Steel Sip EMT Couplings

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Mark Smith

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Does anyone know if a 3/4 inch emt slip coupling are Manuf.? We have a project that off site pre-fab will require these once we get on site ( several 100 or more
 
Listing issues aside, I have seen them made in the field by grinding away the ridge on the inside of die cast fittings. Can't ever say that I've seen a steel slip fitting for EMT.

Welcome to the forum. :)
 
infinity said:
Listing issues aside, I have seen them made in the field by grinding away the ridge on the inside of die cast fittings. Can't ever say that I've seen a steel slip fitting for EMT.
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Depending on how the steel coupling is made it might be pretty easy to make one. Some steel couplings simply have a small indent for the stop, which could be ground away pretty easily.
 
peter d said:
Depending on how the steel coupling is made it might be pretty easy to make one. Some steel couplings simply have a small indent for the stop, which could be ground away pretty easily.
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I know the ones that you mean. Those would probably work but you might grind away most of the material at the dimple which may be obvious after you're done grinding.
 
glene77is said:
Whillis,
Found them, UL approved.
But at $53 each, I wonder if there is something else.
Several hiundred of these would be pricey.
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Are we talking about expansion fittings or slip couplings? Or are you suggesting that we use the expansion fitting as a slip coupling?
 
Do couplings even need to be listed?

Too bad they couldn't do the joining sections in IMC, and just use a RMC slip couplings. They're a lot easier to come by.
 
TOOL_5150 said:
Yes. I had one of those couplings for a while.. but junked it since i dont have the indenter. It had an interior ring, not just a dimple.

~Matt
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I managed to scrounge up a few couplings with the dimple stop, but they all had more than one dimple. That would be a lot of filing.
 
Mark Smith said:
Does anyone know if a 3/4 inch emt slip coupling are Manuf.? We have a project that off site pre-fab will require these once we get on site ( several 100 or more
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I remember hammering a piece of EMT through a die cast fitting to make one.
Im sure that with the right sized bit and a drill press you caould make 100 of them out of regular couplings in an hour
 
On the die cast ones you can just use your beater scerwdriver and knock the stop out. But for a hundred or so a drill press might be the way to go.
 
Infinity,
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Several manufacturers make them, here's an example: http://kscdirect.com/item/CRH+XJG2...2BFitting%0A
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I responded to the above quote, and URL.
The one I followed to the URL was 'pricey'.
I was not suggesting to swap a 'expansion' for a 'slip'.

Although, I have swapped out parts that worked better,
and have done a little machining on parts to make them work better.
In other parts of this thread, there are some ideas along that line.

The longer I work in electrical, the more interesting it becomes.
Thanks for the comment.
 
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Cow said:
What about a piece of flex and emt-to-flex conn as an alternative? That's what we use for expansion joints...
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Interesting suggestion, 'FNMC' flex as an "Expansion Joint".
We have also used flex between machines,
and across adjustable sections of conveyers.

We always pull a green EGC, too.

Interesting forum.
 
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