Table of Contents
Advertisement
3.4
Wiring Specifications
Induced noise (transfer of electrical energy from one wire to another) can interfere with
telephone communication or cause false alarms. To avoid induced noise, follow these
guidelines:
•
Isolate input wiring from high current output and power wiring. Do not pull one multi-
conductor cable for the entire panel. Instead, separate the wiring as follows:
•
Do not pull wires from different groups through the same conduit. If you must run them
together, do so for as short a distance as possible or use shielded cable. Connect the shield
to earth ground at the panel. You must route high and low voltages separately.
•
Route the wiring around the inside perimeter of the cabinet. It should not cross the circuit
board where it could induce noise into the sensitive microelectronics or pick up unwanted
RF noise from the high speed circuits. See Figure 3-1 for an example.
•
High frequency noise, such as that produced by the inductive reactance of a speaker or
bell, can also be reduced by running the wire through ferrite shield beads or by wrapping it
around a ferrite toroid.
151450
High voltage
SLC loops
Notification circuits
Relay circuits
Figure 3-1 Wire Routing Example
Before You Begin Installing
AC power Terminals
Phone line circuits
NAC1 through NAC2
SBUS Wiring
1/4" spacing must
be maintained
between power
limited and Non-
power limited
wiring
3-3
Advertisement
Table of Contents
