I'm getting ready to wire my garage as part of converting it into an aquarium room (I'll have about 50 or 60 fish tanks in there). This will all be "new work"-- there has been no wiring in the garage until now.
I've been reading up on what I will need, and I understand that I will need circuits with ground fault interrupters (GFCI) on them, both because the codes require this for garages and because I'm going to have a lot of water in mine (comparable to having GFCIs in a bathroom, I guess).
I know that there are two basic kinds of GFCI that I can install. One way is to have each outlet contain a built-in GFCI (that's what I usually see in bathrooms). But there are also circuit breakers for the panel box that have built-in GFCIs. As far as I can see, they do the same thing as having a GFCI on each outlet does.
Here's what I want to know: Is there some advantage to doing it one way or the other? Would it be safer to have GFCI on the breakers in the box, or on each outlet, or does it not matter? Would there be any advantage to using both kinds together?
This setup will have a lot of outlets (maybe about 75). There will be a lot of electrical devices, mainly low-wattage ones like air pumps and aquarium power filters (and some fluorescent and/or LED lights). So it would be cheaper to have the GFCI on the circuit breakers instead of on each outlet (outlets without GFCI are much cheaper than those with it). But if that isn't safe, of course, it's out of the question.