EMT - set screw vs. comrpession fittings
EMT - set screw vs. comrpession fittings
(OP)
I have a client who's standard specification requires comperssion fittings for EMT. I think they could save considerable money by allowing set screw type fittings for indoor applications. I'm curious about opinions as to the relative advantages of one type vs. the other.
I've heard the argument that compression type are more rugged and less likely to come apart. Is there any evidence to support that?
I've heard the argument that compression type are more rugged and less likely to come apart. Is there any evidence to support that?






RE: EMT - set screw vs. comrpession fittings
But I don't much to back that up other than general comments from other engineers over the years..
RE: EMT - set screw vs. comrpession fittings
Both set screw and compression are worthless if not installed properly.
RE: EMT - set screw vs. comrpession fittings
RE: EMT - set screw vs. comrpession fittings
RE: EMT - set screw vs. comrpession fittings
RE: EMT - set screw vs. comrpession fittings
Ron - why would there be a difference in longevity for steel and not for diecast?
RE: EMT - set screw vs. comrpession fittings
RE: EMT - set screw vs. comrpession fittings
That's why I find it critical to get into the field as each part of the construction process is begun. When the first part of the underground work is layed, when rough-in is started, right before any conductors are pulled, etc..., so that I can catch trends and non-compliant installations early and have it all ripped out and corrected before it gets to the point where the construction schedule is adversely impacted. We can't catch it all, but if you catch it early enough, you can set the direction for the installation and assure that the majority of the installation will be as specified.
RE: EMT - set screw vs. comrpession fittings
Of course, if it is a "spec" job, I will install the material that is required by the contract.
Don
RE: EMT - set screw vs. comrpession fittings
Since a set screw coupling has metal to metal contact for ..... maybe 30-40% of the circumference, and compression has circumferential metal to metal contact, I think (I've never tested) compression would have reduced impedance and also carry fault current if called upon to do so.
RE: EMT - set screw vs. comrpession fittings
RE: EMT - set screw vs. comrpession fittings
RE: EMT - set screw vs. comrpession fittings