CAMBRIDGE Qt 100 Installation And Operation Manual - page 9
Q t 1 0 0 I N S T A L L A T I O N & O P E R A T I O N S G U I D E
9
Custom Cabling Guidelines
For system compliance, follow these guidelines if custom cables are
required:
1.
Use solid conductor 24 AWG CAT cable that meets local code
requirements.
2.
If the system is installed in a return air plenum, the cable must be
plenum rated.
3.
Shielding is not required. Unshielded twisted pair (UTP) cable is
acceptable.
4.
Snagless boots are not required.
5.
RJ-45 plugs must use the “bent 3-tine” RJ 45 plugs intended for
use with solid core CAT wire. Three tine plugs can be purchased
at a hardware store and from most CAT cable suppliers. DO NOT
USE the “aligned two-tine” type intended for stranded wire, as
they provide improper contact and may yield intermittent system
operation. The diagram below shows the cross section view of
both types.
6.
Field test each cable after fabrication with the RJ-45 connectors
(before final installation), using a standard network LAN cable
tester, to check for continuity, shorts, and 1:1 (straight through)
connection.
CORRECT
RJ-45 connector
with bent type
INCORRECT
RJ-45 connector
with aligned type