Wireing multi 12v constant for power

What do most of you do when wireing multi wires that need to be powered. I got one install coming up that goifn to need about 6 relays. How safe is it to run the relay power wires into "one" wire and runign that wire to a power source. Of course each realy will be fused. Think that be a lot easier in stead or running each of those wires to be powered.

Just to clarify, you wish to install one primary power wire of the appropiate guage from the engine bay, into the interior cabin? From there, you wish to branch off with smaller guage wire leading to each relay? If that is the case, then please do ensure you fuse that primary wire according to the max load the circuit will draw down upon. And of course you will fuse each relay appropiately according to their current limits. Regards EVIL Teken . . .