Burg. alarm cable on ceiling tile?

Status
Not open for further replies.
As I read it again it says that "...installed exposed on the outer surface of ceiling..." then it goes on to say "...shall be attached to structural components by straps..."

Is the outer surface considered below the ceiling? The pics in the Analysis show it above the ceiling.

The analysis of the change says "...The last sentence of this paragraph makes it clear that just laying cables in and on parts of the building without proper supporting devices is not permitted by this rule."

Now before we get going to much farther we are talking about supporting the cable, correct? Not just access being allowed. Though one will probably take care of the other.
 
Wonder if I've been doing it wrong?

Wonder if I've been doing it wrong?

Don,
I may have it all wrong, but doesn't 90.3 stipulates that chapters 5,6 and 7 supplement or modify chapters 1 through 4? If this is the case, I don't see anything in 725.7 (2005 NEC) that "supplements or modifies" the following:

300.11 Securing and Supporting

(A) Secured in Place: Raceways, cable assemblies, boxes, cabinets, and fittings shall be securely fastened in place. Support wires that do not provide secure support shall not be permitted as the sole support. Support wires and associated fittings that provide secure support and that are installed in addition to the ceiling grid support wires shall be permitted as the sole support. Where independent support wires are used, they shall be secured at both ends. Cables and raceways shall not be supported by ceiling grids.

That being said, wouldn't 300.11 still apply to these "data cables"?

I'm hoping that you agree with me here....... if not I've defected several jobs for the cables being installed just laying on the ceiling tiles.

Pete
 
Pete,
I may have it all wrong, but doesn't 90.3 stipulates that chapters 5,6 and 7 supplement or modify chapters 1 through 4? If this is the case, I don't see anything in 725.7 (2005 NEC) that "supplements or modifies" the following:
Click to expand...
This is the modification:
725.3 Other Articles
Circuits and equipment shall comply with the articles or sections listed in 725.3(A) through 725.3(G). Only those sections of Article 300 referenced in this article shall apply to Class 1, Class 2, and Class 3 circuits.
Click to expand...
300.11 is not referenced in Article 300.
Don
 
John,
The analysis of the change says "...The last sentence of this paragraph makes it clear that just laying cables in and on parts of the building without proper supporting devices is not permitted by this rule."
Click to expand...
That may have been the intent, but the way I read the wording that does not apply to anything above the ceiling. I know that is how it is shown in the handbook and even in Mike's book, but the wording does not support the idea that this rule applies above the layin ceiling. I don't see any requirement that Article 725 cables be supported in general.
Don
 
That's fair enough, that's why we get paid to figure out what it means.

My take is that it says that the cable has to be supported, but I will agree that the wording could use some work.

Sorry, Usually I go along with your thinking, but I don't think we're going to agree on this one.
 
Eating crow.....

Eating crow.....

Thanks for opening my eye's Don. I obviously missed 725.3.

I wonder how a proposal to include 300.11 as a referenced part of article 725 would be received? If it were included I think it would most likely clear up the intent of 725.7.

Any thoughts?

Pete
 
Status
Not open for further replies.
Top