Control Panel Wiring Overview. Siemens FS-250

FS-250 Installation and Operation Manual

Devices that may be satisfactorily used with the control panel are shown in the compatible device listing in Appendix B.

Wire reference data are included in Appendix A.

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 FS-250 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 bottom left 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 top and 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 preceding page 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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