I am interested in installing a whole house residential surge protector. I don't have enough room in my main panel inside my house. I am thinking of buying one of these uints and installing somewhere near the main 125 amp breaker next to the electrical meter, since it is about 30 feet from the main panel inside and I hear it is best to install closest from the mains.
What items would I need to install (Example: weatherproof breaker box, additional breakers, wire guage, etc..)?
How would I wire to the mains?
Whole House Surge Protector
Best Answer
You'll have to install it in what you put in for a replacement subpanel, unless you want to do concrete work
Here's the rub -- that meter-main of yours is basically a boat anchor. You can't realistically replace it (conduits set into concrete act as a practical bar to that even if you got all your other ducks in the row with the utility pulling power, getting the permit needed, and finding a replacement that'd fit the space available), and you can't expand from it either as it only has room for that one main breaker, never mind having to screw around with the concrete just to get at a usable knockout.
The good news is that installing the surge protector into the subpanel will still work well enough -- it just needs to be near the breaker feeding it, and that breaker should be as close to the primary (would say "main" but that's not right in a setup like yours) set of bussing as possible.
If you're up for chiseling out concrete (carefully!)
In order to install the SPD at the meter-main, you'll have to:
(And this is why I recommend installing the surge protector into the new subpanel -- it's far easier that way.)