I'd like to install a whole house surge protector. Using the GoogleWeb,
there appears to be a variety of types with all sorts of prices. I really
don't care about the price as long as it's worth it. The Intermetics are
about $60.00 while the Square D's are $275.00. The guy doing my electrical
work recommended I buy the Square D online.
What are you guys installing now? Thanks.
Local co-op installs lightning arresters and haven't ever had any issues
even in SW KS t-storm country.
What problems have ever had have been on phone line to modems, faxes,
etc., not on power.
There's too much money hooked up to electric/phone/cable to go
These are good for coax:
On Mon, 2 Nov 2009 08:52:03 -0800 (PST), RicodJour
The thing you have to be sure of is that your power and your
TV/Telco/Satellite surge protection all connect to the same grounding
system with as short a bonding jumper as possible. It is best if they
are all grouped together.
Otherwise your equipment will bond them together ... explosively..
Says they are "listed to UL 497" which may or may not mean they are UL
listed. Should be better than the center conductor protection provided
by a cable entry ground block (none).
The best information on surges and surge protection I have seen is at:
- "How to protect your house and its contents from lightning: IEEE guide
for surge protection of equipment connected to AC power and
communication circuits" published by the IEEE in 2005 (the IEEE is the
major organization of electrical and electronic engineers in the US).
- "NIST recommended practice guide: Surges Happen!: how to protect the
appliances in your home" published by the US National Institute of
Standards and Technology in 2001
The IEEE guide is aimed at those with some technical background. The
NIST guide is aimed at the unwashed masses.
Both emphasize what gfretwell said above. The NIST guide suggests most
damage is from high voltage between power and phone/cable wires (modems,
faxes, TVs ...). If phone or cable entry protectors are distant from the
power service, so a short bonding jumper is not possible, SquareD and
others make service panel surge suppressors that have ports that
incoming phone and cable attach to and ports that then supply phone and
cable to the house.
Get a suppressor that is listed under UL1449. The IEEE guide recommends
suppressors with ratings of 20,000 - 70,000 amps per service wire, or in
high lightning areas 40,000 - 120,000 amps per wire. Because there is no
standard method of measurement, Joule ratings are not a reliable way of
comparing products. I would only buy from a well known company. If your
service panel is SquareD, a SquareD suppressor that plugs in like a
circuit breaker is easiest to install.
Intermatic IG3240 would be a good choice. At around $125 it's about
twice the price of the entry level Intermatic, will handle a much
larger surge current and I think represents good protection vs price
The Square-D ones are, at retail, about double the price to the trade. That
way the electrician can make a profit by using the Square-D parts.
So, then, compare the specifications of the alternative modules. If the
specs are roughly equivalent, then factor in the price.
You actually don't need an electrician to install these things. If your hand
fits a screwdriver, you've got all you need.
I've had the Square D installed in my house for 8 years and still working
great! Not one fried electronic thing since this was installed. (I also have
high quality power strip surge protectors where electronic things are, but
you can't use these for things like ranges which have electronic
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