Why is daisy chaining extension cords dangerous. That’s why it’s considered un-safe.
Why is daisy chaining extension cords dangerous Most people, however, will NOT know how to calculate ampacity, voltage usage, etc. Overloaded circuits pose safety hazards. It’s not hard to estimate the maximum safe load We would like to show you a description here but the site won’t allow us. If any part of the extension cord is “hot” while in use, this may be an indication that the cord is being overloaded and powering equipment beyond its rated capacity. It significantly increases the risk of overloading the circuit and causing a fire. Is it really dangerous to daisy chain maximum of 2 extension cords? Nov 5, 2024 · The Pitfalls of Daisy-Chaining Power Strips "Daisy-chaining" is when multiple power strips or extension cords are connected to one another. Why can’t you plug an extension cord into another? Are these small gauge wire, non grounded types or things like grounded plug strips? If they use #12 AWG type grounded cords they will be OK. Imagine a chain where each link is an extension cord, all plugged together to bring electricity to a distant point. “It increases the risk of overload and fire,” he says. . Instead, it’s advisable to use a single extension cord that meets the length requirements for the task at hand. Overloading can occur when multiple devices are plugged into one cord or when cords are “daisy chained” (plugging multiple extension cords together). This is called “daisy-chaining” and can overload the circuit creating a potential fire hazard. May 17, 2025 · Avoid daisy-chaining multiple power strips or extension cords to reduce electrical failure risk. We’ll discuss the risks associated with connecting multiple extension cords together, known as daisy-chaining, and why this practice can lead to dangerous situations. Jul 29, 2023 · Do you know the risks associated with using extension cords? Find out in this handy guide – including tips for avoiding the 8 deadliest extension cord mistakes. Aug 3, 2025 · Can you connect multiple extension cords together? While it might seem like a simple solution to reach distant outlets, connecting multiple extension cords together, often referred to as daisy-chaining extension cords, is generally not recommended and can pose significant fire and electrical hazards. Be aware of the following dangerous or improper conditions: Daisy-Chaining This refers to interconnecting multiple power strips and/or extension cords. One electric fire, or a kettle would pull much more current than this lot combined. Extension cords or surge protected power strips are often interconnected, or “daisy chained,” to readily provide more outlets and/or to reach greater distances. Oct 5, 2020 · Daisy chaining extension cords together can cause internal heating of cords, damage the insulation, and could damage the integrity of the cord. The way I've heard (and read) it is that chaining two extension cords together increases the total resistance of the circuit and leads to greater heating. This practice is particularly dangerous because it increases the load on the first cord in the chain, which may not be able to handle the combined power requirements of all the connected devices, leading to overloading. By understanding the risks and taking appropriate precautions, you can protect your home and business from electrical hazards. Jun 25, 2023 · Daisy chaining power strips can be dangerous and increase the risk of overloading the circuit. It seems daisy chaining extension cords is generally not recommended. While daisy chaining might seem convenient, it can lead to several issues, such as overloading circuits or increased resistance due to longer wire lengths. This can easily lead to an overload of both the cords and the circuit, increasing the risk of electrical fires. Daisy Chaining Daisy chains and mixed daisy chains constitute some of the most common violations identified during Naval Occupational Safety and Health (NAVOSH) inspections. Feb 21, 2025 · Avoid daisy-chaining extension cords Even though too-long cords are a no-no, if you do need to bring power to far-flung places, avoid daisy-chaining multiple cords together. In this article, we’ll uncover the most common mistakes people make with extension cords Multiple extension cords or power boards plugged together Plugging multiple extension leads together (also known as daisy chaining) or plugging power boards into extension leads can be very unsafe. First off, daisy chaining surge protectors is a violation of OSHA regulations and the National Electric Code. This practice, known as "daisy chaining," can cause the circuit and cords