110.12, but for EMS cable

[Dibloafer911]

Hello All!

I'm looking for somewhere in the NEC where it addresses the same information in 110.12, but for energy management cable, which (generally) carries little to zero voltage (in my application at least). I don't think it's in this codebook but I wanted to see if some of you pros could weigh in. If more detail of my specific scenario is requested, I will provide!

Thanks!!

 

[tom baker]

It could be a article 725 class 1,2 or 3 system
These circuits are determined by the power and voltage
What is printed on the cable jacket?
What type of equipment is it connected to
Does it have an RJ45 comnector?

 

[Dibloafer911]

Pic 1
Pic 2

They are not RJ45 cables. Simple building management cable. These are basically thermostat wire. No weather rating that can be seen on the jacket. I've never seen a contractor bring thier BMS cables for the RTU's through the roof in such a ghastly manner. There has to be something in the NEC that calls out for LV cables such as this to be protected from corrosive material and weather. 110 is referencing high voltage, no?

 

[tom baker]

110.2 is approval.
You mention high voltage, is that 120V or ?
I can't open your pictures, the easy way to post a picture is to snip or take a screen shot and post.
Thermostat wiring is an Article 725 Class 2 Remote Control and Power Limited Circuit.
There is an NEC article for this wiring once we determine what it is. Or used for.
Is this running a building management system?

 

[Dibloafer911]

110.2 is approval.

Not sure what you mean here

You mention high voltage, is that 120V or ?

The cable only carries 24v plus some digital closures. It's muticonductor cable for tethering the DOAS unit to their respective hood controllers

I can't open your pictures, the easy way to post a picture is to snip or take a screen shot and post.

This is the spot!! Thank you!!

Thermostat wiring is an Article 725 Class 2 Remote Control and Power Limited Circuit.
There is an NEC article for this wiring once we determine what it is. Or used for.
Is this running a building management system?

It's not 'running' the BMS but it's a part of the BMS system wiring for the hood controllers and DOAS units on the roof

 

[tom baker]

What is DOAS?
This is likely an article 725 application. These circuits are safe from fire and electric shock, and the code is more concerned with the correct type of cable, so the cable does mot contribute toxic gas and smoke in a fire
ThE BMS cable must show a ul listing on the jacket.
If not you should question the qualifications of those who installed it.

 

[ron]

Tom, DOAS is a type of HVAC (dedicated outdoor air system).

Dibloafer911: 110.12 (workmanship) is very difficult to enforce unless there is something prescriptive in the code for the topic, such as conduit being required or not. Workmanship is very subjective otherwise.

Co

 

[tom baker]

The best approach for your issue is to add requirements in the job specs.
However we still don’t know what type of circuit the NEC considers your application