other devices. Left long enough, the tape can leave a sticky residue on your electronics and other items.

Where can you use electrical tape? ›

Electrical tape is most commonly used in DIY applications for making repairs and joins to smaller wires. As we'll outline in more detail below, it should not be used for major repairs to very badly damaged wires, or on its own for creating permanent connections in junction boxes, light switches, or wiring outlets.

What tape can withstand heat? ›

Fiberglass tapes, basalt tapes, and aluminum foil tapes are commonly used in high temperature gasketing, sealing, lagging, thermal insulation, and encapsulation applications around furnaces, ovens, and hot pipes.

Where do most house fires start? ›

Where are home fires most likely to start? Home fires are more likely to start in the kitchen than any other room in the home. The second leading cause of home fires are heating sources like wood stoves, and fireplaces. Fires caused by smoking are the leading cause of deaths.

How do electrical fires start in walls? ›

Fires start in electrical panels from overloaded circuits or age of the panel. The panel and circuits become overloaded when the distribution of electricity is inadequate. Occasionally, lighting equipment acts as a source of heat that is too close to easily combustible materials.

How do most electrical fires start? ›

Most electrical fires are caused by faulty electrical outlets and old, outdated appliances. Other fires are started by faults in appliance cords, receptacles and switches.

Can tape catch fire? ›

Well, despite them both having that plastic-like texture, they are not considered to be flammable at all. They can, however, melt. Electrical tape was created specifically to be used with all types of electrical wires, and other components that may be prone to sparking at some point.

How much heat can electrical wires take? ›

The CDA research has shown that temperatures of open wires in attics can get perilously close to the 194°F limit. If the wires are buried in attic insulation, pass over light fixtures or, worst of all, are arranged in tight bundles, they get even hotter than if they're out in the open air.

What is black electrical tape used for? ›

Electrical tape is a popular cable management solution, used to insulate wires that conduct electricity. It comes in a variety of colours, but the reason has nothing to do with aesthetics. Each colour has a purpose. Black is generally used as an insulating electrical wire.

Can I use Gorilla tape as electrical tape? ›

Gorilla Tape should NOT be used as an electrical tape.

Can you leave old wires in wall? ›

It's acceptable to leave wire in the walls. The only thing you need to do is leave the ends exposed in boxes and wire nut and tape the to legs together. That will indicate to an electrician what's going on, and if someone does try to tie into them in the future it will just pop the breaker.

Does masking tape conduct electricity? ›

These tapes are nonconductive and are a great choice for temporary repairs, but they do not have the same insulating properties as duct tape. Therefore, you should use caution when applying electrical tape to wires. If the tape comes off, you will need to remove it before applying any other type of tape.

What happens if you accidentally cut an electrical wire? ›

Precaution: Identify the circuit, turn it OFF and Tag it with a Note before working with the wiring. Important: Burnt or damaged wiring and circuit components should be replaced with new electrical materials of the same voltage and amperage rating.

Is it safe to cut a live wire? ›

There are many obvious dangers and hazards working with live cables. Cutting a live electrical cable can lead to serious injury and in some cases death.

Is spray foam safe around wires? ›

While there may be debate between individual contractors about spraying foam insulation over electrical wires, industry guidelines state that spray foam insulation can be applied directly over electrical wiring.

What do the colors of electrical tape mean? ›

Green: In the US, green tape means “earth ground.” It's common for green and yellow tape to be used together to imply “isolated ground.” Brown: Brown tape signifies “high voltage, phase A.” Yellow: Yellow symbolizes “high voltage, phase C.” Red: Typically, red tape means “low voltage, phase B.”

How do I choose electrical tape? ›

Look for an electrical tape that is hand-tearable and easy to wrap around wires. It should stick quickly and unwind easily from the roll without twisting or curling during application to avoid frustration on the job.

Which is better duct tape or electrical tape? ›

Duct Tape, though strong at first, can degrade pretty quickly, especially if it's exposed to water or heat. Electrical tape, on the other hand, is incredibly durable and can withstand both water and heat (though it is not considered waterproof).