to overheat. A floor covered in cable spaghetti isn’t just ugly; this kind of daisy chains set-up is a serious fire hazard. Remember to observe other extension cord safety tips as well. Electrical Safety First is concerned that many may be putting Apr 29, 2025 · However, daisy-chaining a surge protector can make it less effective or even useless during a power surge because the extra load can prevent it from working properly, leaving your devices unprotected. Additionally, OSHA’s regulations only allow extension cords to be used as temporary wiring for up to 90 days. The use of unapproved extension cords is a violation of both OSHA and National Fire Protection Association codes. However, apart from the water in the contacts, the rest seems to me to be practically negligible. Mar 15, 2025 · When it comes to indispensable household items, the extension cord ranks pretty high on the list. Light extension cords that should have been fused at 10amps or even 5amps, which are instead fused at 13amps, because someone fitted a 'stronger fuse' when the 3000W heater they plugged into it kept causing it to blow Generally, they don't have the same problems as unfused extension cords, but nothings foolproof when there are fools around. Understanding these risks is crucial for home and workplace safety. Avoid daisy-chaining whenever Yes, there is a risk of failure involved with anything electrical, but I don't see why anyone would consider chaining extension cords inherently dangerous enough to ban. Jul 25, 2025 · In conclusion, while the temptation to extend your reach by linking extension cords is understandable, the risks associated with daisy-chaining extension cords are significant. This configuration connects multiple electrical outlets in a series. The reason is because it makes it very easy to overload a circuit. It can cause electrical overloads and fires. Any cords in place over 90 days are considered permanent wiring. So the simple induction to not connecting extension cords to the extension cords is a simple way to avoid problems. We consulted an expert electrician in order to find out which items should never be used with an extension cord. Another common solution that is ofter used is to create a “mixed daisy chain,” by interconnecting Daisy-chaining is one of the causes of these fires, along with overloaded circuits, damaged cords, short circuits, and the like. Some examples include plugging multiple extension cords into each other or plugging an extension cord into a power strip instead of a wall socket. May 1, 2025 · But even so, understand your extension cord’s maximum wattage limit before plugging any appliance into it. May 31, 2025 · Never plug extension cords or power strips into one another. Daisy-chaining can cause: Oct 11, 2023 · Why Is It Bad to Daisy Chain Extension Cords? It’s unsafe to daisy chain multiple extension cords together because they may not all have the same current capacity or voltage requirements. This is still far from ideal because the cords can be damaged, plugs can become loose, and extension cords are typically only rated for temporary use. Daisy chaining increases the risk of fire due to overloading circuits. Sep 9, 2025 · Direct Violation: Daisy chaining is a direct violation of OSHA standard, 29 CFR 1910. Other hazards associated with this activity is overloading the main circuit breaker. Consider factors such as cord length, gauge, and the environment in which the cord will be used. While this might seem like an easy way to increase available outlets, it significantly increases the risk of overloading circuits. This practice significantly increases the risk of electrical fires by creating resistance points at each connection. Jul 2, 2025 · The Dangers of “Daisy Chaining” Extension Cords Using multiple extension cords connected end-to-end, a practice often referred to as “daisy chaining,” presents significant risks and should be avoided whenever possible. 4 days ago · Daisy-chaining extension cords—plugging one extension cord into another—may seem like a simple solution when you’re running short on outlets, but it’s a dangerous practice. Aug 13, 2025 · Daisy chaining extension cords means connecting one extension cord into another, and then potentially another, to extend the reach of your power source. Unfortunately, once in place, extension cords tend to become permanent wiring and a fire hazard. Understanding these common mistakes could prevent a devastating electrical fire in your home. Daisy-chaining means connecting multiple power strips together, which can overload the circuit and cause a fire hazard. Undersized Cords: Using a cord rated for a lower amperage