how about elaborating on these claims
Firstly, because I ran into that problem. Secondly, I've been an Industrial electronics technician for the last 38 years. An extremely long voltage run has a higher resistance. It requires more current. If the IR cut shuts off on that cam, it causes a surge and will take out led's, cut filter coils, etc on the other cameras. Matter of fact, I put a power supply big enough to power 4 cams 2 weeks ago. It wasn't long before it burned out 2 ir cut coils and 2 led boards on the cams that were closest to the power supply. Then it dawned on me what was happening. I put a separate power supply on each cam and the problem is now gone.
Without getting into a p!ssing contest about qualifications , I have a few issues with what you have said. I'll take them point by point.
* " an extremely long voltage run has a higher resistance" and hence a higher voltage drop over the length of the cable. This results in under voltage at the load (camera). This will not (in itself) cause any damage to the camera or leds.
* " it requires more current " There are only two ways to increase current to the load (camera). You can either decrease the load seen by the power supply or you can increase the voltage presented to the load. Power supply current is not something you simply turn up or down.
* " it causes a surge ". What are we talking about here? A momentary increase in current caused by a sudden decrease in load which will in turn cause a increase in voltage drop over the length of the power feed.
The problems you describe would only ever present themselves if you used a SINGLE power feed supplying all cameras in a daisy-chain configuration AND used an UNREGULATED power supply. This is something that I would hope no industrial electronics technician would ever comtemplate doing.