What's the difference between electrical tape and duct tape? ›

Both duct tape and electrical tape have a strong adhesive that will stick to almost every surface. However, duct tape adhesive is much stronger, made of rubber, and can pull out hair or tear the skin. Electrical tape adhesive is also rubber-based, but it's not as thick.

Is it safe to put tape over an extension cord? ›

Recommendation against taping

Applying electrical tape that is too thick or applying too much of it could change the cord's original flexibility and lead to internal damage.

How do you cut electrical wires safely? ›

Use a utility knife to rip round cable. Carefully follow the wire's contours to avoid cutting or nicking the wires inside. When ripping either kind of cable with a utility knife, always work on a flat horizontal or vertical surface and cut away from your body, never toward it.

Will I get electrocuted if I cut a cable wire? ›

A: Cable and phone wires don't carry current, so it's safe to remove them. However, it's critical not to cut into a power line, as you know. The first step is to be sure you know the difference.

How do you check if wires are live with a multimeter? ›

How to Identify Hot, Neutral and Ground Wires using ... - YouTube

Can I use electrical tape instead of wire caps? ›

Never use tape in place of wire nuts—it's simply not secure enough, and it's vulnerable to damage. Some people like to use wire nuts and wrap them with tape. This fine to do, but you probably won't find any wire nut manufacturers advising you to do it.

Can you use electrical tape instead of soldering? ›

You are also confusing means of making a connection with the means of holding that connection in place. Solder does both these things. Electrical tape only does the latter. Therefore, no, electrical tape is not a substitute for soldering.

How do you connect wires without connectors? ›

Join wires reliably with NO solder - YouTube

Can you tape ground wires together? ›

Your ground wire is almost always green or bare copper. You can label this with a small piece of electrical tape by writing a “Ground” or “G” on it and wrapping it around the wire.

Can exposed wires cause a fire? ›

As many of us know, exposed wire creates a fire hazard. An aging system with worn-out insulation that leaves wires exposed is vulnerable to power surges, overheating, shorting out and encountering other elements in the wall that can cause a fire.

How do you seal electrical wires? ›

How to Waterproof Electrical Connections - 3 Ways - YouTube

Should you put electrical tape around outlets? ›

Answer: No. Although the application of electrical tape to conductive parts, as described above, will likely reduce worker exposure to the shock hazards of uncovered receptacles, it is not an acceptable alternative to retaining receptacle covers in place or turning off power.

What can I use if I dont have soldering wire? ›

The alternatives to soldering electronics are heatless soldering, the twisting fold-over with shrink wrap tubing method, and the soldering with rosin method. While two of the methods still require heat, I found them to be a lot easier for me compared to using old-fashioned soldering wire.

What can I use if I don't have soldering wire? ›

You can get lead-free using rosin, exactly same as leaded solder.

How do you connect two wires together? ›

Never Solder Again - How to Connect Wires the EASY Way - YouTube

What is the best way to join electrical wires? ›

Twisting the wires together and soldering is often the best method, but there are two ways of doing this. If possible, you should twist the wires in-line before soldering as this makes a stronger (and neater) join than twisting the ends together.

Can you use super glue on electrical wires? ›

super glue (cyanoacrylate glue) is a good insulator. i have heard of people using it to provide extra hold on wire wrap boards. its not doing the job of solder though, its not providing the electrical connection but rather just keeping it from coming unwrapped. Plastic tape is an insulator.

Can I use superglue instead of solder? ›

There is no good substitute for soldering. No glue made will conduct electricity or hold as well as solder.

Can you connect all ground wires together? ›

YES, all the bare grounds go together!!

Can I connect two ground wires together? ›

No you can't.

How do you cover exposed wires without electrical tape? ›

4 Ways to Insulate Wires Without Electrical Tape
  1. Heat- Shrink Tubing. Heat shrink tubing, also known as heat shrink, is a shrinkable tube that shrinks when exposed to heat. ...
  2. Wire Nuts. They are also known as wire connectors or wire caps. ...
  3. Friction Tapes. ...
  4. Duct tape.


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