than the appliances require is a common mistake. Those include using the cord in the designated environment (indoor versus outdoor), avoiding daisy-chaining, and inspecting the cable regularly for signs of damage. According to Luby, though, this practice is a bad idea. Electrician Paul Martinez emphasizes that high-wattage appliances should be on dedicated circuits and extension cords should only be used for electronics. Exposed wiring, missing ground prongs, bad placement, and daisy chaining are all common mistakes when using extension cords. The safest practice is to use a single extension cord of the appropriate length for your needs Oct 29, 2024 · More than 3,300 home fires start from power strips and extension cords each year. The only significant risk I know is people disregarding the max amperage rating of Nov 19, 2018 · Does OSHA mandate extension cords cannot be plugged into each other? OSHA references 1926. New comments cannot be posted and votes cannot be cast. Outdoor extension cords are weather-resistant and can handle exposure to the elements, while indoor cords are more suitable for regular indoor use. Extension cords often implement outlet daisy chains. Power Strips and Dangerous Daisy Chains The supply of readily available electrical outlets is inadequate in some older buildings. That is equal to or larger than the wire in the wall. While it might seem like a convenient solution for reaching distant outlets, it introduces several risks related to electrical safety and circuit overload. By following a few key safety guidelines, we can ensure that our trusty extension cords continue to be a helpful, rather than dangerous, accessory. Of course, I see why it would lead to greater power dissipation, if the current was held constant while increasing circuit resistance. This practice increases resistance and heat, raising the risk of overheating and fire. In this DIY guide, I’ll walk you through the dos and don’ts of plugging one extension cord into another, ensuring your safety and the proper functioning of your electrical devices. Mar 26, 2025 · Conclusion Overloading power strips and extension cords is a common but dangerous practice that can lead to fires, electrical damage, and safety hazards. POWER STRIPS & DANGEROUS DAISY CHAINS: According to NFPA, electrical fires consistently rank among the top 5 causes of commercial building fires. Jun 27, 2019 · Admin Table of Contents [hide] 1 Is connecting multiple extension cords bad? 2 Are shorter extension cords safer? 3 Can extension cords be plugged into each other? 4 What is the disadvantage of using extension wires? 5 Is daisy chaining bad? 6 How many amps does an extension cord need? 7 When to upsize the length of an extension cord? But daisy chaining’that is, connecting two or more extension cords or power strips together to gain additional outlets and/or length’is a very bad idea because it can overload circuits and cause fires, especially if you mix extension cords and power strips. May 31, 2016 · Extending the length of an extension cord by “daisy-chaining” can lead to overheating the cord by overloading it, creating a serious fire hazard. The only reason they say it's dangerous to daisy chain is they assume everyone is an idiot and can't work out how close to 13 Amps they are. Another common solution is to create The maximum rated power of all the devices connected is about 1300 Watts (about 5,7 Amps) total which is much less than 16 Amps rated current of all thr extension cords. co. This implementation might create overloaded circuits. There are engineers and electrical experts online that will tell you that you can safely plug power strips together (“daisy chain”) or use power strips with extension cords. In this article, you will learn why surge protectors are important for protecting your electronics, what daisy chaining is, and the potential dangers of daisy chaining. Power strips can also implement outlet daisy chains. To avoid this, use power strips with built-in surge protectors or extension cords designed for a single device. It leads to increased resistance, overheating, and potential overloads that can trip breakers or start fires, voiding warranties and endangering property and occupants. The reason it is suggested not to 'daisy chain' extension cords together is because most people don't pay attention to amps and length so they might have a 75' 12-gauge cord and a 50' 16-gauge cord and just plug them together and try to pull 20 amps on the line. The issue is largely not related to the surge protectors; it's the same reasons you don't daisy chain extension leads or power boards: more impedance means more volt