Ul Power-Limited Wiring Requirements - Fire-Lite MS-9050UDC User Manual

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-
limited circuit wiring and nonpower-limited circuit wiring must enter and exit the cabinet through
different knockouts and/or conduits. A typical wiring diagram for the FACP is shown below.
Transformer Wires
(nonpower-limited,
supervised)
AC Power
Hot
Neutral
Ground
46
Power-limited Circuits (Class 2)
4XTMF
Ground Stud
To Batteries
(nonpower-limited,
Class 1
supervised)
Figure 2.7 Typical UL Power-limited Wiring Requirements
maintain minimum 0.25"
between power-limited
and nonpower-limited
circuits wiring
Nonpower-limited Circuits (Class 1)
MS-9050UD Series PN 52413:D 12/15/08
Power-limited Circuits (Class 2)
Nonpower-limited,
(Class 1)
supervised
Telephone Circuit