Installation UL Power-limited Wiring Requirements42 NFS-640 Installation Manual P/N 51332:B1 12/01/20033.6 UL Power-limited Wiring RequirementsPower-limited and nonpower-limited circuit wiring must remain separated in the cabinet. Allpower-limited circuit wiring must remain at least 0.25 inches (6.35 mm) from any nonpower-limited circuit wiring. All power-limited and nonpower-limited circuit wiring must enter and exitthe cabinet through different knockout and or conduits. To maintain separation, group non-powerlimited modules together, i.e., group modules on the same side of the enclosure or in separate rows.Figure 20 shows one configuration that meets these UL requirements. The first two rows ofmodules are configured with at least a 0.25 inch (6.35 mm) separation between power-limited andnonpower-limited wiring; AC and battery wiring is routed away from power-limited wiring.Figure 20 Typical Wiring for UL Power-limited Wiring RequirementsNote: AC and battery wiring are not power-limited. Maintain at least 0.25 inches (6.35 mm)between power-limited and non power-limited circuit wiring. Install tie wraps and adhesive squaresto secure the wiring. Use a power-limited source for relay output on terminals TB8 – TB11.3.6.1 Labeling Modules and CircuitsAt the time of installation, each nonpower-limited circuit connected to ACM-8R, ARM-4, CRM-4RK, CRE-4, and LDM-R32 modules must be identified in the space provided on the cabinet doorlabel when connected to a non-power-limited source of power.The label lists all compatible power-limited modules and circuits; also see Figure 3 at the start ofthis manual.The following devices are power-limited only when connected to power-limited sources: ARM-4,CRM-4RK, CRE-4, LDM-R32. When one of these devices is connected to a non-power-limitedsource, the power-limited marking must be removed.Power-limited CircuitsPower-limitedcircuitsNonpower-limitedcircuitsnfs640-pwrlmtwir.cdrTo cabinet-mounted battery
