What Causes Electrical Fires in the Home

Updated on April 15, 2019
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Dan has been a licensed journey-level electrician for some 17 years. He has extensive experience in most areas of the electrical trade.

Home electrical fires are preventable, but they happen all the time. Don't let it happen to you and be particularly careful in the holiday season.
Home electrical fires are preventable, but they happen all the time. Don't let it happen to you and be particularly careful in the holiday season. | Source

Electrical Fire Causes

Unfortunately, home fires are an all-too-common occurrence. In many cases, the root cause is an electrical failure of some kind. Sometimes it is set off by a mechanical failure of an electrical device, and other times, it is due to improper usage or design of the electrical system in your home.

Nearly all electrical fires can be prevented, though, if we understand the causes and take appropriate steps to prevent them.

Poor Electrical Connections Can Cause a Home Fire

Any time electricity flows it creates heat. Under normal conditions, this heat is minimal - your home wiring is designed and installed to prevent any large amount of heat build up in the electrical system. Sometimes, though, failing equipment or devices create far more heat than they are designed to. Some examples might be:

Loose or Worn Outlets

Loose and worn outlets. If cords can be plugged into an outlet very easily or if they simply fall out as time passes, the outlet needs replacement. If appliances plugged into an outlet operate only intermittently it can be caused by poor connections either in the outlet itself (outlets with wires plugged into the back of them instead of being secured by a screw will fail with time) or in wire nuts in the box behind the outlet. Either tighten the wire nut connections and/or again replace the outlet.

Worn Switches

Like outlets, switches will wear out over time. They will usually last for many years, which makes it easy to think they will last forever, but they won't. Just like outlets, the wire connections in the back or side of the switch may be loose and, again like an outlet, the switch needs replacement. It is also possible that wire nuts are loose behind the switch.

Old and Corroded Fixtures

As electrical parts age the wiring degrades very slightly each year. A light fixture may be good for 25 or even 50 years, but eventually the wire insulation inside chars, the connections corrode and the light bulb sockets won't hold a bulb well. If lights flicker or won't stay lit and potential switch problems have been eliminated it may be time to replace old light fixtures.

The spring that holds the wire in the small hole weakens over time and makes for a poor electrical connection.
The spring that holds the wire in the small hole weakens over time and makes for a poor electrical connection. | Source
Changing this flickering light fixture found the old wire to be charred at the ends of the wires with both wire nuts loose.  A fire waiting to happen.
Changing this flickering light fixture found the old wire to be charred at the ends of the wires with both wire nuts loose. A fire waiting to happen. | Source

Other Electrical Problems That Can Result In a Fire

Extension Cord Issues

The use of extension cords should be evaluated for necessity; they are a very common cause of home fires. When a cord is kinked or smashed (if it has been walked on it too many times, for instance), the electrical resistance of the wire inside rises, which creates heat. Eventually, the insulation may well begin to melt but this is not obvious; it may just be a small portion between the copper wires inside. As this happens more and more current begins to flow between the wires and eventually causes a fire. If you absolutely must use an extension cord for long periods of time make sure it is completely out of the way and not subject to physical damage. Under a couch, perhaps, or tucked into the edge of carpeting - whatever it takes to make sure that feet, vacuum cleaners, pets and small children can't reach it. Better to simply add a new outlet to an existing one than use an extension cord for months or years.

Continual Overloads

Many older homes are really marginal in their ability to safely provide enough power to operate all the electrical things we use in modern life. There just isn't enough power available to the home or there aren't enough individual circuits. In years past only one circuit was designed into kitchens, and that isn't enough to properly operate a microwave, refrigerator, toaster, electric grill, mixer, toaster oven, etc. The result is that the circuit breaker or fuse is always tripping. The same is true in bathrooms; the bathroom circuit commonly supplies bedrooms as well, but add in a curling iron and a hair dryer along with the bedroom TV and electric blanket and that circuit is often overloaded as well.

