Monday, Jul 16, 2012 at 18:43
Landseka.... we run an automotive electrical business and I have only seen happen a few times and zap the ecu's by connect the negative to the positive and positive to the negative..... my customers must be lucky.
Never seen it happen from a positive to positive jump start even with no anti zap box.
But if it does happen it's an easy fix..... you can buy refill cans of smoke because everyone knows when the smoke runs out it stops working..... replace the smoke and all's sweet.
Had a call out a 6.30am one morning form an earthmoving contractor who had replaced the battery and the machines still would not start...... "must be a dud battery" he said?
Got a phone call about 30 minutes later as this guy had grabbed another battery from another machine...... he said to me " the one with the cross is the one the black lead goes on to."
And I politely replied "AAArrrhhh NO!"
Then there was silence for a few seconds and this faint voice came back and said "Oh".
PJR most electrical gear have quenching circuits inbuilt can withstand power surges but like most things they can only handle so much.
Surge protectors at
home are the same...... get one big surge and it may save your gear but get another surge shortly after and you'll be on the phone to your insurance company.... that's if your phone still works.
The funny thing with surge protection is you never know when it has saved you and if it still works..... unless your checking it every few minutes.
When a surge protector works it basically blows it's self up but power still flows..... and it does is dump the surge to earth.
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