Control Panel Wiring Overview; Wiring Entering Enclosure; Install Wiring - Siemens FC901-U3 Installation, Operation And Maintenance Manual

Control Panel Wiring Overview

In compliance with NEC Article 760 and UL 864, all power limited fire protective signaling
conductors must be separated a minimum of 1/4 inch from all of the following wiring located
within a control panel:
Electric light
Power
Class 1 or non-power limited fire protective signaling conductors
To meet these requirements, the following guidelines must be observed when installing
modules and wiring to this control panel.
When installing power limited field wiring, the installer must comply with NEC article 760, which
states:
The fire alarm power-limited circuits are installed using Types FPL, FPLR, FPLP or
permitted substitute cable, provided these power-limited cable conductors extending
beyond the jacket are separated by a minimum of 0.25 in. (6.35 mm) or by a nonconductive
sleeve or nonconductive barrier from all other conductors.
If energy limited cable or equivalent is not used within the FC901 enclosure, then the following
guidelines do not apply. In that case, be sure to follow standard wiring practices.

Wiring Entering Enclosure

Non-Power Limited Wiring - Wiring entering the enclosure from the right side of the backbox is
considered non-power limited wiring. Wiring must be in the shortest route and must not overlap
any other wiring.
Power Limited Wiring - Wiring entering the enclosure from the left side of the backbox is
considered power limited. Wiring must be in the shortest route and must not overlap any other
wiring.

Install Wiring

The primary mains input must have a separate or dedicated circuit breaker. Wire in
accordance with local codes and NEC 760.
Remove the knockouts in the backbox for the entry of field wiring. (Refer to Enclosure
Mounting Pictures on page 26 and Wiring Separation Diagram on next page for the location of
knockouts.)
Pull all field wiring into the backbox. Do not dress the wiring until the location of all the
equipment is known.
Install the wiring from the external power source to the approximate location of the power
supply.
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