Every time a circuit trips or a fuse blows it is an indication that the circuit is overloaded, but most people will simply reset the breaker and do it again. The inevitable result is that the circuit breaker is slowly damaged to the point it doesn't work properly anymore and the panel itself can be damaged as well. As an electrician, I've seen house panels that have the massive bus bars inside, carrying the entire power for the whole home, half melted from repeated overloads and this is a recipe for disaster - it most certainly is one way that home fires start.

If you are commonly tripping a breaker or having to replace blown fuses, have additional circuits installed as necessary. It can be expensive but it's better than burning the house down.

In addition to electrical overloads is overloading a light fixture with lamps that are too large. According to the NFPA, the largest source of electrical fires are lamps and light fixtures. Such fixtures are designed to withstand only the heat from the rated size light bulbs - do not overload the fixture with bulbs that are too large. While it is quite acceptable to use a 100 watt equivalent CFL bulb to replace a 40 watt incandescent bulb as an energy saving measure in your home, the key is that the CFL is only using a few watts of energy and isn't nearly as hot. It won't overload either the thermal insulation or the electrical wiring of the fixture. It isn't the same as screwing in a 100 watt bulb into a 40 watt light.

Defective Equipment

Occasionally equipment of various kinds can fail in such a way that it may not trip a breaker or blow a fuse, but is still drawing more current than it should. Circuits in general are allowed to carry only 80% of the current the breaker will allow as a safety factor but when that is removed the safety becomes marginal. While the current may not trip a breaker, it does cause heat and, over time, can harm the electrical components such as breakers or the wire itself. Eventually resistance rises to the point that enough heat is produced to cause a fire.

If a fan, for instance, turns too slowly, if the cord warms to the touch, if it makes strange noises - replace or repair it! Don't simply keep using it until the cord catches fire. Electrical heaters are equipped with a "tip over" switch that turns them off if they are tipped over - never, ever defeat such electrical protections. They can be irritating, but they also save lives.

Improper Wiring Methods

A qualified and conscientous electrician will always follow the requirements of the NEC to produce a safe and effective electrical system, but the same isn't true of homeowners who often don't know what is safe. Another example from my experience: I once purchased a used hot tub from a homeowner. Upon finding that I was an electrician, he asked me to unwire it from the house and I agreed to help him out there. He had run wire from the hot tub to a dryer outlet just inside, but what appeared to be adequately sized wire turned out to be 14 gauge wire wrapped with many layers of electrical tape. Now, that is at least 3 sizes too small for the hot tub and when I removed the large cover from the dryer outlet it simply crumbled in my hands - completely charred to nothing but tiny bits of plastic just waiting to be disturbed to fall apart. The homeowner looked at it, looked at me, and commented that "I guess that's what causes fires, huh?".

He was right - that's what burns homes down and it was completely unnecessary. If you don't know what is needed to complete a wiring job safely, either find out or hire someone that does know. Electricians have, in most states, completed years of study and work learning how to ply their craft and are usually quite knowledgeable. Hire one if necessary.

Holiday Decorations

Holidays often bring home fires with them. Extension cords are strung everywhere, lights are added all over rooms and vegetation outdoors, and even candles are left burning without supervision. All of these are dangerous and can cause a home fire at the worst possible time. Make sure that your Christmas tree isn't drying out with lights or candles still on it. Put candles out when you're not right there. Protect extension cords, and particularly don't leave the ends of them in puddles or snow. Arrange cords so that children or pets can't play with them; a dog chewing a cord can not only electrocute themselves but can burn the house down as well. A little common sense can go a long way.

Click thumbnail to view full-size
A damaged extension cord.  Either replace or repair properly - never simply throw some tape on it.  Older homes weren't wired with modern small appliances in mind.  Be cautious about using more than one at a time.This air compressor needs some work where the wire enters the control box; it will eventually be damaged from vibration if not clamped properly.A properly wired shop fixture.  The inset photo shows one without a cable clamp; the wire will eventually be cut by the sharp edge of the fixture.
A damaged extension cord.  Either replace or repair properly - never simply throw some tape on it.
A damaged extension cord. Either replace or repair properly - never simply throw some tape on it. | Source
Older homes weren't wired with modern small appliances in mind.  Be cautious about using more than one at a time.
Older homes weren't wired with modern small appliances in mind. Be cautious about using more than one at a time. | Source
This air compressor needs some work where the wire enters the control box; it will eventually be damaged from vibration if not clamped properly.
This air compressor needs some work where the wire enters the control box; it will eventually be damaged from vibration if not clamped properly. | Source
A properly wired shop fixture.  The inset photo shows one without a cable clamp; the wire will eventually be cut by the sharp edge of the fixture.
A properly wired shop fixture. The inset photo shows one without a cable clamp; the wire will eventually be cut by the sharp edge of the fixture. | Source

