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-   -   Running wire through conduit (http://www.diychatroom.com/f18/running-wire-through-conduit-115431/)

picflight 08-27-2011 01:53 PM

Running wire through conduit
 
I am planning on installing a Leviton pull switch lamp holder and an outlet in the attic. I will draw power from a box already there in the attic.

Planned wiring
http://i937.photobucket.com/albums/a...amp_Wiring.jpg

The Runs marked A and B will be some sort of flex metal conduit, perhaps 1/2".
The outlet and lamp will be mounted on metal box.

What sort of conduit for runs A & B do I use to be in compliance?
I am thinking, Southwire 1/2 in. X 100 ft.Flex Alum Conduit.

What sort of wire do I run in the conduit, romex?

Or, option three is to use Southwire Armorlite 25 ft. 14/2-Gauge Solid Metal-Clad Cable.

Code05 08-27-2011 02:10 PM

Option 4: Use NM and only sleeve it where subject to damage.

ddawg16 08-27-2011 02:30 PM

Quote:

Originally Posted by Code05 (Post 716161)
Option 4: Use NM and only sleeve it where subject to damage.

Yep.....no need for conduit if not exposed to potential damage.

You might be thinking wiring in a garage....you can't have exposed Romex...wire has to be in conduit or behind drywall.

Attic is not considered to be occupied on a normal basis.

But if your concerned that you or someone else to accidently damage the wire...then 1/2" armored flex is fine.

picflight 08-27-2011 02:45 PM

Yes, that is exactly what I was thinking, if it can be touched then it has to be covered.
I might not have to do it in the attic but I would like to.

So romex in flex is code?

Code05 08-27-2011 02:57 PM

Romex in flex is legal.

If it is just sleeves, fill does not count.

If it is a complete system, fill counts.

ddawg16 08-27-2011 03:10 PM

Quote:

Originally Posted by picflight (Post 716180)
Yes, that is exactly what I was thinking, if it can be touched then it has to be covered.
I might not have to do it in the attic but I would like to.

So romex in flex is code?

As Code5 says, you can put Romex in flex....as far as I know, the NEC does not prevent it in regular conduit either (b!tch to pull though).

I would double check with your local building office....good chance you have the same rules I do...my building inspector will not allow Romex in conduit...and I believe they consider flex to be conduit as well.

Me personally? I use conduit and THHN up in the attic....that wire is a lot easier to work with.

Code05 08-27-2011 03:14 PM

ddawg, everyone considers Flexible Metallic Conduit as conduit.:)

Local rule no romex in conduit???

picflight 08-27-2011 03:20 PM

Quote:

Originally Posted by Code05
Romex in flex is legal.

If it is just sleeves, fill does not count.

If it is a complete system, fill counts.

What does fill mean?

Code05 08-27-2011 03:23 PM

Quote:

Originally Posted by picflight (Post 716203)
What does fill mean?

It means how many wires you can fill a conduit with.

Code05 08-27-2011 03:26 PM

If you really want to use a metal protected cable. MC would be easier than flex and romex.

picflight 08-27-2011 03:33 PM

Thanks code.

If I use THHN 12 gauge, I will have to buy 2 rolls, black and white? And separate ground?

How is MC different than flex?

Code05 08-27-2011 03:48 PM

Quote:

Originally Posted by picflight (Post 716215)
Thanks code.

If I use THHN 12 gauge, I will have to buy 2 rolls, black and white? And separate ground?

How is MC different than flex?

MC is a cable with the wires inside.

Flex is conduit, you pull the wires inside.

Yes, black,white and green or bare.

ddawg16 08-27-2011 04:10 PM

Maybe some clarification is in order....

You can get 3 kinds of flex....

Metal Flex that already has 3 wires in it....
Metal Flex with no wires....you run your own
And Plastic Flex (some call it Seal Tight) with no wires in it...you run your own.

You typically see Plastic flex used in wet locations....like getting power to a motor that is in a wash down/splash down location

Code05 08-27-2011 04:20 PM

Quote:

Originally Posted by ddawg16 (Post 716234)
Maybe some clarification is in order....

You can get 3 kinds of flex....

Metal Flex that already has 3 wires in it....
Metal Flex with no wires....you run your own
And Plastic Flex (some call it Seal Tight) with no wires in it...you run your own.

You typically see Plastic flex used in wet locations....like getting power to a motor that is in a wash down/splash down location

Actually there is:

Armor Clad cable

Metal Clad cable

Flexible Metal Conduit

Liquidtight Flexible Non Metal Conduit

Liquidtight Flexible Metal Conduit

Electrical Non metal Tubing

picflight 08-27-2011 06:52 PM

I got all the parts this afternoon, it was 105F in San Fernando valley when I went out.

I decided to go with option 3, mc.
This sub-project is part of an attic fan replacement.
Will post pictures of finished wiring.


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