Bundling wires in attic for long run

Status
Not open for further replies.
ivsenroute said:
Thoughts on this one?

Can't wait to see the difference of opinion on this:)

atticwire.jpg
Click to expand...

I don't consider this bundling.

Yes, it would pass here....keeping in mind 320.23(A)

I would have stapled the cables every third (16"OC?) joist ...just because the code requires it.

I've gone (almost) exclusively to outside Meter Main with inside MLO panel.

I try to keep the homeruns as short as possible, so panel placement is always a important factor.

It's easier to run one feeder a long distance than it is 20 home runs.

That and the cost savings of using Aluminum for the feeder makes for a lower cost installation.

Just my opinion
steve
 
It seems as though the consensus is that the cables are not staples or secured and need to be and since this does not appear to be true bundling then no derating is necessary. Sound right?

The language in the code for this needs to be changed because ceiling joists are not floor joists whether or not they are in an attic. Again, maybe a technicality but still there is a difference.

I am also an ICC residential building inspector and building code official so I may look at the codes with a little more scrutiny.

In our area the electrical code is the IRC-2006 and the NEC 2005 is the reference standard. I can see how important it is to know the IRC since some of the requirements for lighting and receptacle locations are not in the NEC but are in the IRC.

If you are in a NEC only state then that of course is different.
 
ivsenroute said:
It seems as though the consensus is that the cables are not staples or secured and need to be and since this does not appear to be true bundling then no derating is necessary. Sound right?
Click to expand...
Sounds right to me, but it is subject to interpretation. Until I joined this forum I never thought of bridle rings as bundling, but they are referenced in 310.15 in that way.

The language in the code for this needs to be changed because ceiling joists are not floor joists whether or not they are in an attic. Again, maybe a technicality but still there is a difference.
Click to expand...
Could be - you could write a proposal, a similar one was rejected last cycle:

7-8 Log #2944 NEC-P07 Final Action: Reject
(320.23(A))

(Proposal omitted, didn't make any sense when pasted into the forum with no strikethroughs)

Substantiation: This proposal intends editorial improvements rather than
substantive changes. The term “framing members” is being used in some
locations as often, the joists that serve as the lower level of the attic are
referred to as ceiling joists and not floor joists.
In addition, the sentence is proposed to be restructured for ease of reading and
understanding.

Panel Meeting Action: Reject

Panel Statement: The existing wording is specific and adequate.

Number Eligible to Vote: 14
Ballot Results: Affirmative: 13 Negative: 1

Explanation of Negative:
SCHUMACHER, D.: This should have been accepted, it clears up any
misunderstanding as to the definition of floor joists, and ceiling joists, by
calling them framing members.
Click to expand...
 
This would definetly pass in my area. I have done this many times. I saw a job, not done by me, a couple weeks ago. Where the homeruns were run on running boards in the basement. There were three furring strips side by side almost the entire length of the basement. There were twenty wires at the panel end and six left at the far end, and it passed. It looked like a heck of a mess, some of the wwires criss-crossed.
 
Status
Not open for further replies.
Top