The National Electrical Code (NEC) is widely accepted throughout the US as the definitive standard for electrical work. A good portion of that code consists of procedures to prevent fire. I have been a professional electrician for many years and I am expected and required to understand and comply with the guidelines of the NEC at all times. That typically includes an understanding of why those rules are in place.

The NEC's Role in Home Fire Prevention

The NEC, some 800 pages describing proper methods of doing nearly all electrical work, is just a small part of the NFPA - National Fire Protection Association. It is not designed to produce efficient electrical systems nor to make profits for the inspectors enforcing the rules. It is not intended to sell particular electrical devices and it will not describe how to wire a house cheaply or quickly. The only reason for the code is safety - all 800 pages describe how to install electrical systems that will operate safely and this includes fire prevention.

For example, table 310.16 in the 2008 code lists the minimum wire size for a given circuit breaker or fuse - in the table we can see that a 20 amp breaker requires a 12 gauge wire. This isn't because a smaller 14 gauge wire won't work, it is because a 12 gauge wire will carry at least 20 amps of current (with a considerable safety factor) without overheating and causing a fire. If your home is wired with 14 gauge wire (most homes are) but the breaker keeps tripping it is not only illegal but very risky to replace it with a 20 amp breaker. That 14 gauge wire can now overheat before the breaker trips and cause a home fire, and that's the first lesson for the homeowner - never make changes to the electrical system in an effort to bypass the safety devices installed.

GFCI outlets, circuit breakers, fuses, arc-fault breakers - all of these can be irritating at times but they are there for a very good reason - your safety and the safety of anyone in the home. They are designed to shut the circuit off before either a fire or shock can cause any harm and should never be removed, modified or defeated in some manner.

In years past homeowners with screw in fuses rather than modern circuit breakers used to remove the fuse, stick a penny in and screw the fuse back in. Any and all protection afforded by the fuse is completely lost as a result and overloaded circuits will simply heat up until they either melt the wire in two or (more likely) cause a fire. Such modifications all too often have literally deadly results.

The "bible" of electrical work.  Follow it and you will have a good, safe electrical system.
The "bible" of electrical work. Follow it and you will have a good, safe electrical system. | Source

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

Questions & Answers

  • I replaced several outlets in my home several months ago. Everything works as it should. However, I get paranoid about this sort of stuff. How tight of bends am I allowed to have in the 12 gauge wire? I wired them all back they way they were before; I didn't make the wires longer or shorter. I'm just worried that they are bent too tightly and that I should have lengthened the wire. Would an electrical problem have presented itself by now in my home if it was going to? Its been about a year with no issues

    Unless you used pliers or another instrument to smash the wires into the smallest possible bend you need have no worries. Simply pushing them back into the box when installing a new outlet will not make bends too tight.

  • An insurance company is saying that an extension cord that I replaced an end on caused a fire but the cord cap isn't burned, and it still has the paper price sticker on it that looks new, and there was nothing that was plugged in was turned on. The cord is melted about 6 feet away from the cord cap, but that's where the fire was. What should I do?

    You might hire an investigator yourself, and certainly should take lots of pictures. You will need that cord to determine the cause, though, to make sure that it was not damaged at the burned spot before the fire. If it can be done; I am not an investigator.

    It doesn't sound like the insurance company is blaming your work; just the cord. Be aware that that is why extension cords should never be a permanent solution to lack of outlets; they are often damaged and/or overloaded and cause fires. Extension cords are one of the most common causes of fires for just that reason.

