Wiring Specifications - Honeywell ECS Series Installation And Operation Manual

ECS Device Installation
4.4.3

Wiring Specifications

All wiring and devices installed in the system must meet the standards described in National Electrical
Code (NFPA 70), NFPA Standard 72, and Life Safety Code (NFPA 101).
To avoid induced noise (transfer of electrical energy from one wire to another), keep input wiring
isolated from high-current output and power wiring. Avoid pulling one multiconductor cable for the
entire panel.
Instead, separate the wiring as follows:
¼" spacing must be maintained
between each of these circuit types;
as well as between power limited
and non power-limited circuits.
DO NOT pull wires from different groups through the same conduit.
Twisted, shielded wire is recommended for all audio circuits to provide the maximum protection against
EMI and AFI emission and susceptibility.
If using shielded cable, attach the shield to earth ground on the control panel.
For the same reasons, wiring within the cabinet should be routed around the perimeter of the cabinet.
It should not cross the printed circuit board where it could induce noise into the sensitive
microelectronics or pick up unwanted RF noise from the high speed circuits.
High frequency noise, such as that produced by the inductive 2 reactance of a speaker or bell, can
also be reduced by running the wire through ferrite beads or by wrapping it around a ferrite toroid core.
Table 4-1
Input/Output Type: Wiring
Non Power-Limited: AC power, Standby batteries
Power-Limited: SBUS, VBUS
Audio: Speaker
4-15
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