12 Dec
2018
12 Dec
'18
4:28 p.m.
On 12/12/18 10:51 AM, William Herrin wrote:
The AV lab gets screwed. You're running the coax they need through the noisy electrical riser because you didn't build dedicated comms risers and closets. Naturally nobody checked with them so you don't yet realize they can't do what they need to do with video over IP equipment.
There are double-shield coax solutions for noisy risers. The outer shield is grounded to the conduit, while the inner shield is grounded at the source equipment. One has to be sure that the voltage differential between shields is kept as low as practical, which means paying attention to grounding for the conduit AND equipment.