  • Is there an odor prior to an electrical fire?

    Sometimes. One might have the odor of ozone if a sparking action is occurring, or insulation or other material might be smoldering. Usually, though, there isn't much to detect.

  • I had a small power transformer that was defective catch fire. Fortunately, no disaster occurred. However, the circuit breaker on that circuit did not trip. Should it have? Do I need to have an electrician look at it to see why it didn’t trip?

    It is possible that there was never enough current draw to trip the breaker, but it would be unlikely. You should either simply replace the breaker (it is an easy and inexpensive task) or have it tested. If you do call an electrician I would suspect that they will simply replace it as breakers are so cheap as to not be cost effective to test. Most breakers cost on the order of $10 and take 10 minutes to replace.

    Should you decide to replace it yourself, I suggest reading the article https://axleaddict.com/rvs/How-to-Install-an-RV-Ou... as it contains instructions on installing a new breaker.

  • Can a switch that’s turned on cause a fire even if it is not being used?

    It would be unusual, but possible as long as the circuit is hot. The small springs inside the switch gradually go bad, causing resistance and that resistance causes heat, which causes a fire. The same for the terminals, particularly the ones on the back that hold the wire with springs rather than by tightening a screw.

© 2012 Dan Harmon


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    • wilderness profile imageAUTHOR

      Dan Harmon 

      2 months ago from Boise, Idaho


      If it was the heater clicking, it was probably just cooling down and the elements and other pieces moving around.

      If it was the socket doing that it would indicate that it was indeed too hot and not a good choice for the heater. Or possibly that the socket is old and no longer makes a firm contact with the plug; if that is the case (the plug is very easy to put in and out of the socket) it should probably be replaced.

    • profile image


      2 months ago

      Hi i had my fan heater pligged into my socket in the wall and it was on full the plug was warm so i unplugged it and when the plig was out of the socket it make a clicking sound like someone was turning it on and off cpuld it be the heater has been to warm for the socket

    • wilderness profile imageAUTHOR

      Dan Harmon 

      19 months ago from Boise, Idaho

      @Maxine I am not a forensic expert, but it seems unlikely that with the transformer gone you will be able to prove anything at all. It sounds more like you are overloading the circuits in your home and of course the faulty extension cord.

      Sorry I can't be of more help. Losing a home is a terrible thing.

    • profile image

      Maxine Rauch 

      19 months ago

      My house just burned and it was a total loss. The fire marshal determined that it was caused by an extension cord that I had a small electric heater plugged into. The extension cord was one of the power surge cords. After the fire my neighbor told me that all of his lights had went out before my fire and the electric company came out and replaced the transformer. One year ago I had a mobile home sitting on the property and it burned, a total loss. Thinking of all this I'm wondering if the transformer could have caused these fires. For sometime I had been having problems with breakers blowing and we would flip them and they would be good and then another would blow. I couldn't believe that with the size of the entrance box a breaker would blow. It didn't seem to be a problem more than having to go to the basement every time to reset the breaker. What should I do about this and how can I find out now if the transformer was the cause of the fires?

    • wilderness profile imageAUTHOR

      Dan Harmon 

      2 years ago from Boise, Idaho

      Hi Vick:

      If you find a power cord that fits the TV it should all be fine. There are only so many styles of cord and, outside of the physical shape they are all the same. If it fits the socket in the TV it will work.

    • profile image


      2 years ago

      Hi there. After buying new tv which turned out to have some issues like blurry and jittery lines around things, most noticale in animation, I decided to out my old tv, 46 " Sony Bravia bought 2011 back up. Long story short, my mom gave my old tv away to someone who actually didn't even use it or set it up and didn't seem to want it, and they gave it back to me. After being in someone else's house of course i worry what it someone pulled on the cord that's attached to it? What if it was damaged, fell and something inside is loose? Also, I can't find the other cords aside to the one attached to the tv the came with the tv. If I buy replacement cords, if they aren't the exact ones that came with the tv yet fit, can this cause a fire? Should I have an electrician or someone who knows a lot about tv's help me set it up? TV set up people from Best Buy wouldn't come set up an old tv. I'm just worried about this. Turns out the older 46" HDTV bought Dec 2011 is clearer than the 49" Sony HDTV (not Bravia - not sure of exact model) bought 2017. I tried placing new tv farther away too - still blurry.

