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| Topic: | CL meaning This thread has 8 replies. Displaying all posts. |
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| Post 1 made on Friday March 10, 2006 at 19:05 |
DIRTE Active Member |
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Is there a reference/dictionary to what the acronyms mean on the jackets of cables for what there intended for? I know that UL means underwriter laboritories and CMR stands for cable multi-use riser but want a definition of each with there intended purpose. Thanks
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| Post 2 made on Friday March 10, 2006 at 19:07 |
QQQ Super Member |
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Go to Belden's web site. You'll have to poke around but I think it's in their main pdf catalog which you can donwload. They have an excellent chart explaining all the different fire ratings.
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| Post 3 made on Friday March 10, 2006 at 21:41 |
Slimfoot Select Member |
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Sir, my concern is not whether God is on our side; my greatest concern is to be on God's side, for God is always right.
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| Post 4 made on Saturday March 11, 2006 at 02:06 |
Mr. Stanley Elite Member |
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CL = Consumer Laboratories ? You mean as in CL3 - CL4 ratings?
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"If it keeps up, man will atrophy all his limbs but the push-button finger."
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| Post 5 made on Saturday March 11, 2006 at 10:08 |
AHEM Select Member |
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| Post 6 made on Saturday March 11, 2006 at 11:12 |
2nd rick Super Member |
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CL-2 is NEC (National Electrical Code) Class 2 low voltage rating, CL-3 is NEC Class 3 rating, which is rated for higher powered circuits than Class 2 or Class 1.
There are different tables for AC vs. DC circuits to determine the maximum voltage rating within each class, and I don't have the figures in front of me. The figure 48 volts stands out in my mind, and this may be the limit for CL-2.
Larry??
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Rick Murphy
Troy, MI |
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| Post 7 made on Saturday March 11, 2006 at 11:46 |
Brentm Ethereal Home Theater |
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Posts: | July 2003
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CL 2/3 Ratings refer ( I think) to burn ratings.
CL2 is rated for horizontial wire runs.
CL3 is rated for horizontail and verticle wire runs.
General installation of wiring, including installation inside of walls, is governed by 725.61(E), the principal features of which, for our purposes, are:
(1) CL2 and CL3 are always permitted;
(2) CL2X ("X" is a residential suffix, signifying a lower grade than plain CL2) or CL3X may be installed in raceways;
(3) CL2X or CL3X, if under 1/4 inch in diameter, may be installed in a 1 or 2 family residential dwelling without a raceway; if nonconcealed, it may also be installed in multifamily dwellings.
So, if a cable isn't marked CL2 or CL3, is it suitable for in-wall installation? It may be. The NEC allows cable of a higher rating to be substituted for a lower rating, and therefore, any of the following may be used: CM, CMP, CMR, CMG, CL2R, CL3R, CL2P, CL3P, PLTC. CMX also may be used where CL2X or CL3X is required.
In a plenum, 725.61(A) governs; CL2P or CL3P are required, and CMP is a permitted substitution.
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Brent McCall
Paid Endorser for;
Ethereal (386) 846-7264 Cell |
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| Post 8 made on Saturday March 11, 2006 at 17:27 |
vwpower44 Super Member |
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Posts: | August 2004
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CL2 is rated for anything carying under 30v DC, and CL3 is rated for greater than 30v DC. I can't remember the AC voltage, since we use AC so much...
CL3 is also an "In-ceiling" wire.
Mike
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Stay Hungry, Stay Foolish... |
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| Post 9 made on Tuesday March 14, 2006 at 10:16 |
dhesda Long Time Member |
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Posts: | March 2006
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CL comes from the National Electrical Code. It does refer to class, and there is specific aplications for each. Class of wireing is in Article 7 and 8.
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