Bazzospain

So I've just upgraded my old Ermet dvr to a Hikvision one, it has 16 bnc connections, all being used, and is capable of 8 IP cams.. I already have 5 Hikvision ip cams in storage, which I undersrand will need a single network cable to each one. (I run 2 bnc cams and power over a single network cable normally) My question is.. what's the best way to power these cameras, do i need to run a separate power cable to each cam?.. not very convenient as they are spread out over 100m or so. And what's best power supply to use? Thanks in advance.

Great.. I've already bought a normal switch.. grrrr never mind, best don't right... thanks for the advice.

Not a professional, but avid fan of cctv after 1st catching a thief trying to break into my pride and joy, and then years later saving me from a corporate manslaughter charge after one of my staff got killed at work.