Wire supports

[David C. Macy]

I would think copper pipe and eyelet type screws are not approved methods of wire supports. The 2nd picture runs perpendiclar to sub floor and it gets worse. I am glad I looked in an access behind a fireplace over a toilet and under a shelf.(Need to make an appointment with Chiropractician as my body is not meant to be in a position like that)

What is the approved method for running wires parellel to joists? I have seen on board but the name escapes me. (Raceway)!!

[Jim Port]

Wires could be secured using properly sized staples. Some staples are good for up to 2 flat cables under one staple. Another method, and the one that I prefer, is something like the 3M stak-it. Less nailing than staples and it maintains spacing better for air circulation.

[Larry D. Kage]

Originally Posted by Jim Port

Another method, and the one that I prefer, is something like the 3M stak-it. Less nailing than staples and it maintains spacing better for air circulation.

Cool. I hadn't seen those before...

[David P. Valley]

I always recommend removing tie-wraps from all bundled branch wiring.

I like this....

[Jeffrey R. Wicklander]

Originally Posted by dvalley

I always recommend removing tie-wraps from all bundled branch wiring.

I like this....

Attachment 29790

Including the tie-wraps identifying multi-wire circuits in a panel?


Jeff

[Paul W. Abernathy]

Originally Posted by jwicklander

Including the tie-wraps identifying multi-wire circuits in a panel?


Jeff

Thats a different application( refering directly to Jeff's reply only )....If the conductors are within a cable that run into the panel no group identification is required. If they still choose to do it so be it but not a code requirement. If you have a conduit or raceway that has multi-wire branch circuits within it in the 2008 NEC you would need to identify them as a grouping to their respected grounded conductor. If the conduit only has one set of multi-wire branch circuits then it is obvious and no grouping is required. Just remember, this new requirement does not apply to cables and it NEW for 2008 so probably wont apply to alot of HI situations unless it is a new home and in chicago...lol


Here...since I am the Cut and Paste King...I will give you some from the NEC.


210.4(D) Grouping.

The ungrounded and grounded conductors

of each multiwire branch circuit shall be grouped by wire
ties or similar means in at least one location within the
panelboard or other point of origination.

Exception: The requirement for grouping shall not apply if
the circuit enters from a cable or raceway unique to the
circuit that makes the grouping obvious.

So basically cables do not apply and if it is a raceway with only one set of multi-wire branch circuits within it then it still does not apply. Hope that was somewhat helpful and not confusing.

[Paul W. Abernathy]

Oh..BTW. The other issue that comes up with that application since we can't see it all is the bundling issue. Basically, if the conductors run more than 24 inches bundled then ampacity adjustments should take place....

From what I see ( and can't really tell very well ) I see 5 12-2's maybe but could be a few 12-3's in their. The number of CCC's would be 10 if we took the assumption of 5 12-2's. If we look at table 310.15(B)(2)(a) an adjustment of 50% would have to take place. ( again assuming this bundle is run for 24" at least ). Solution, seperate them so they are not bundled more than 24".