I am a systems administrator by trade. Though I have done a few wiring jobs, this is not a task that I claim to be a professional at, either by training or experience.
However, ethernet wiring isn't something that I've ever thought of as difficult. There is a handful of best-practices, and bad-practices. You watch out for those, and a basic wiring job should be smooth and successful.
Recently, my employer hired a contractor to do the wiring for a new branch. This contractor did a couple things that were high on my "do not do" list. Before I bring these items to my employer's attention, I'd like to have some formal specs or quotes from certified specialists regarding these items. Possibly I'm wrong, and they're not a problem at all. Please weigh in.
All cable and components are CAT6 rated, and the drops should not need anything beyond 1-gigabit + PoE.
- For many of the drops, he left 1" or more space between the plenum and the jack. The pairs are mostly twisted up to the jacks, but sometimes they are untwisted further than is necessary. My concern is signal loss. I would like information to back that up.
- Most of the drops do not have wall-plates to their jacks. My concern is that it will allow the jacks to be moved around, possibly degrading the jack's contact with the drop cables.
- For many of the drops, instead of a straight-run from the network stack to the destination, he terminated in a jack above the ceiling, then used a patch cable to link to another run, and repeated at the destination. So, many runs, there are actually three separate lengths of box cable connected by a pair of patch cables.
My first concern is signal loss. My second concern is that, with time, environmental factors will degrade the quality of the connection between the jacks and the patch cables.
Again, I'm looking for written specs that support my belief that these are bad practices for wiring. Although I appreciate the anecdotal support, that is not something that I can bring to my employer.
If you feel that I am wrong about any of these concerns, I would appreciate your saying so, and backing it up with specs that support you. I am open to being wrong.