How Many Amps?

Helping you choose the right plug-in model.

If you are unsure about which size surge suppressor to purchase – a 15 amp or 20 amp model, you can follow these instructions:

  • Consult your product manual or equipment label for load information.
  • If the load information is listed in amps, add up the number of amps for each product you would like to protect on one Zero Surge unit to determine the full load. This will be your minimum size requirement.
  • If the load information is listed in watts, not amps, a simple calculation can be performed.
  • To calculate from watts to amps, divide the total watts by 120 (600 watts = 5 amps). Do this for all of the equipment you would like to protect, total them, and you will have your minimum size requirement.

The chart below contains size requirements for some common applications:

Plug-in Application 15 Amps 20 Amps
Computer / IT
Simple Computer System        x
1-3 Computers and Peripherals        x        x
UPS        x
Printer / Copier        x        x
Gaming Equipment        x
Home Electronics
Home Theater        x        x
Simple TV / DVR / DVD        x
Sound System        x        x
Miscellaneous
CPAP Machines        x
Sump Pump        x        x
Aquarium        x
Treadmill        x        x
Life Alert Device        x
Baby Security Monitor        x
Video Monitoring System        x
Auto Sleep Bed & Accessories        x

To insure you are choosing the right size, calculate the amps required using information from the product manual or label. If it lists the Watts instead of Amps, a simple calculation can be performed. Divide the total Watts by 120 (600 watts = 5 amps). Do this for all of the equipment you would like to protect on the same Zero Surge unit, total them, and you will have your minimum size requirement.

bullet Home Office/Computer

Most computers draw less than 5 amps so a 15 amp suppressor would do the job for a typical computer set-up.  If putting ahead of a UPS to protect your battery back-up, a 2 outlet, 15 amp unit is required. To insure you are choosing the right size, calculate the amps required (see above).

bullet Home Electronics

A 15 amp model is recommended for home theater set-ups including a DVR, sound system, and other components.   If the TV and sound system have “extra” high load accessories or 20 amp receptacle requirements, however, you would need a 20 amp model (which requires a 20 amp wall receptacle and wiring).

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