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Lutron LQSE-4A5-120-D Manuel D'instructions page 5

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Electrical Code Details
NFPA 70 – National Electrical Code 2017
The following are the Class 2 wiring methods per NEC
• Class 2 circuit conductors in compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be
permitted to be installed with electric light, power, Class 1, non-power-limited fire alarm, and medium-power,
network-powered broadband communications circuits where they are introduced solely to connect equipment
connected to Class 2 circuits, and where 1 or 2 below applies:
The electric light, power, Class 1, non-power-limited fire alarm, and medium-power, network-powered
1.
broadband communications circuit conductors are routed to maintain a minimum of 6 mm (0.25 in)
separation from the conductors and cables of Class 2 circuits
2.
The circuit conductors operate at 150 V~ or less to ground and also comply with one of the following:
a. The Class 2 circuits are installed using Type CL3, CL3R, CL3P or permitted substitute cables, provided
these Class 3 cable conductors extending beyond the jacket are separated by a minimum of 6 mm
(0.25 in) or by a nonconductive sleeve or nonconductive barrier from all other conductors
b. The Class 2 circuit conductors are installed as a Class 1 circuit in accordance with 725.41
Complying with NFPA 70
The following describes how Lutron DIN power modules and panels meet the requirements outlined in
2 and 2a above:
• Circuit conductors operate at 150 V~ or less, as mentioned in 2 above, is applicable since these modules and
panels are rated for 120 V~ operation.
• If using Lutron Cable GRX-CBL-346S-500, it is CL3 rated as called out in 2a above. If using Lutron wiring
harness PDW-QS-x (where x = 4, 5, 8 or 9), these are CM type cables which are considered a permitted
substitute, mentioned in 2a above, per Table 725.154.
• A minimum of 6 mm (0.25 in) of separation between conductors, mentioned in 2a above, can be maintained
due to the spacing and positioning of the terminals where Class 2 and line-voltage connects to the DIN power
modules. Be mindful of wire strip lengths and wire routing to make sure the proper spacing is maintained
between conductors on a single unit or other units in the panel. See picture below:
Line-voltage wiring
Note: Maintain a minimum separation between Class 2 conductors (beyond the jacket) and other conductors.
®
Application Note #670
requirement 725.136 (D) (references to Class 3 eliminated):
®
Low-voltage wiring
Keep conductors extending beyond the
with Class 1 wires
jacket separated by a minimum or 6 mm
(0.25 in) from other conductors.
Secure Class 2 wiring to
mounting tabs
Class 2 wiring
5
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