| Whole House Surge Question I have a sub panel so if I want to install a whole house surge protector do I need to install separate protectors in both the main and sub?
If I only need to install one in one panel, can it be installed in the sub or does it need to go into the main?
Thanks |
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 SparkChaserPremium
join:2000-06-06
Downingtown, PA
kudos:3 | the whole house protector gets fed through a breaker. Ideally, the first one after the main feed. |
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 davidgGood Bye My FriendPremium,MVM
join:2002-06-15
none | reply to jrbianch
it REALLY depends on the surge protector. if it is just you basic protector that is fed off a 2 pole breaker, then for best results you want it in the main panel but in a pinch it could be installed elsewhere and you give up some response time. ideally you want them physically as close to the main as you can get, even a foot or so or additional wire will delay the response time slightly and allow for some surge to get past.
i have some that are made to go inline between the incoming feed before the panel, they actually carry the full 200A rated load thru them. THESE are very specific as to where they must be installed. and not a DIY project at all!
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 nunyaWho is John Galt?Premium,MVM
join:2000-12-23
O Fallon, MO
kudos:8 | reply to jrbianch
It should be in the main panel. I also wanted to mention that these do not negate the need for surge protectors on expensive electronics. |
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 tschmidtPremium,MVM
join:2000-11-12
Milford, NH
kudos:8
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| reply to jrbianch
As nunya  posted it needs to be installed at the main panel. That limits external surges from entering the building and dumps the energy into ground.
You should also think about installing surge protectors on all metallic conductors (telephone, cable, Sat, TV antenna, etc) entering the building.
If you use point protection for individual devices you want a protector that protects all metallic conductors that run any distance. For example, if you are protecting a device that has AC power, telephone and Ethernet want a protector that passes all conductors. What you are trying to do is minimize voltage differences between conductors.
tom |
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| reply to jrbianch
Nunya
Do you have any recommendations for a manufacturer of the whole house surge suppressor |
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nunyaWho is John Galt?Premium,MVM
join:2000-12-23
O Fallon, MO
kudos:8 Reviews:
 ·Charter
·surpasshosting
| If you have a Murray / Siemens / ITE / Gould panel, Siemens makes a nice little in-panel unit (no external wart) - QSA1515SPD & QSA2020SPD.
Cutler Hammer (Eaton) makes a nice unit - CVX050 and CVX100.
Intermatic has some nice "all-in-one" solutions - Panelguard IGI300-4T-2C
The main qualification for any SPD is it should be UL1449 listed (revision 3).
I think my favorite line would be Cutler Hammer (Eaton). They also make modules for phone and CATV / SAT protection; they have widespread availability as well.
Here is a link to this topic last year:
»Whole House Surge Protectors
Here is a good guide:
»lit.powerware.com/ll_download.as···0607.pdf
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