Re: Custom power distribution
 

The globe pulls ~21.6a at stall

Re: Custom power distribution
 

When I said 30 amps, I meant 30 amps each.
Also I agree, a properly sized circuit breaker is based solely on the wire size or maximum power of any device on that branch, whichever is lower. Example, if your wire can handle ten amps but your DC DC converter can only handle one and will fry if overloaded, you should use a breaker sized for the converter. But if your wire rated for ten amps is used with victors and motors that can handle 100, you should use breakers sized for the wire.

Re: Custom power distribution
 

Neil,
The block that Andrew references is similar to the type used on FRC robots prior to the PD. It uses the same breaker size as the 30, 20 amp breakers that are legal on FRC robots. What is better is that the power distro inside the block is sufficient to keep losses at a minimum. The terminal block wired as you show, drops voltage across each wire and connection from left to right in your photo. You can help things if you move the input to the center of the terminal strip instead of the end. That splits the load equally.
I really recommend another breaker or fuse near to the battery. It should be sized such that a dead short on the battery would trip the fuse/breaker before the battery is damaged. The limit on the battery you reference is the current that the terminals can handle. I would shoot for 100 amps max. Anything more than that is likely to cause the terminals to fail.