Re: Wiring a rack based distro.
Hi Mark-
Eh, sort of. Directly connected to the hot bus bars in a distro (or your home breaker box) are the over-current protection devices (Code-speak for fuse or circuit breaker), and the smaller wire that runs to an outlet connects to that device. They don't "see" anything... but if you draw more than 80% of rated trip current for an extended period, they will trip. If you have multiples of such circuits connected to a 100 amp service, it is possible that you will trip its breaker/blow fuses.
You're screwed if you really need to power a rig that draws that much current in a venue that small/unprepared/clueless.
It's to your benefit to package your gear so that it deploys quickly in the ways you most often use it. If you're working mostly in venues with wall outlets for power, you really can skip buying "real" power distribution for the moment. If you have clients/venues that you want to keep servicing in spite of their electrical service, you'll need to figure out how to accommodate it should you move into your own distribution for your other gigs. Advancing with a phone call or 2 is good, and a personal visit is even better...
How much power do you need? How many amp racks, with how many of what amplifiers? How hard do you run your rig(s)?