      What should I do to prevent fire? Is there someone in particular I should call to inspect and help make sure replacement cords are correct?

      Sorry this is long.

      - Vick

    • profile image


      2 years ago

      I had water damage from my upstairs bathroom

      Roto Rooter came and then sent a restoration team the put several machines throughout the house and in the kitchen they had atleast 4 machines in the 4th night I smelled something coming from the kitchen and I felt one of my switches it was so hot I couldn’t touch it

      I immediately unplugged everything and after awhile I felt the switch that had already melted and it had cooled down

      I called Roto Rooter and they have not rectified the problem but have bullied me and said lets go to court

      I had never even mentioned court

      The guy has been mean talking over me not letting me finish a sentence and, constantly saying I’d love to go to court the judge won’t believe you I’m a Navy Seal

      I never mentioned court but he kept bringing it up several times its been so stressful and causing me emotionally stress


      I still have not gotten my electrical issue fixed it looks as though I will have to go to court!!

      They have been a nightmare to deal with they were called February 27 and this is now April 13,2018 and nothing has been done BEEARE I would hate for anyone to have to go through something like this ....

    • wilderness profile imageAUTHOR

      Dan Harmon 

      2 years ago from Boise, Idaho

      Hi Melissa:

      I'm sorry, but this is not something that could be troubleshot long distance. Your first thought - to call an electrician - is the correct action to take. I wish I could help more.

    • profile image


      2 years ago

      Please, maybe you can tell me what is going on.

      A few days the front part of the house, living room, dining room, front bedroom, hall, bathroom, lights weren't on or the tv in the living room. I do not make it a habit to reset breakers, but one or two times I thought it ok. So I reset it. This morning it was the kitchen and the back bedroom that wouldn't work. I did not check wall sockets, just lights. So I called an electrician. He said to reset it once and call him if it happened again. I left it off for the day because I was busy. I was in the garage this afternoon and the 2 overhead lights were fine. Went out about 2 hours later they were off, all overhead lights in the house, the refrigerator was off, the wall socket in the living room and one in the kitchen worked. When I checked the fuse box even with a huge part of the house affected there were no more fuses tripped, still just the one. How can that be? How can the same fuse which tripped for 2 rooms now have added most of the house to it please?

    • wilderness profile imageAUTHOR

      Dan Harmon 

      2 years ago from Boise, Idaho

      Hi Spenny:

      Personally, I would get rid of it. Toasters are not expensive, certainly not enough to risk losing a house or life over, and at 14 years old you've certainly gotten your moneys worth.

      If you choose to keep it, though, I would certainly unplug it when not in use. At least that way you know you will be around, and not asleep in bed, should there be a problem.

    • profile image


      2 years ago

      I have a toaster oven, which is plugged into a surge protector extension cord, that makes a weird noise from time to time. The toaster oven may not be used for days and then, all of a sudden, we will hear this piercing, ringing noise coming from it. It has been doing this since we got it 14 years ago. I have to turn the oven on, then off again to make the noise stop. What are you thoughts about this toaster? Is leaving it unplugged okay until we use it each time? Should we just get rid of it?

    • wilderness profile imageAUTHOR

      Dan Harmon 

      2 years ago from Boise, Idaho

      Hi, Courtney:

      I'm not familiar with gas stoves at all (never had one) but have seen the electric igniters used. And yes, a short could definitely start a fire. It does seem like the gas would have to be on, but as I said I'm not familiar with the ins and outs of a gas range.

      A short, though, can very slowly develop as insulation is degraded. Eventually there is a trickle of current, which heats and further degrades the insulation. As more time passes that trickle becomes enough to make a spark or to activate something else and presto: a fire begins.

