User Manual

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UL Power-limited Wiring Requirements 2. Installation

ACM-8RF PN 50362:C 03/21/01

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" away

from any nonpower-limited circuit wiring. Furthermore, all power-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 ACM-8RF is shown below. In this diagram, relays K1 through K4 are

being used for power-limited circuits and relays K5 through K8 for nonpower-

limited circuits. Different applications may require different conduit

knockouts to be used. Any conduit knockouts may be used provided that the

nonpower-limited wiring remain separated from the power-limited wiring.

Figure 12 Typical Wiring Diagram

Requirements for power-limited and nonpower-limited circuits on the same

ACM-8RF module are as follows:

1. If a mix of power-limited and nonpower- limited circuits are connected

to relays, skip a set of dry contacts to maintain 0.25" spacing between

power-limited and nonpower-limited circuits.

2. If only power-limited or nonpower-limited circuits are being employed,

all relays may be used without skipping any for spacing purposes.

3. Relays K1 through K4 may be used to run all power-limited circuits

while K5 through K8 are being used to run all non-power-limited

circuits.

4. Refer to the Power-limited label located on the FACP door. Make a

notation on the label for each circuit being employed as a Nonpower-

limited circuit. (Refer to the example on the label).

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