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Never attach anything to lightning protection systems. All outdoor antennas should be grounded per NEC.

Fiber is the best option for that distance and the likelihood the buildings are on separate electrical services with different grounds. Fiber not only goes the distance, is more immune to environmental issues but also maintains electrical isolation. Oh, it's fast also...

Listing equipment is helpful since it moves the conversation out of speculation and into facts. Thanks! The AMX equipment you listed is using a variation on HDBaseT, an industry "standard" that provides for 330' over a single cable. Apparently AMX has had some difficulty with this technology...

I'm sorry IHeartLowVoltage DID mention HDMI over Ethernet in the last sentence. I still doubt this is an accurate description of the technology. The easiest way to tell is if the "transmitters and receivers" have an Ethernet switch between them. If so they are HDMI over Ethernet.

Try temporarily replacing an existing cable with a known good premade and see if the problem is resolved." Yes. This is a good way to troubleshoot. "HDMI over Ethernet (or any data over Ethernet) is just plain Ethernet." IHeartLowVoltage never said it was HDMI over Ethernet. Instead...

Most of the orange pairs I see are cross connect wiring.

Did you look at 3M Scotchlok Self Stripping Dropwire Connector 557TG2 on page 3 of this document?

Sounds good. I agree on the 66 on the feed side. Of course the cable guy will need to remember to pull the bridging clip to avoid backfeeding the telco line. Good luck with that... Whatever you do if the units are already wired with cat5e to a decent patch panel don't tear it up. That...

I had a nice post that had links to tables that would help solve your problem. Unfortunately that post was deleted by forum admins at the request of a drive-by poster. Sorry I don't have the time or inclination right now to find the links again but searching on cctv volt drop should answer your...

Since IP is the coming technology and you can run analog (with baluns) over twisted pair I'd go with cat5e. Shielding is not necessary.

Fiber. If you are going to go to the trouble of digging a trench run 1 or 2 1" conduits between the buildings.

isn't all RG59 cable 18/2?" - NO

Do you have a voltmeter? Can you post links to the specs for the camera and power supply?

As long as all the cameras are on the same building AND below roof level as the rest of the local network no additional grounding should be required or needed. Do yourself a favor and get a real POE switch or injectors that are at least IEEE 802.3af compliant. This should make sure power on the...

As long as you don't deform the cable anything will work.

Yep, if there are already pipes and such secured to the bottom of the joists there is little reason not to put your cables there also. I'd bang a staple in each joist but not zip tie all of them until you are done running cables.

In residential you usually don't want to attach anything to the top/bottom of joists since it can be damaged or someone might want to drywall over it later. The usual practice is to bore a hole large enough for all cables (+15%) at least 1" in from the edge. Snap a chalk line and use a square so...

Since you only need to go though a 8" wall I would get some 3' cables and cut the non-computer end off. Mount a metal utility box over the hole in the wall then poke all the cut cable ends through the wall and into the box. Prep the cut cable ends and solder them to panel (bulkhead) style...

used plenum cable and used the ventilation vents as a way" Don't do that! You cannot run any sort of wiring not related to HVAC in HVAC ductwork. I suppose your house is 2 stories with a basement. If so you wire the 1st floor from the basement and the 2nd floor from the attic. Run your wires...

1 pair, 2 pair, 4 pair, 50 pair or xxx pair Cat5e will all have the same performance characteristics. That is what the specification is for... Be sure the total length stays within spec for networking and POE and it should be fine as long as the cable, parts and workmanship are good.