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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 end-on view of both types.

6. Field test each cable after fabrication with the RJ-45 connectors

(before nal installation), using a standard network LAN cable

tester, to check for continuity, shorts, and 1:1 (straight through)

connection.

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CAMBRIDGE QT Guida di Installazione Pagina 13