Bypassing the ground negates most of the benefits of using surge protectors, since typically two-thirds of their MOVs are tied to the ground leg. Never use an adapter to plug a surge protector into an ungrounded outlet.The worst-case scenario is that something starts melting-that’s the opening act for an electrical fire. The best-case scenario is that you trip a breaker or blow a fuse. This is an easy way to exceed the current ratings on the surge protector and even the wiring in your walls. Never daisy-chain multiple surge protectors to add outlets, and never plug a surge protector into an extension cord.Attractive, slim design was a plus, and we considered well-designed clamps, hooks, or holes for mounting the surge protector on a table or baseboard to be a bonus. Sensible port layout and overall design: To keep oversize plugs from blocking nearby outlets, we looked for adequately spaced ports.Long power cord: If a surge protector has a power cord, longer is better because it’ll be safer and more convenient to use.However, a warranty covers only defects and won’t help you when the surge-absorbing components wear out as designed. At least a one-year warranty: This is a bare-minimum requirement for something that you’re trusting to protect high-priced equipment and that you’ll be replacing every few years.USB ports are handy for charging a phone or other small device without a wall charger, but since most won’t charge a phone at top speed, we don’t think they add much value. Convenient auxiliary ports: We preferred models with coaxial connectors, which are commonly used in AV devices, as well as telephone ports for a landline phone or dial-up internet connection.But since this is just an estimate, we didn’t put a lot of stock in it. High joule rating: A joule rating tells you about how much energy the surge protector can absorb before it fails, so higher is better.Lower is better when it comes to let-through voltage, the measure of how much extra voltage reaches your electronics. A surge-protection rating of 400 volts or better: Although we verified each model’s abilities in our own electrical testing, we required that they be rated by one of the major product-safety corporations, UL or ETL, to bring a surge down to (at most) 400 volts. At least eight AC outlets: We required at least eight AC outlets for the main and top-of-the-line contenders, and at least three for our light-duty pick.Otherwise, at minimum, we required each model to have an indicator light that signals when its surge-protection capabilities have worn out. Automatic shutoff: We preferred this feature because it ensures you’ll never leave your equipment unprotected. To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy Notice. You can change your choices at any time by visiting Cookie Preferences, as described in the Cookie Notice. Click ‘Customise Cookies’ to decline these cookies, make more detailed choices, or learn more. Third parties use cookies for their purposes of displaying and measuring personalised ads, generating audience insights, and developing and improving products. This includes using first- and third-party cookies, which store or access standard device information such as a unique identifier. If you agree, we’ll also use cookies to complement your shopping experience across the Amazon stores as described in our Cookie Notice. We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences and to provide our services, as detailed in our Cookie Notice.
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