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Can You Plug a Surge Protector into a Surge Protector: Expert Guide

Can You Plug a Surge Protector into a Surge Protector: Expert Guide

Safeguarding our electronic devices from unexpected power surges is more crucial than ever in today's digital age. This is why surge protectors have become essential components in our homes and offices, acting as guardians against the abrupt voltage spikes that can wreak havoc on our sensitive gadgets.

Yet, as we accumulate more gadgets, the demand for additional outlets grows, leading to the inevitable question: "Can you plug a surge protector into a surge protector?" This guide delves into the intricacies of surge protectors, explaining their function and components, dissecting the potential risks of plugging one into another, and unveiling expert insights and safer alternatives surrounding their optimal use. Read on to learn more.

plug one surge protector into another

Can You Plug a Surge Protector into Another Surge Protector

At first glance, the idea of plugging one surge protector into another—known as daisy chaining—might seem like a convenient solution to extend power supply and surge protection capabilities. It stems from a common scenario in many households and offices: the need for more electrical outlets than are readily available. But can you daisy chain surge protectors just like that?

Surge protectors, with their multiple outlet designs, offer a tempting option for expansion by plugging one unit into another. However, this practice raises significant safety concerns and questions about the effectiveness of surge protection under such arrangements.

Safety Concerns

The primary concern with daisy chaining surge protectors involves the risk of overloading electrical circuits. Each surge protector is designed to handle a specific electrical load, and by connecting them in series, there's a potential to exceed this limit, leading to overheating, damage to connected devices, and even fire hazards. 

Additionally, daisy-chaining can undermine the very protection you seek from a surge protector. The effectiveness of a surge protector depends on its ability to direct excess voltage safely to the ground. When surge protectors are linked, this grounding pathway can become compromised, exposing your devices to the brunt of electrical spikes. 

Explanation of Surge Protectors

Understanding why daisy chaining surge protectors is not advisable requires a basic knowledge of the principles behind these devices. Let's have a closer look: 

Definition of surge protectors

Surge protectors are sophisticated devices designed to protect our electronics from voltage spikes. A voltage spike or surge can occur due to various reasons, including lightning strikes, power outages, or significant changes in electrical loads. A surge protector actively monitors the incoming voltage and diverts excess voltage away from connected devices and safely into the ground, thereby preventing potential damage.

Components of surge protectors

The efficacy of a surge protector hinges on its internal components and their ability to detect and manage excess electrical energy. The most pivotal of these components are:

  • Metal Oxide Varistors (MOVs): MOVs are the heart of a surge protector. They are semiconductors that can detect the voltage level. Under normal conditions, they allow the electrical current to pass through uninterrupted. However, upon detecting an overload, MOVs absorb excess voltage and divert it to the grounding wire, thereby shielding connected devices from voltage spikes.
  • Internal Circuitry: Beyond MOVs, surge protectors contain sophisticated internal circuitry that continuously monitors the flow of electricity. This circuitry is what enables the device to respond instantly to any abnormal spikes in voltage.
  • Thermal Fuses: These safety devices are designed to cut off power if the surge protector overheats, which can happen if it's overloaded or if an MOV fails after absorbing too much energy.

Expert Opinions and Recommendations

Electrical safety experts and industry guidelines strongly advise against the practice of daisy chaining. Let's delve deeper into these insights:

Insights from experts:

When it comes to the practice of daisy-chaining surge protectors, the consensus among electrical safety experts is clear: avoid it. This unanimous advice stems from the inherent risks associated with connecting multiple surge protectors together.

This practice not only diminishes the effectiveness of surge protection but also poses significant fire hazards. Moreover, it contravenes the safety guidelines laid out by product manufacturers and recognized safety organizations. These entities typically design surge protectors to function as standalone units, and using them otherwise can void warranties and lead to unsafe conditions.

Safety guidelines

  • Single Surge Protector per Outlet: Opt for using one high-quality surge protector per electrical outlet. This approach minimizes risk and ensures that the surge protector can perform its duty without interference from additional connected devices.
  • Avoid Overloading: It's crucial to understand the capacity of your surge protector and not to overload it. Each surge protector is designed to handle a certain amount of electrical load. Exceeding this can lead to overheating and potentially fire hazards.
  • Verify UL Certification: Look for surge protectors that are certified by reputable testing organizations such as Underwriters Laboratories (UL). UL certification ensures the device meets stringent safety standards.

Considerations and Alternatives

As we've learned, daisy-chaining surge protectors is not recommended due to the associated safety risks and the potential for diminished protection. Fortunately, there are several safer and more reliable alternatives:

Alternatives to Daisy Chaining

  • Surge Protectors with More Outlets: Opt for a single surge protector power strip that offers a higher number of outlets and a substantial joule rating to accommodate all your devices. This alternative negates the need for multiple surge protectors and maintains the safety and effectiveness of your surge protection setup. Some models are designed with spaced-out outlets to accommodate bulky adapters without blocking adjacent outlets. 
anker 350 surge protector power strip 
  • Upgrading Wall Outlets: Consider installing more wall outlets or replacing standard wall outlets with ones that have built-in surge protection. This provides a permanent solution for safeguarding your electronics directly at the source of power.
  • Whole-House Surge Protectors: For comprehensive protection against external surges (e.g., lightning strikes), consider installing a whole-house surge protection system. These systems are installed at your home's electrical panel and provide surge protection for all electrical circuits in the house, serving as a first line of defense against external power spikes.
  • Uninterruptible Power Supply (UPS): A UPS provides a backup power source in the event of a surge or power outage, offering not just surge protection but also a safeguard against data loss. This can be particularly beneficial for devices that should not be abruptly powered off, such as desktop computers.


Throughout our exploration of the question, "Can you plug a surge protector into a surge protector?" we've navigated through various layers of information, from the basic functioning of surge protectors to expert recommendations. Daisy chaining surge protectors is not recommended due to the safety concerns and the compromised protection it offers to your valued electronic devices. Instead, adhering to safety guidelines and considering alternatives such as surge protectors with more outlets or UPS systems can ensure your devices are safeguarded against unexpected power surges.


Can I plug two surge protectors together?

It's strongly discouraged to plug one surge protector into another, a practice known as "daisy-chaining." This can overload the surge protectors, potentially leading to a fire hazard and reducing their effectiveness in protecting your devices from power surges.

Is it a fire hazard to plug a surge protector into a surge protector? 

Yes, it can be a fire hazard to plug one surge protector into another, a practice known as "daisy chaining." This setup can overload the circuit, potentially causing overheating and increasing the risk of fire.

Is it OK to daisy chain surge protectors?

No, daisy-chaining surge protectors is not recommended. This practice can overload the electrical system, potentially leading to a fire hazard, and might also void warranties for connected devices.

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