Conductors thru same hole in stud or plate
- Thread starter augie47
- Start date
- Status
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Assuming a dwelling with a 120/240 service and the 24V T-stat wire/cable is rated 300V, I believe it is okay.
Too lazy to look up comm. cables right now.
Too lazy to look up comm. cables right now.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Imo, using the same hole does not carry the same requirements as using the same raceway or box. There is no issue with running them thru the same hole. You could run telephone and NM in the same bored hole.
bphgravity
Senior Member
- Location
- Florida
725.136(I)(1) and 800.133(A)(2) Exception No. 1
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
And as stated earlier non of this pertains to cables run thru bored holes. You agree?
- Location
- Bremerton, Washington
NM cable is a chapter 3 wiring method, same as rigid conduit. you would agree that thermostat wire can run alongside rigid conduit, so if you accept that, then no issues with NM, or MC, or AC etc
gadfly56
Senior Member
- Location
- New Jersey
- Occupation
- Professional Engineer, Fire & Life Safety
The thermostat is a Class 2 or 3 circuit, and has to be separated from Class 1 power or lighting by 2 inches, IIRC.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Where? Inside conduit and JB's . Where does it say in all situations? I remember years ago inspectors were calling that and then they realized that it is compliant as tghey are separate wiring methods.
- Location
- Illinois
- Occupation
- retired electrician
Why would that not apply to bored holes ? (ignoring the IIRC point for the moment)
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Reverse question: Why would it?
Perhaps I'm misreading but my thought was 725,136(I) required a 2" separation unless: (1)
"cables were non-metallic sheathed cables (parphrasing) ".
It doesn't say where the 2" would not apply so would (1) not allow you to pull sheathed cables thru holes ?
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
I am not totally clear on your question. Lemme somewhat change around the wording in 725.36(I) and highlight.
(I) Other Applications. For other applications, conductors
of Class 2 and Class 3 circuits shall be separated by at least
50 mm (2 in.) from conductors of any electric light, power,
Class 1 non–power-limited fire alarm or medium power
network-powered broadband communications circuits unless
one of the following conditions is met:
(1) Either
(a) all of the electric light, power, Class 1, non–
power-limited fire alarm and medium-power networkpowered
broadband communications circuit conductors are in a raceway or
in metal-sheathed, metal-clad, non–metallic-sheathed, or Type UF cables.
or
(b) all of the Class 2 and Class 3 circuit conductors
are in a raceway or in metal-sheathed, metal-clad, non–
metallic-sheathed, or Type UF cables.
Jumper,
May be a senior moment..there are more of them lately
I read that and thought I understood it. My only question arose when Dennis questioned that applying to bored hole (if, again, I read his post correctly) and I could not see why it would not apply (to bored holes)
May be a senior moment..there are more of them lately
I read that and thought I understood it. My only question arose when Dennis questioned that applying to bored hole (if, again, I read his post correctly) and I could not see why it would not apply (to bored holes)
gadfly56
Senior Member
- Location
- New Jersey
- Occupation
- Professional Engineer, Fire & Life Safety
OK, looks like I didn't recall enough :slaphead:.
- Location
- Bremerton, Washington
That's only inside a junction box. There are many graphics from mike holt showing a t stat/cat 5 cable running thru the same bored hole as NM and AC.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
That sections allows nm cable and class 2 wiring in the same raceway if they are in a sheathed cable. If it is allowed in a raceway then why in the world would it not be allowed thru a bored hole
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Once the conductors are installed in a cable then most of 725.136 does not apply. I believe that section refers to conductors run in the same cable or in a raceway not cables
gadfly56
Senior Member
- Location
- New Jersey
- Occupation
- Professional Engineer, Fire & Life Safety
"Upon further review, the referee has reversed the decision."
- Location
- Bremerton, Washington
Separation is required for conductors in a box or raceway, not a cable next to a chapter 3 wiring method
- Status