Siemens Industry, Inc.
Building Technologies Division
A6V10328636_en--_c
5
MSE-3 BACKBOX
OUTER DOOR
GROUND WIRE
WIRE: 12AWG
UNUSED STUD
Figure 5
Ground Wire Installation
WIRING
In compliance with NEC Article 760, all power limited fire protective signaling
conductors must be separated a minimum of ¼ 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 noncon-
ductive sleeve or nonconductive barrier from all other conductors.
If energy limited cable or equivalent is not used within the 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 and 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.
