sanity check, current distribution
That all looks fine at a basic level but you must bear in mind that a short on any one of the loads will pull a current only limited by the supply and the cable resistance. 



Figure 1. A selection of PTC fuses from LittleFuse.

You should probably protect each socket with a resettable fuse. See LittleFuse PolyFuse Selection Guide for a well written introduction to the topic.