Was asked to look at this Enterview door entry system ;
1 external speaker/camera
1 door release
4 x internal intercoms
All intercoms ring, have 2 way speech but show a blue screen on video.
I did some research and obtained a copy of the install manual. It advises a voltage test at each intercom, as this is critical. Logically, as all intercoms show a blue screen it's likely to be the camera or wiring from it.
Before carrying out any any physical checks or tests, I thought I would make myself familiar with the cable runs, general wiring and placement of the PSU's etc.
What I found was this, in a cupboard under the stairs, with just a turn button catch on the door. . I'm pretty shocked at the way this has been wired up.
http://imgur.com/a/VUO3m
Being that the premises are a nursery should this electrical work have been notifiable and even if not, what, if any, regulations have been flouted as a lever to get the original installation company to put it right and safe just on the electrical level.
As for the original fault, just tracing out the low voltage wiring they have used much of the existing twisted pair and the installation guide recommends 2 pairs of cat5 for runs up to 10meters, for which at least two handsets look to exceed.
I've refused to do any work on this as do not want to be the last person to, and therefore become responsible for it.
Any comments appreciated
Pete
1 external speaker/camera
1 door release
4 x internal intercoms
All intercoms ring, have 2 way speech but show a blue screen on video.
I did some research and obtained a copy of the install manual. It advises a voltage test at each intercom, as this is critical. Logically, as all intercoms show a blue screen it's likely to be the camera or wiring from it.
Before carrying out any any physical checks or tests, I thought I would make myself familiar with the cable runs, general wiring and placement of the PSU's etc.
What I found was this, in a cupboard under the stairs, with just a turn button catch on the door. . I'm pretty shocked at the way this has been wired up.
http://imgur.com/a/VUO3m
Being that the premises are a nursery should this electrical work have been notifiable and even if not, what, if any, regulations have been flouted as a lever to get the original installation company to put it right and safe just on the electrical level.
As for the original fault, just tracing out the low voltage wiring they have used much of the existing twisted pair and the installation guide recommends 2 pairs of cat5 for runs up to 10meters, for which at least two handsets look to exceed.
I've refused to do any work on this as do not want to be the last person to, and therefore become responsible for it.
Any comments appreciated
Pete