Terminating security sensors on 66 blocks

[Photon]

There is nothing different about using 66 blocks for security contacts. You're right, telcos have been using these forever (and I have installed my fair share of them). I have seen 66 blocks installed in very humid environments, with multiple T1 circuits punched down to them, without any problems.

reeltoreel, what are you basing your statements on regarding reliability after a few years of service? I have a few 66 blocks in our current office that have been installed for 9 years, with numerous T1s on each, and have never experienced any sort of issue with the wiring.

66 blocks were never intended to be used with CLOSED LOOP burg circuits. All other circuits are fine. Closed loop splices/connections must be SOLID ( screw term, BB's, solder) and sometimes these methods can fail. WHY would anyone WANT to put burg loops on a 66?? All loops should be in a panel, labeled and secure behind a locked door. In 30 years installing alarms I have NEVER seen or heard of any dealer using 66 for BURG. Why even introduce the possibility of a swinger by using 66. Maybe I'm missing something? Again.... this only applies to burg loops.

The Siemon catalog states their "S66M1-50 66-block is fully compatible with all industry standard accessories while providing a proven, economical solution for terminating high performance UTP cable." I don't see any exclusions for closed loop security circuits. They may not be seen in a lot of security installations because their specs are so much better than required; why pay for quality you don't need. The building I work in is about ten years old, and every circuit in the security system is terminated on a 66-block. They are all on panels, nicely labeled, and secure behind a locked door. We never had an issue with those terminations that I've heard about. They make a fast, reliable, gas-tight connection when used with 22-26 ga solid wire. If you prefer to use stranded wire, don't use the 66-blocks.