drop and less fault current. One of the reasons is the supply of readily available electrical outlets is inadequate in some buildings, especially older ones. This frequently happens in older homes or offices where there are not enough outlets for the space. Jul 22, 2025 · Find out why daisy-chaining power strips could pose serious dangers to your safety and devices—what you discover might shock you. And that 1300W is never the real usage as all the devices definitely don't drain maximum power all the time. Feb 11, 2025 · "To safely use extension cords," Mock said, "avoid overloading them with high-wattage devices, running them under rugs or furniture, or daisy-chaining multiple cords together, as these can cause overheating and fire hazards. We would like to show you a description here but the site won’t allow us. Jul 4, 2023 · Refraining from linking multiple extension cords, a practice known as daisy-chaining, is critical for safety. Oct 4, 2025 · Understanding the Risks of Daisy-Chaining Extension Cords Plugging one extension cord into another, often called “ daisy-chaining,” is a common practice, but it’s a hazardous one. But assuming you don't have a choice, is there anything that can be done to make the whole thing safer? Extention coord of the roll type usually can't handle the max current when rolled up, the will overheat. But not everything is appropriate to use with them. That’s why it’s considered un-safe. May 21, 2025 · One of the most dangerous extension cord mistakes is plugging multiple cords together—also known as daisy-chaining. Nov 13, 2020 · 3. If you then link multiple such cords, you are multiplying the risk. Apr 29, 2022 · Ensure extension cords are properly rated for their intended use and meet or exceed the power needs of the appliance being used. Proper plug strips have circuit breakers on them. 303 in Letters of Interpretation. Regularly inspect cords for frays, discoloration, or loose connections and replace damaged items immediately. Conclusion Extension People working from home have been warned about overloading sockets, daisy chaining, and charging devices on beds during lockdown. For instance, a string of extension cords connected end-to-end to power several items would constitute a daisy chain. Feb 2, 2021 · It is definitely safe to daisy chain surge protectors and extension cords if you know what you’re doing. 403 & 1910. Alternatives to Daisy Chaining The Office of Compliance gave several safe solutions in place of daisy chaining power strips and extension Mar 26, 2025 · DON’T “daisy chain” power strips and extension cords—just don’t. Oct 24, 2024 · Daisy-chaining" occurs when multiple extension cords or power strips are connected together in a series. Alternatives to Daisy Chaining The Office of Compliance gave several safe solutions in place of daisy chaining power strips and extension Daisy chaining power extensions or adapters using other extensions is dangerous. To prevent electrical fires in the workplace, follow the do’s and don’ts below. To meet power supply needs, extension cords or surge protected power strips are often interconnected, or “daisy chained The best solution is to get short, heavy duty extension cords and use them between the wall outlet and individual power strips. This practice is strictly prohibited by Cal/OSHA and the Office of the State Fire Marshal. If you chain a bunch of power strips together to give yourself unlimited outlets in a room, you can easily plug in more power than the wiring and/or the circuit was made to handle. The "it's dangerous to daisy chain" thing is a myth, it's perfectly safe so long as the total current draw is less than 13A. By understanding the proper uses and limitations of power strips, you can stay safe from potential electrical hazards caused by their misuse. What is the difference between this and if one were to instead plug these 3 devices into an extension cord that is "daisy chained" into another extension cord? Archived post. To avoid any mishaps, it’s crucial to understand the limitations and risks involved in daisy-chaining extension cords. 10 Mistakes EVERYONE Makes When Doing DIY Electrics!💥 Daisy Chain Extension Leads Are SUPER DANGEROUS! 