Non limited power circuits low volts

[Twoskinsoneman]

Where would I find the limitations of low voltage power circuits that are non limited. An example would be a 12vdc battery that is kept charged by a power supply. The battery is an unregulated source of power. Can I run these wires in the same conduit as a branch circuit? Does it make any difference is both wires are the same THWN-2?

Thanks

 

[Twoskinsoneman]

I guess a more specific question is this? How do you classify a circuit that is neither class 1,2 or 3.
If I read correctly to be class one you have to meet the current restrictions in 725.41 (A) 2.
If I just have a big old 24vdc battery capable of producing hundreds of amps I don't believe it can be classified as either class...
Help me understand.

 

[Twoskinsoneman]

Got a lotta smart guys on this forum... No thoughts?

 

[LarryFine]

I have a thought: you need to provide OCP on the output cables within their 310.16 ratings.

 

[nakulak]

if it doesn't meet class 1, 2 or 3, see article 720

other articles may apply

(what is the ckt for ?)

 

[Twoskinsoneman]

I have a thought: you need to provide OCP on the output cables within their 310.16 ratings.

Yes for sure. A battery can put out some real current if shorted...or go boom

 

[LarryFine]

Yes for sure. A battery can put out some real current if shorted...or go boom

You ever short out a simple 9v battery? It's scary how hot they can get after a while.

 

[Twoskinsoneman]

if it doesn't meet class 1, 2 or 3, see article 720

other articles may apply

(what is the ckt for ?)

It's for a 12vdc pump water pump. What do you say. Can the 12vdc circuit run in the same raceway with a branch ciruit?

 

[nakulak]

720 references 480

480.3 - code shall apply

I believe that as long as the wiring is rated for the max voltage of other conductors in pipe and done in a legit. chap 3 wiring method then it complies

(jmsho)