Fire-Lite MS-9050UDC Addressable Fire Alarm Control Panel - Manual (Page 31)

MS-9050 Series Manual — P/N 52413:G 4/14/2014 31
UL Power-limited Wiring Requirements Installation
2.6 UL Power-limited Wiring Requirements
Power-limited and nonpower-limited circuit wiring must remain separated in the cabinet. All
power-limited circuit wiring must remain at least 0.25” (6.35 mm) away from any nonpower-lim-
ited circuit wiring and nonpower-limited circuit wiring must enter and exit the cabinet through dif-
ferent knockouts and/or conduits. If installing an optional ANN-LC, ensure that the ground for the
AC mains is installed first, closest to the backbox. A typical wiring diagram for the FACP is shown
below.
TB1
J1
Figure 2.7 Typical UL Power-limited Wiring Requirements
Power-limited Circuits (Class 2)
Power-limited
Circuits (Class 2)
Nonpower-limited Circuits (Class 1)
Nonpower-
limited, (Class 1)
supervised
Telephone
Circuit
AC Power
Hot
Neutral
Ground
9
0
50
ud
ul
pwr
3
.w
mf
To Batteries
(nonpower-limited,
Class 1, supervised)
maintain minimum 0.25” between power-
limited and nonpower-limited circuits wiring
Ground Stud
Transformer
Wires
(nonpower-
limited,
supervised)
4XTMF
ANN-SEC
Power-limited
Circuits
(Class 2)
dashed lines
represent wiring
behind PCB
Power-limited
Circuits
(Class 2)
Nonpower-
limited,
supervised
Fiber Circuit