      Or, as happens in an outlet, the connection is poor, giving rise to heat. Heat which again degrades the metal, insulation and plastic of the outlet until it becomes a real problem

    • profile image


      2 years ago

      Hi there- a few weeks ago, I was sitting in the living room with my kids and heard a ticking sound coming from the kitchen. I went in there and it was the gas stove which was not on, and had not been in use all day. It was making the clicking sound a gas stove makes when you turn the knob on, before a flame ignites. My husband took a look and slowly turned one of the knobs to see if perhaps it mysteriously was partially turned on, the ticking stopped, but within seconds, a loud popping sound was coming from beneath the knobs and you could see red lights beneath the knobs as well. From there, flames came up from the knobs and we had to pull out the fire extinguisher to stop the fire. The appliance company is saying that over time, something like this could happen, and the repair person said that at first glance, it looks like a wire fastener needs to be replaced. I just find it hard to believe that out of the blue, it would start fire. Thank goodness we were home and awake to realize what was happening! Could an electrical short be the reason this happened, and is it feasible for a short to occur when an appliance isn’t in use?

    • wilderness profile imageAUTHOR

      Dan Harmon 

      2 years ago from Boise, Idaho

      Hi, Nervous

      Sounds like your outlet has a problem. I would replace it as soon as possible. And yes, if the outlet is faulty it could start a fire, even without having something plugged in - get this done quickly, and consider turning that circuit off at the breaker until it is repaired.

      If a new outlet doesn't solve the problem then there is something wrong with the vacuum.

    • profile image


      2 years ago

      I plugged my vacuum cleaner in to the living room socket and saw fire coming from the socket. I unplugged the vacuum and it immediately stopped. The vacuum cord hasn't been working properly, is it the electrical socket, or vacuum cord. what do I do now? The fire stopped, but will it restart.

    • profile image

      sarina rae 

      2 years ago

      oh gosh now i'm worried. i'm renting a house that was designed by a landlord with no experience, the sockets are loose when you plug something in the whole socket will move as if its now even properly in the wall, and things don't plug in snugly, the wires are visible around the sockets, our breakers switch off every 3 months. Right now there are 3 that are still off from overcharge, so we've been using extension cords for 3 rooms and 2 bathrooms that everybody steps on and are jammed under closed doors.. House was probably built back in the 80s by an extremely cheap landlord (there's no insulation in the walls, even, just wires that hang and loosely inside of two thin pieces of wood and spiderwebs everywhere inside). I also wonder if having carpenter ants can damage wires and such, we had thousands of them 2 years ago, seasonal for 3 years.

      I know nothing about this stuff but thought to look it up, there was a housefire across the street from us from an old furnace, and our furnace was leaking gas last year (was replaced, after a year plus of leaking gas) so i don't trust our landlord to begin with..

    • profile image

      Frank Eggers 

      2 years ago

      My house was finished in 2009. Of course it has arc breakers, but I chose to replace 2 of them with standard circuit breakers. One supplied power to both the master bedroom and the security system. Knowing that arc breakers are temperamental, I replaced that one with a standard circuit breaker to ensure that the security system would continue to work. The other arc breaker provided power to a concrete shed in the back yard; in it is the irrigation system control. I also replaced that arc breaker with a standard circuit breaker.

      I understand why arc breakers exist, but there tendency to trip occasionally for no valid reason should be considered.

    • wilderness profile imageAUTHOR

      Dan Harmon 

      3 years ago from Boise, Idaho

      Only two suggestions, neither of which is likely. First, some motors will trip a GFCI - that's why a garage freezer or refrigerator sometimes has a non-GFCI outlet. Second, it may be overloading the circuit and blowing the breaker. You might try it somewhere else - living room, maybe - and see what happens.

    • profile image


      3 years ago

      I just plug in my new foodsaver to Gfci outlet and it trip. On that wall there is two outlets that they share line. They made noise trip and of course I did unplug foodsaver but now the second outlet is not working (would not recet) not the one that small appliance was in use. I thought that food saver was defective and I went back to the store got new one and same thing happened. Now when I check that outlet with other appliances it's working fine. Why this is happening? Any suggestions?

