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#38145 - 05/15/04 04:35 PM hello lightning strike
sparky70444 Offline
Junior Member

Registered: 03/21/04
Posts: 2
Loc: louisiana u,s,a
Hello all this is a nice forum i read it daily i am a industrial maint. electrician i dont do much residential , But for a neighbor i went to check his well pump after a lightning strike on a tree 50 yards away? well he had 240 on the pressure swtch and no pump so i ohmed it and yep wide open i had too go too work so he called a plumber but any way? I know its all theory but would did the current do when it traveled down the tree too the ground? Did it dissipate into all directions or find a path such as a well pump casing and finally can anything be done too stop it from happening again any hello from louisiana and all be safe bye

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#38146 - 05/15/04 10:57 PM Re: hello lightning strike
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
Although there is some brand-specific information, one reference for submersible water pumps is www.franklin-electric.com/Manual/contents.html

Lightning hits can be gruesome and merciless to a lot of electrical gear. There are usually a lot of variables in the degree of damage a hit causes. Good luck.

Examples of general info on lightning-protection components… www.comm-omni.com/ www.geindustrial.com/products/brochures/9l10f.pdf

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#38147 - 05/16/04 07:11 AM Re: hello lightning strike
FWL_Engineer Offline
Member

Registered: 05/15/04
Posts: 53
Loc: Barnet, Hertfordshire, UK
The problem you have is that things like Motors and Transformers love magnetic fields..and lightning strikes are accompnaied by ,albeit momentary, very large ones.

It is quite common for nearby strikes to induce dangerous, fatal or at least damaging voltages into any large inductive circuit/device within range of the mag field.

Most people who claim lightning strikes are usually here to speak because they actually got zapped by large voltages induced in them byt the strike field. Normally the bolt would kill instantly from the heat generated by the strike occuring directly to a person.
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