I'm using 23AWG Cat-6 for everything. Not all Cat-6 is 23AWG, much of it is 24, so look for 23AWG when you buy it. It can handle over 1 amp if you do PoE over it, so I think it's sufficient for most things. The only thing I'm running thicker wire on is door strikes if I put those in.
Monoprice has 1000ft spools of the Cat-6 I'm using for $77 each. That's about 1/3 the price of anywhere else.
Monoprice has 1000ft spools of the Cat-6 I'm using for $77 each. That's about 1/3 the price of anywhere else.