Point-of-Use Surge ProtectorsJanuary 13th Fact-of-the-Day
Apoint-of-use surge protector should protect each item of expensive electronic equipment in a home or office even if there is a service entrance surge protector on the incoming power line. There are several reasons this is important. Service entrance surge protectors sometimes fail if there is a direct lightning strike to power mains. However, the magnitude of the surge from a mains lightning strike likely will be reduced to some extent by a service entrance surge protector even if it fails. It may be reduced enough that 'second-line-of-defense' point-of-use protectors will be able to prevent damage to expensive equipment. Furthermore, lightning may directly strike wiring that is behind service entrance protection. ©2005 Martek, International. All rights reserved.
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