Friday, April 27, 2012

Surge protector strips: grounded and protected indicator lights

Recently I was posed the questions: "Are both the RED and GREEN indicator light supposed to be on at the same time?" and "What is the difference between  the Grounded and Protected indicator lights?" 


The green grounded light and the red protected light on the plug-in protectors serve two 
different functions. 


The green light indicates that the receptacle has a ground reference. Grounding references are vital for surge protection because Ground is the exit pathway for the excess surge current. No Ground reference and your surge protector will not work. This is why surge protectors are not used on 2-prong outlets. Be mindful, some 3-pronged outlets may not have Ground tied to them and this will be evident when you plug-in the surge protector and the green light is not illuminated.


Ungrounded outlet
Grounded outlet
















The red light indicates that the surge protection elements are working. If the red light extinguishes then the surge protector is no longer protecting your equipment. 


Our surge protectors are designed so that they shutdown when the surge protection elements have expired. Always be mindful of the "failure mode" of your surge protection. Some manufacturers products will continue to allow current to flow to your equipment after the surge protection elements have expired. So unless you notice an extinguished indicator light you won't know that your equipment is now unprotected.  
surgeassure SAP6T2V1

For more FAQ's check the website.
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10 comments:

  1. Sizzling LEOJuly 7, 2015 at 4:55 AM

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  2. lightningprotectorOctober 24, 2017 at 3:45 AM

    Thank you for providing the great information on a Surge protection Device . The pictorial representation is very helpful for every new user.

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  3. reenrenNovember 16, 2018 at 8:51 PM

    thank you for this clear information.

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  4. KentDecember 13, 2018 at 5:56 PM

    Thank you!!!!!!

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  5. Ener-jblogDecember 13, 2018 at 9:40 PM

    I found your blog very useful and informative. Thanks for sharing.
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  6. UnknownMay 29, 2019 at 12:40 AM

    As most everyone on this sight has written, I too thank you, thank you very much!

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  8. UnknownJuly 28, 2020 at 10:37 PM

    The Red light on my Sentry is labled Surge! And neither I nor Comcast can get my Cable Sugnal back?

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  9. Jimmy NoorOctober 28, 2020 at 2:57 AM

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