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Surge protector
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westom
Posted 6/19/2016 08:50 (#5363555 - in reply to #5361382)
Subject: RE: Surge protector


Omar - 6/17/2016 21:28
Only way to find out if they are good is for them to destroy themselves taking the bullet.

If a protector sacrifices itself, then a current is incoming on one path. At the same time that same current is outgoing on another path. If a current 'sacrifices' a protector, then same current is also passing through attached appliances (ie computer). Where is protection? Only exists in fictional assumptions.

Sacrificial protectors have obscene profit margins. Undersizing a protector gets the naive to recommend it and buy more.

Protection is always defined by an answer to a simple question. Where do hundreds of thousands of joules harmlessly dissipate? That means nobody even knew a surge existed because nothing fails. Honest answers always include numbers.

A destructive surge can be hundreds of thousands of joules. How many joules does that Tripplite protector absorb? 1280 and never more than 2560 joules. 'Fire' should be a concern.

Once a surge is inside, a protector must either 'block' or 'absorb' that energy. How does its 2 cm protector part 'block' what three miles of sky could not? It doesn't. But it is recommended by many who know only what advertising has told them to believe.

For over 100 years, that question has been answered by something completely different and unfortunately also called a surge protector. This connects a surge to earth BEFORE that current can enter. Because even those near zero plug-in protectors must be protected.

Lightning is typically 20,000 amps. So a minimal 'whole house' protector is 50,000 amps. Effective protection means nothing - especially not a protector - is damaged even by direct lightning strikes. But again, where do hundreds of thousands of joules dissipate? In the only item that actually does protection - single point earth ground.

That Murray is only 40,000 amps. But even that can be superior to anything that others have recommended - if connected low impedance (ie hardwire has no sharp bends) to earth.

An effective protector connects low impedance (ie less than 10 feet) to what does protection - earth ground. Just another reason why 'magic box' plug-in protectors do not claim to protect from potentially destructive surges. No earth ground means no effective protection.

If any one appliance needs protection, then everything needs that protection. If a 'whole house' solution is not implemented, then a surge is inside, incoming to every household appliance, and hunting destructively for earth ground. Informed consumers properly earth one 'whole house' solution for about $1 per protected appliance. That is a 'secondary' protection layer. Homeowners are also strongly encouraged to learn of and inspect their 'primary' protection layer. Each protection layer is only defined by the one item that actually does protection. That harmlessly absorbs hundreds of thousands of joules. Earth ground. As well understood over 100 years ago.

A protector is only as effective as its earth ground. Those 'magic box' protectors have no earth ground - and will not discuss it. What harmlessly absorbs hundreds of thousands of joules? And does it for about $1 per protected appliance?


Edited by westom 6/19/2016 09:00
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