    • wilderness profile imageAUTHOR

      Dan Harmon 

      3 years ago from Boise, Idaho

      While AFCI's do help prevent home fires, they are also prone to nuisance tripping and not all devices are truly compatible with these breakers. Some vacuum cleaners, for instance, will often trip an AFCI.

    • profile image


      3 years ago

      Dear Dan harmon. Can you comment on AFCIs. The advanced synchronising system still not preventing fires. The breaker trips by precise set of algorithms, which means it is prone to any slight risk, which is quite different from old circuit breakers.

    • wilderness profile imageAUTHOR

      Dan Harmon 

      3 years ago from Boise, Idaho

      Sounds very much like either a loose connection somewhere (although not going off denies that) or more likely the switch needs replaced. Does the switch "feel" different when flicked? Is there a sparking sound? Is it warm? All tests that might help determine if it is bad.

      If this is the case, switches are easy to replace and can be done by anyone. Here is a link to a tutorial on changing a light switch:


      Good luck!

    • profile image


      3 years ago

      We have a light switch in our kitchen that has two switches. One for the kitchen and the other for the dining room. The switch for the kitchen tends to flick and just not turn on or go off. No outlets attached, but both lighting fixtures are ceiling fan with attached lights or just a chandelier with bulbs in the other. Any guesses before we contact an electrician to explain the possible issue/problem or what we ourselves should check? Thank you in advance for your generous assistance.

    • wilderness profile imageAUTHOR

      Dan Harmon 

      3 years ago from Boise, Idaho

      Absolutely it can, Shelia. Outlets wear out and a major culprit is the little springs that hold a plug into them. When that happens the electrical resistance rises, the outlet gets hot and a fire can result.

    • profile image


      3 years ago

      Loose outlets. Can it cause a fire. Lights flickering on and off. Appliances going on and off?

    • wilderness profile imageAUTHOR

      Dan Harmon 

      6 years ago from Boise, Idaho

      Highly unlikely that a hot ceiling (attic) could make electrical wires overheat. At most, it will be a contributing factor, but most wiring today is rated for 90 degrees C, or 194 degrees F - that's nearly boiling temperatures. The circuit would have to already be overloaded or in some way defective for attic temperatures to fry it.

    • profile image


      6 years ago

      Can a very, very hot ceiling fry or make

      electrical wiring sitting there to overheat?


    • vibesites profile image


      7 years ago from United States

      Voted up and useful. This would be a life-saver! Thanks for sharing. :)

    • iguidenetwork profile image


      7 years ago from Austin, TX

      Very informative and helpful hub. Voted up and useful. Thanks, wilderness! :)

    • wilderness profile imageAUTHOR

      Dan Harmon 

      7 years ago from Boise, Idaho

      Without going into great detail, a ground system in a house does two things: it provides a path for energy to reach the earth (or the generating station) without going through your body and it provides a path for partial short circuits to enable tripping a breaker rather than building to point something gets so hot it catches fire.

      If your antennae was actually struck by lightning, the ground system provided a path for that current to reach the earth without going through all the wires and electrical appliances in your house; a very good thing indeed as those wires cannot carry the current of a lightning bolt without overheating very badly. Your new ground wire could be why you still have a home.

    • alahiker28 profile image

      Vicki Carroll 

      7 years ago from Greater Birmingham Area

      Good hub. Voted up. I wonder what the importance of a ground wire is. I was recently told my home didn't have one, so I had one installed. A week later I'm quite sure my antennae was struck by lightning, but no fire. Was it my ground wire that saved me?

    • wilderness profile imageAUTHOR

      Dan Harmon 

      7 years ago from Boise, Idaho

      I felt the same way on a visit to Mexico - dozens or hundreds of wires ran up the power poles and clipped to transmission lines. No protection at all, and often dangling within reach of pedestrians.

      We may complain at the cost of some safety regulations and materials, but it sure pays in the long run. What third world countries do with their electricity hookups is truly scary.

