LED cooler door wiring

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Smiley64

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When installing retrofit LED sticks in grocery cooler doors the instructions say connect the low voltage DC from the LED driver to the existing ballast secondary wires that run through the door jams to the existing lamp holders. The lamp holders are to be removed and the LED stick wires connected to the existing ballast secondary wires. This is a UL listed product. The existing wire ways also contain line voltage wires for door heaters and for the next LED driver down the line. Is it allowable to have the low voltage DC and line voltage in the same wire way?
 
Smiley64 said:
When installing retrofit LED sticks in grocery cooler doors the instructions say connect the low voltage DC from the LED driver to the existing ballast secondary wires that run through the door jams to the existing lamp holders. The lamp holders are to be removed and the LED stick wires connected to the existing ballast secondary wires. This is a UL listed product. The existing wire ways also contain line voltage wires for door heaters and for the next LED driver down the line. Is it allowable to have the low voltage DC and line voltage in the same wire way?
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I hope so, we have done literal thousands of them.:cool:


The NEC does not apply inside the cases.
 
smoliey64:
Circuits of different voltage rating up to 600V may be run in the same enclosure (box, cable etc.,), provided the wires are insulated to the maximum voltage rating of any circuit in the same enclosure. So see to it that your DC wires have suitable voltage rating.
 
T.M.Haja Sahib said:
smoliey64:
Circuits of different voltage rating up to 600V may be run in the same enclosure (box, cable etc.,), provided the wires are insulated to the maximum voltage rating of any circuit in the same enclosure. So see to it that your DC wires have suitable voltage rating.
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IF the NEC applied he would be in violation of sections in Article 725.
 
Class 1 circuits can be in the same cable, enclosure or raceway with power supply circuits, only where the equipment powered is functionally associated with the Class 1 circuit.
 
Where it is necessary to install Class 2 or Class 3 circuits inside the same raceway or cable with power or Class 1 circuits, you can reclassify Class 2 or Class 3 circuits. To do so, the conductors must have 600V insulation. Further, you must remove the Class 2 or Class 3 marking on the equipment, and provide overcurrent protection in accordance with 725.23.

OR

You can mix Class 2 and Class 3 conductors with power conductors in boxes or enclosures, if the power circuit conductors are introduced solely to connect to the equipment connected to Class 2 and 3 circuits and you meet certain spacing and voltage requirements.
 
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T.M.Haja Sahib said:
Where it is necessary to install Class 2 or Class 3 circuits inside the same raceway or cable with power or Class 1 circuits, you can reclassify Class 2 or Class 3 circuits. To do so, the conductors must have 600V insulation. Further, you must remove the Class 2 or Class 3 marking on the equipment, and provide overcurrent protection in accordance with 725.23.
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Yes and the the entire formerly class 2 circuit must then be run as class 1. That would be a problem with the exposed wiring inside the case.

I say would as the NEC does not apply inside listed equipment other than the requirements of 110.3(B).
 
T.M.Haja Sahib said:

You can mix Class 2 and Class 3 conductors with power conductors in boxes or enclosures, if the power circuit conductors are introduced solely to connect to the equipment connected to Class 2 and 3 circuits and you meet certain spacing and voltage requirements.
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Yes again, but that is not possible in these cooler door applications.

Lucky it is outside the scope of the NEC.
 
I agree with everyone on this one. IMO, this is one of those situations where a judgement call is called for and where in this case it is time to separate fact from rediculous:),Literal interpretations as written are oft times not to be interpreted for every situation:thumbsup:

dick
 
iwire said:
Yes and the the entire formerly class 2 circuit must then be run as class 1. That would be a problem with the exposed wiring inside the case.
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I suppose your contention of violation of NEC now really hinges on your ''the exposed wiring.......'' in the above statement. But the subject wiring is inside the refrigerator box. How can it be considered 'exposed'?
 
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