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Posted by Fred on August 17, 2005, 7:17 am
> Hello:
>
>
>
> Will be putting in a "secondary" wired in surge protector (an Intermatic
> AG 2401 IND )
>
> to try and protect a new furnace circuit board that is apparently
> susceptible
>
> to lightning induced transients. It fried during last lightning storm.
>
> Eventually, I hope to replace the electrical service box, and, when I do,
> I will install
>
> a whole-house variety. But for now, will have to settle for the
> point-of-use, wired in variety.
>
>
>
> There is the typical on/off furnace switch located in a EMT tubing run,
> about a foot or so from the furnace proper. This seems like a good place
> to wire it in, and install it.
>
>
>
> Have been thinking a bit about whether it makes more sense to wire it in
> on the upstream side of the switch, or whether it should be placed on the
> downstream side (the end closer to the furnace) ?
>
>
>
> Seems to me that it probably doesn't matter at all, but thought I'd ask.
>
>
>
> Any thoughts on ?
>
>
>
> Thanks,
>
> Bob
>
>
Don't you want to installed it way, way upstream where the breaker panel is?
That would protect your house wiring insulation as well. With lightning
where the transient is in the nano second range (super fast) anything could
happen and surge protection is not 100% guarantee. Transient will seek a
path to you furnace circuit board, or anything else, in the most
unpredictable manner in a worst case scenario. In any case, make sure you
have a good house ground, circuit board ground plane is solidly grounded and
disconnect the main breaker during the next big lighting storm if you could.
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