😱 Jan 24, 2024 · Extending the length of an extension cord by “daisy-chaining” can lead to overheating the cord by overloading it, creating a serious fire hazard. Jul 16, 2007 · Daisy chaining increases the likelihood of misuse, excessive voltage drop and overloading the extension cord and may create a fire or shock hazard, therefore, UL 817 requires that cord sets be provided with a tag label that identifies the dos and don’ts of using an extension cord to avoid dangerous hazards. When using multiple extension cords, there are two fallacies that I can see: People just see more sockets and connect more and more devices, going over the 3500 W of allowed current. May 22, 2025 · Daisy chaining refers to connecting multiple electrical devices to a single outlet using extension cords. The above are four conditions that need to be met when daisy-chaining power strips, extension cords, and surge protectors at home. Jun 21, 2023 · While it may seem like a convenient solution to limited outlet space, daisy chaining surge protectors can be extremely dangerous and put your electronics at risk. Explore the safety of daisy-chaining power strips, discussing extension cords, surge protectors, and electrical safety. Don't daisy-chain extension cords. That's when it gets dangerous because you are doubling the draw on the 16-gauge cord. Don’t daisy-chain your power strips/extension cords together. Oct 6, 2023 · Never overload an extension cord or daisy-chain multiple cords together, as this can create a fire hazard. " And all these risks are exacerbated by using extension cords as anything other than a temporary measure. Ever wonder what really happens when you plug a 1500-watt space heater into different extension cords? Or worse… a whole Christmas-tree daisy chain of skinny cords? In this video, I set up three Oct 24, 2024 · The practice of daisy chaining, or plugging extension cords into other extension cords, leads to overheating and is strongly discouraged. To meet power supply needs, extension cords or surge protected power strips are often interconnected, or “daisy chained,” to readily provide more outlets and/or to reach greater distances. The general rule of thumb is to use a single, appropriately Jul 29, 2025 · Daisy-chaining extension cords with insufficient gauge wire or connecting them to an already heavily loaded circuit significantly increases this risk. #12 or #14. Make sure to also purchase the length you need to avoid daisy chaining multiple extension cords together. Second, daisy chaining surge protectors is dangerous because it's easy to overload if you don't do the math properly. While these convenient devices help us power our increasingly connected lives, many of us are unknowingly creating serious safety hazards. Jul 28, 2025 · Why Daisy-Chaining Power Strips is a Bad Idea Daisy-chaining power strips is the act of plugging one power strip into another power strip, which is then plugged into the wall outlet. Right now, there are 3 separate things charging on my Mac, which is plugged into an extension cord. The longer the extension lead gets the less power it receives from the original source increasing the risk of shorting and sparking. Daisy chaining multiple power strips together One of the most dangerous yet Feb 28, 2022 · Daisy-chaining is when you plug a power strip or extension cord into another power strip or extension cord, often in a series of three or more such devices. Oct 30, 2025 · Despite popular beliefs, it is actually not dangerous if you decided to daisy chain surge protectors and extension cords to each other. Nov 15, 2020 · The cable of the extension cord should be specified in a way that it can stand the current of around 16 A. Jun 18, 2024 · Extension cords may seem like a harmless household staple, but did you know they cause roughly 3,300 home fires each year in the United States alone? These seemingly benign cords can quickly turn into a dangerous liability when used improperly, leading to property damage, injuries, and even fatalities. Sep 15, 2020 · Electricians don’t like extension cords or power strips, and they hate daisy chains even more. Jan 19, 2025 · Plugging extension cords into other extension cords is another big "no-no" in the electrical world. Mar 16, 2025 · An outlet daisy chain is a wiring configuration. Jun 2, 2024 · Avoid Daisy Chaining: As mentioned, connecting multiple power strips together, known as daisy chaining, is a dangerous practice and should be avoided. Although the name is pleasant, daisy- chaining is quite dangerous and should be avoided. Choose the Right Extension Cord Selecting the right extension cord is crucial to ensure safe and efficient power connections. Power Strips and Dangerous Daisy Chains The supply of readily available electrical outlets is inadequate in some buildings, especially older ones. Many a time, we have no choice but to extend the length of one power strip or surge protector using another extension cord in order to reach far-flung wall A/C outlets. Jun 27, 2023 · Daisy-Chaining Power Strips First things first, if you’re thinking about daisy-chaining power strips, it’s