Julius793

can thermostat and line voltage go through the same hole/comduit?

wildleg

depends. sometimes yes. mostly no.

__________________
As President Roosevelt said: "We have nothing to fear but fear itself. And Chuck Norris. And 滿口胡言. And Grabthar's hammer. And Gort. and 江南 Style. and rotting in the street and Zombies . . . and Wayne Griffen "

Julius793

ok when yes when no? if its fed from a class 2 transformer what would the answer be?

Shockdoc

Same KO ? I believe yes. Same conduit? conductors need to be rated 600volts.

__________________
All these liberal laws has turned me into a right wingnut..

wildleg

maybe if you would provide more information it would be easier to answer you. hole in what ? control panel ? stud ? enclosure ? what voltage is the power ? is the thermostadt associated with the power wiring ? what type of wiring/cable is used for the thermostadt ? there are many variables.

__________________
As President Roosevelt said: "We have nothing to fear but fear itself. And Chuck Norris. And 滿口胡言. And Grabthar's hammer. And Gort. and 江南 Style. and rotting in the street and Zombies . . . and Wayne Griffen "

Nebelectrician

Agree with wild leg, many variables. Personally I keep different class circuits separate

Julius793

1. holes in studs
2. 24v
3. not in any way
4. class 2

wildleg

is it 300v thermostadt cable ? is the power wiring over 300v ? is it one hole or a whole line of holes where the power and class 2 cable have no separation ? what about the conduit you mentioned before ?

__________________
As President Roosevelt said: "We have nothing to fear but fear itself. And Chuck Norris. And 滿口胡言. And Grabthar's hammer. And Gort. and 江南 Style. and rotting in the street and Zombies . . . and Wayne Griffen "

TLinSTL

Within the last few months, 3 different jobs I've come on to towards the end have been called out by the inspector for running thermostat wire through the same hole in the studs as romex. By time I had gotten on the job and told the other guys, it was really too late to fix and they just figured the inspector wouldn't care. In 2 of the 3, it was the cause of the failure. Even holes up in soffits through the fire drywall require separate holes.

Amish Electrician

I'd love to see the citation.

Even taking Article 725 (I think) at it's most imaginative scope, it only addresses running Class 2 wires within the same wiring method - and a thermostat cable next to a Romex cable is still outside the Romex.

The 'mixing circuits' debate has plenty of life left in it, but I just can't see any ban on using the same hole.

NacBooster29

God make sure there's no plumbing in the same bay too. The electrons love to jump out of romex everyone knows that.

acrwc10

WTF (where the fu--) did your inspector get that from? That makes no sense at all. The NM is insulated and jacketed, no leaking electrons to magically jump onto the unsuspecting (also insulated and jacketed) thermostat wire. Maybe you need to use the good NM cable that doesn't leak, then you will pass more inspections.

B4T

I never heard of bell wire and NM cable in the same hole through a stud would lead to a violation.. that is crazy talk..

__________________
There comes a time when people who volunteer their service need to step back and see if it is better for them to retire. A red flag is when they become "cranky" and lose all sense of reality by making decisions that really don't make any sense..

user4818

CABLES can share a knockout while CONDUCTORS cannot.

Magnettica

Code section please.


The section the OP should be looking at is article 725. I believe it was one of the questions on the NJ licensing exam too. I looked just now but couldn't find it. I have it highlighted in my 08' NEC but that's out in the truck and i'm watching the Devils in OT so I'm not leaving this chair.

user4818

I hardly ever read the code book anymore so I have no idea, but it's in there.

HARRY304E

300.2 Limitations.
(A) Voltage. Wiring methods specified in Chapter 3 shall
be used for 600 volts, nominal, or less where not specifically
limited in some section of Chapter 3. They shall be
permitted for over 600 volts, nominal, where specifically
permitted elsewhere in this Code.



(C) Conductors of Different Systems.
(1) 600 Volts, Nominal, or Less. Conductors of ac and dc
circuits, rated 600 volts, nominal, or less, shall be permitted
to occupy the same equipment wiring enclosure, cable, or
raceway. All conductors shall have an insulation rating
equal to at least the maximum circuit voltage applied to any
conductor within the enclosure, cable, or raceway.
Informational Note No. 1: See 725.136(A) for Class 2 and
Class 3 circuit conductors.
Informational Note No. 2: See 690.4(B) for photovoltaic
source and output circuits.


725.136 Separation from Electric Light, Power, Class 1,
Non–Power-Limited Fire Alarm Circuit Conductors, and
Medium-Power Network-Powered Broadband Communications
Cables.
(A) General. Cables and conductors of Class 2 and Class 3
circuits shall not be placed in any cable, cable tray, compartment,
enclosure, manhole, outlet box, device box, raceway,
or similar fitting with conductors of electric light,
power, Class 1, non–power-limited fire alarm circuits, and
medium-power network-powered broadband communications
circuits unless permitted by 725.136(B) through (I).

__________________

ES2 Flat Rate , The best $99 I've ever spent ..

HARRY304E

typical.

__________________

ES2 Flat Rate , The best $99 I've ever spent ..

user4818

What's typical? I have most of the important code rules memorized, so it's not like I need to study it.

acrwc10

When I get an inspector that uses that method, I give them a run for their money. There is little room for "I know I read it somewhere" when your tell someone that they need to change something, thus delaying the job and costing money. One local inspector is almost afraid of me now because over the last 3 years everything he has called me on I challenged him on and proved him wrong. Nothing pisses me off more than uneducated inspectors, they are a public hazard by calling BS and missing real safety issues other trades work.