NFS2-3030 Listing Document — P/N LS10006-051NF-E:F2 5/19/2022 11
1.4 UL Power-Limited Wiring Requirements
Power-limited (Class 2) and non-power-limited circuit wiring must remain separated in the cabinet. The following requirements apply:
• All power-limited circuit wiring must remain 0.25 inches (6.35mm) from non-power-limited circuit wiring.
• All power-limited and non-power-limited circuit wiring must enter and exit the cabinet through different knockouts or conduits.
• If the device connected is only power-limited when connected to a power-limited source, the power limited marking must be removed, and at the
time of installation, each non-power-limited circuit connected to these modules must be identified in the space provided on the cabinet door label.
• If additional knockouts are added to the backbox, proper separation of power-limited and non-power-limited wiring should be maintained.
NOTE: Relays are power-limited only when connected to power-limited sources for the relay outputs.
Non-power-limited circuit
(Assumes relay is connected to a
non-power-limited signal s
ource)
Power-limited
circuits
Loop-
control &
Loop-
expander
modules
NFS2-3030
Side-View
Power-limited
circuits
Separating non-
power-limited and
power limited circuits
within the backbox
with adhesive
squares
amps24cab3wrngside.wmf
3030ULWIRING.wmf
Figure 10 Typical Wiring in a Four-Row backbox
Note: Drawing is not to scale;
proportions and angles are
exaggerated to show wire
placement more clearly.
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