crucial to understand the potential hazards involved. Light-duty cords should not be used for supplying power to a number of items at once—especially those which are considered high energy. Consideration needs to be given to the type of extension cord as well. See full list on intersafe. While it might seem like a convenient way to extend your reach, it significantly increases the risk of electrical hazards, including overheating and fire. 303(b)(2), which requires that extension cords be used within their rating as noted on the label and/or product instructions. I know in general the rule of thumb is daisy chaining multiple extension cords is bad, but after reading a few posts it appears that as long as you're limiting what appliances are connected, you should actually be okay. The people that daisy chain power strips argue that the practice is only dangerous if you overload the circuit or the power strips. Dec 6, 2024 · How Daisy Chaining Works In a daisy chain, a single wire runs from one device to another, connecting all devices in sequence. Oct 9, 2017 · Consideration needs to be given to the type of extension cord as well. Get a fused one as someone else suggested for extra safety. This prolonged activity could increase the chance of fire and electrical shock to the end user. uk Feb 6, 2025 · Daisy chaining, or connecting multiple extension cords together, is perhaps the most dangerous yet prevalent mistake homeowners make. Aug 23, 2023 · ERAC Energy August 23, 2023 · SAFETY TIP: Plugging multiple extension cords (cables) together is dangerous Here is why: It happens when one extension cord is not long enough to power devices in areas without socket outlets One is then tempted to achieve longer lengths by connecting (daisy chaining) two or more extension cords together Jan 31, 2025 · 'Daisy-Chaining' Power Strips or Extension Cords It might be tempting to plug a power strip into another power strip (or an extension cord) to create a longer reach or power more devices. Why is daisy-chaining dangerous? Daisy Mar 28, 2025 · To prevent this, it’s important to buy the right extension cord for your requirements. Most extension cords are only rated for a maximum of ten amps or 1200 watts. DON’T exceed the rating of the cord. Essentially, you plug an extension cord into the wall outlet, then plug another extension cord into the first extension cord, and so on. It increases the number of connections, but that's a miniscule risk compared to the 5+ connections an extension cord might have on its own. Feb 3, 2025 · What is a daisy chain? Learn daisy chaining meaning, how to safely use power strips, surge protectors, and monitors without causing overloads. I suspect this is a variation of the above - don't exceed 25m; every connection adds additional contact resistance; water in the outdoors connections can be a problem - in general, it just adds risk. And getting the math wrong in eletrical work is dangerous. Feb 26, 2024 · What is daisy-chaining? Daisy-chaining is when multiple devices are plugged into and drawing power from a single socket. Mar 12, 2024 · Linking multiple extension cords together, a practice known as daisy chaining can lead to an excessive load on the cords, increased resistance, and potentially overheating. Jun 9, 2025 · But before you start linking power strips, it's important to understand how daisy chaining works, the risks involved, and how to use a Daisy Chain Power Strip safely and effectively. This is a term that refers to power strips and/or extension cords being plugged into other power strips and/or extension cords. Daisy chaining is the practice of connecting multiple power strips or extension cords together. The electrical load for this strip should be evaluated for overloading. Aug 1, 2023 · 3. But the small #18, non grounded cords can get hot and start a fire if used for something like a room heater, iron, microwave oven, or other Surge protectors, power strips, or extension cords are not a substitute for permanent wiring. Oct 11, 2025 · Daisy chaining extension cords, a forbidden practice by safety organizations, creates major electrical and fire hazards. Read about the risks here. Jul 27, 2025 · Can you connect multiple extension cords together? Generally, you should avoid connecting multiple extension cords end-to-end, a practice known as daisy-chaining extension cords. If at any time the surge protector or plug strip is hot to the touch remove and replace the unit. For something so widely used, extension cords can cause a shocking amount of destruction, even death, if not used properly. ivxyxfglbpfoqqmrkhbkxtcauofiqildbrxndvameknhfauqhxeixttcaifcimnvjqwhvwguuugjz