I would say it's possible to install 3/4" EMT in bar joist and secure it with plastic tyrap material. A lot would depend on the size of the tyraps and the frequency of the tying. There is not much in the NEC about this so the judgment of the inspector kicks in.
This leads me to the next logical question. How about mc cable? What is the opinion of the minds here about strapping mc with tie wraps?. Just curious, because I am currently doing a job that way and haven't called in for rough inspection yet.
Re: EMT installation#98581 06/03/0602:16 AM06/03/0602:16 AM
I don't see why not, and have done it a few times. Only in a pinch.... Not in an exposed cieling though. I would also metion that certain types are not rated for prolonged exposure to sunlight. And would fail over time.
Normally I use metal tie wire.
Mark Heller "Well - I oughta....." -Jackie Gleason
Re: EMT installation#98582 06/03/0607:33 AM06/03/0607:33 AM
How about mc cable? What is the opinion of the minds here about strapping mc with tie wraps?.
330.30(A)- Type MC cable shall be supported and secured by staples, cable ties, hangers, or similiar fittings or other approved means designed and installed so as not to damage the cable.
Interesting how the code directly specifies the use of tie wraps as being ok and it doesnt'for EMT. EMT needs to be installed more securely anyway b/c of pulling the wire through and adding circuits, etc...,
[This message has been edited by GalwayElectric (edited 06-03-2006).]
Re: EMT installation#98583 06/03/0608:24 AM06/03/0608:24 AM
Most Caddy type products are listed for 'positioning only' whatever that means.
I always interpreted that as meaning they were OK for holding conduit etc. in place, but not for "dynamic load" type applications. i.e I wouldn't use them as part of an overhead lifting setup or whatever...