"Robert11" wrote in message
. ..
Hello,

Having a new service box installed in a residence.

Electrician has never used these before, so thought I'd ask here.

Was thinking of purchasing, and having him install, an Intermatic Whole
House Surge Suppressor
Model 4870 in the new box. Have had several large lightning storms in the
past, and one nearby strike fried the control board on our furnace ! The
Intermatic unit isn't all that expensive, about $80 or so.

Any of you folks ever used this model ?

Worth doing ? Thoughts on ?

BTW: If they do ever take a big hit, do they (usually) fail open or
closed ?

e.g., would the MOV's be shorting the hot to neutral/ground after a big
hit, such that the unit would have to be removed prior to re-initiating
service ?

Thanks,
Bob


Lightning wants the shortest path to earth. Make sure that the electrician
installs at least two ground rods and although the code allows them to be a
minimum of six feet apart I suggest at least sixteen feet between rods.