dc amps vs ac amps

[irving2008]

ok thanks guys, so Irving where i have used 15a wire here for all my supply wires for my fuse's, i need to upgrade the 1 main wire feeding each fuse to 50% of what my expected maximum could be.

So in that case x3 4.2a drivers could ask for 12.6a down that one "supply" line, so adding 50% i need to upgrade that supply line to a 18.9a wire?

Am i right on this? or do i need to expect my maximum to be what the PSU is giving out, so 14a i would need to use 21a wire, please see the pic to understand more what i mean.

Thanks,
CM

CM,

Do not daisy-chain the fuses back to the PSU, wire them individually back as per the diagram below....

The power supply won't be able to supply more current than its maximum rating. depending on the design of the supply it will either go into current limit or will blow a fuse :)