Load Side Switchpack

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mstrlucky74

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Do you guys run the 24V wire from switch pack to occ sensor exposed per does it have to be in conduit per code? Not sure of the 24V is considered Class 1 or 2. I know a lot of times they are right next to the occ sensor but sometimes you'll have a switchpack control multiple sensors this have a longer 24V run. Thanks you.
 

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But if you run any of it under Class 2 rules you cannot choose to share a raceway with power wiring for any other portion of the run.
Whether it is eligible to be considered Class 2 or not does not depend on looking at the voltage or even voltage and current but rather on the UL listing of the part that supplies the power.
 
So a little confusing confusion on my part. Class 2 can be run free air and class 1 can be run with 120v wires. Do I have that correct?
 
GoldDigger said:
But if you run any of it under Class 2 rules you cannot choose to share a raceway with power wiring for any other portion of the run.
Whether it is eligible to be considered Class 2 or not does not depend on looking at the voltage or even voltage and current but rather on the UL listing of the part that supplies the power.
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What do you look for on the UL listed to determine that? Thanks
 
mstrlucky74 said:
What do you look for on the UL listed to determine that? Thanks
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By the letter of the NEC, any Class 2 power source must be clearly marked to show that. Not sure how closely the details of the marking are specified, if at all.
I seem to recall something like "clearly marked".

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GoldDigger said:
By the letter of the NEC, any Class 2 power source must be clearly marked to show that. Not sure how closely the details of the marking are specified, if at all.
I seem to recall something like "clearly marked".

Sent from my XT1585 using Tapatalk
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725.124 Circuit Marking.
The equipment supplying the
circuits shall be durably marked where plainly visible to
indicate each circuit that is a Class 2 or Class 3 circuit
 
GoldDigger said:
By the letter of the NEC, any Class 2 power source must be clearly marked to show that. Not sure how closely the details of the marking are specified, if at all.
I seem to recall something like "clearly marked".

Sent from my XT1585 using Tapatalk
Click to expand...

I attended a Mike Holt seminar, and he said that using a Sharpie would work. :cool:
 
dkidd said:
I attended a Mike Holt seminar, and he said that using a Sharpie would work. :cool:
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I wasn't there, but I think you might be confused. You can run class 2 wiring as class one with all the restrictions, but as stated earlier, ALL the restrictions. Once the decision is made, the entire wiring system from the power source on is considered Class 1. The other requirement is that the Class 2 markings must be removed from the power supply. I believe that is what you are remembering as being OK to use a Sharpie on. since the power supply must be listed and marked, I believe it must be marked by the manufacturer, not the end user. so basically no Sharpie. For the hair splitters here, yes I know the manufacturer could use a Sharpie just don't think the usually would.
 
Strathead said:
I wasn't there, but I think you might be confused. You can run class 2 wiring as class one with all the restrictions, but as stated earlier, ALL the restrictions. Once the decision is made, the entire wiring system from the power source on is considered Class 1. The other requirement is that the Class 2 markings must be removed from the power supply. I believe that is what you are remembering as being OK to use a Sharpie on. since the power supply must be listed and marked, I believe it must be marked by the manufacturer, not the end user. so basically no Sharpie. For the hair splitters here, yes I know the manufacturer could use a Sharpie just don't think the usually would.
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I imagine this exception is where the sharpie comes into play

Exception No.2: Class 2 and Class 3 circuits shall be pennitted to be reclassified and installed as Class 1 circuits if the Class 2 and Class 3 markings required in 725.124 are eliminated and the entire circuit is installed using the wiring methods and materials in accordance with Part II, Class 1 circuits.
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You have to get ride of the class 2 designation on the power supply.
 
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