    • Will Apse profile image

      Will Apse 

      7 years ago

      I routinely freak out at the electrical set ups in Thailand. I rewired a few light switches and found that the only thing stopping a live wire touching the metal face plate was insulation tape (old, glue failing).

      240v cables are joined with simple connector blocks and just left open. Paint one and you could fry.

      Showers are rarely earthed because it costs money.

      And when you say re-setting the breaker over and over again is a bad habit... Well, at least you have breakers and micro switches.

      Still, who wants to die of old age.

    • wilderness profile imageAUTHOR

      Dan Harmon 

      7 years ago from Boise, Idaho

      @denisemai; those can lights may be nothing to worry about; many simply push up into the framework and can work loose over time, allowing them to drop from the ceiling to the point that the wire is all that is holding them. Simply push them back up into the ceiling.

      @Just ask susan: Good choice - I've seen many older homes still using the old knob and tube wiring with no problems (outside of the fact there is no ground), but have always been afraid of it.

    • weestro profile image

      Pete Fanning 

      7 years ago from Virginia

      Great hub, thanks for the tips!

    • Just Ask Susan profile image

      Susan Zutautas 

      7 years ago from Ontario, Canada

      When we bought our home it had all the old knob and tube wiring. In order to get home owners insurance all had to be replaced so out it all came. We also added a 200 amp service.

    • denisemai profile image

      Denise Mai 

      7 years ago from Idaho

      The outlets that are loose or falling down is of concern to me. I live in a fairly new house but some of my canned lights are hanging below the frame. I'm wondering if the electrician did a shoddy job. I'll have my husband look at it. Good article and very timely with the approaching holidays.

    • chrissieklinger profile image


      7 years ago from Pennsylvania

      Friends of ours had a house fire due to a dehumidifier malfunctioning and luckily they were not home at the time. Many people don't realize all the things you have plugged in when you are not home. Thanks for writing this easy to read but very informative article!

    • wilderness profile imageAUTHOR

      Dan Harmon 

      8 years ago from Boise, Idaho

      @Gus; you are absolutely right, and the poor connections that are the result of that oxide are an electrical fire hazard as well.

      Good catch!

    • GusTheRedneck profile image

      Gustave Kilthau 

      8 years ago from USA

      Hi Wilderness - One of the things that folks have to look out for is aluminum wiring. Most of that is probably already replaced or burned out, but the connections degrade due to the forming of aluminum oxide at joins.

      Thanks for the useful article.

      Gus :-)))

    • Austinstar profile image


      8 years ago from Somewhere near the heart of Texas

      I did not know you were one of those magical electrical guys.

      Great informative hub. Loved the photos too.

      Is it hard to wire an out building, like a storage shed to a home? I want a storage shed for use as a spa room. Of course I'll have to wire it. Or rather pay some magical electrical person to do it.

    • GoodLady profile image

      Penelope Hart 

      8 years ago from Rome, Italy

      I live with a great electrician so he saves me from myself, but without him I'd certainly need to print this up and keep it as my guide. It is so well put together and so very helpful, explaining the whys and wherefores of electricals.

      Voting up

    • angela_michelle profile image

      Angela Michelle Schultz 

      8 years ago from United States

      This was very informative and information I did not know before. Great job!

    • LauraGSpeaks profile image


      8 years ago from Raleigh, NC

      Very informative! Voted up.

    • ThePracticalMommy profile image


      8 years ago from United States

      This hub is incredibly useful, especially for a homeowner of an older home, like myself. I know there is much electrical work needed in this home done by an experienced electrician. I have fears that the previous homeowner did much of the electrical work himself without knowing how to do things properly and someday there may be a fire due to that. Time to call an electrician!

      Thanks for the info! Voted up and useful.

    • theraggededge profile image

      Bev G 

      8 years ago from Wales, UK

      Invaluable information that everyone should read!

      Here in the UK, we have a contract with our energy providers to inspect and repair our electrical and heating systems. It's an added cost but one we are happy to pay.

    • SimeyC profile image

      Simon Cook 

      8 years ago from NJ, USA

      Very informative and well written - hmmm I better call the wife I have one switch that needs replacing I think!


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