michael scanlon
Member
- Location
- Massachusetts
Can telephone, data, television, and CCTV cable be run in the same conduit? I know you may not want to, but is it allowed by the NEC?
Low voltage cable in the same conduit?!?
- Thread starter michael scanlon
- Start date
- Status
Re: Low voltage cable in the same conduit?!?
Michael,
Yes, they can be combined in one raceway if they all have insulation for the highest voltage see 620.36 Different Systems in One Raceway or Traveling Cable. for more information. Also you need to shield the wires so that they do not interfere with each other. This is not a code requirement.
[ July 10, 2003, 10:07 PM: Message edited by: gregory ]
Michael,
Yes, they can be combined in one raceway if they all have insulation for the highest voltage see 620.36 Different Systems in One Raceway or Traveling Cable. for more information. Also you need to shield the wires so that they do not interfere with each other. This is not a code requirement.
[ July 10, 2003, 10:07 PM: Message edited by: gregory ]
pierre
Senior Member
- Location
- Westchester County, New York
Re: Low voltage cable in the same conduit?!?
Hello Michael
There are very specific rules in Art 725, and in Chapter 8.
Be careful when reading 300.3(C)(1)!
Pierre
Hello Michael
There are very specific rules in Art 725, and in Chapter 8.
Be careful when reading 300.3(C)(1)!
Pierre
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Low voltage cable in the same conduit?!?
Gregory, although 300.3(C)(1) would seem to allow low voltage and power in the same conduit, there is a FPN that everyone misses referring to 725.54. Please review section 90.3 for the code arrangement. It is assumed when you read the NEC you understand 90.3.
So the answer probably they can be run in the same conduit. You'll also need to review art 800, 810, 820 and 725.
Or get the recently published Mike Holts Understanding Low Voltage and Limited Energy...
Gregory, although 300.3(C)(1) would seem to allow low voltage and power in the same conduit, there is a FPN that everyone misses referring to 725.54. Please review section 90.3 for the code arrangement. It is assumed when you read the NEC you understand 90.3.
So the answer probably they can be run in the same conduit. You'll also need to review art 800, 810, 820 and 725.
Or get the recently published Mike Holts Understanding Low Voltage and Limited Energy...
pierre
Senior Member
- Location
- Westchester County, New York
Re: Low voltage cable in the same conduit?!?
Tom
we are on the same wavelength here, Thanks
.
Pierre
Tom
we are on the same wavelength here, Thanks
.Pierre
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Low voltage cable in the same conduit?!?
Pierre, a point that Mike Holt makes is the code does not define Low Voltage. Its terms are limited energy and class 1, 2, 3 power limited, etc. But low voltage is the industry jargon we all use.
Pierre, a point that Mike Holt makes is the code does not define Low Voltage. Its terms are limited energy and class 1, 2, 3 power limited, etc. But low voltage is the industry jargon we all use.
pierre
Senior Member
- Location
- Westchester County, New York
Re: Low voltage cable in the same conduit?!?
Tom
Like Romex, BX, and sub panel to name a few, 'Low Voltage' is a common term (slang) to hear. The problem is, different parts of the industry use different voltages as low voltage. Depending on who one talks to, low voltage could be 7140v, 120v, or 12v, just to name a few. I have Mike's new book, and I like it for the same reasons I like his other books. Noel Williams also has written a very good book on 'Limited Energy Systems'.
Articles 411, 504, 640, 720, 725, chapter 8 and other parts of the code are what I call 'lonely' parts.
Pierre
Tom
Like Romex, BX, and sub panel to name a few, 'Low Voltage' is a common term (slang) to hear. The problem is, different parts of the industry use different voltages as low voltage. Depending on who one talks to, low voltage could be 7140v, 120v, or 12v, just to name a few. I have Mike's new book, and I like it for the same reasons I like his other books. Noel Williams also has written a very good book on 'Limited Energy Systems'.
Articles 411, 504, 640, 720, 725, chapter 8 and other parts of the code are what I call 'lonely' parts.
Pierre
- Status