Looking for a listed solution to convert set screw fittings to be plenum rated for return air space in Chicago. Any ideas? One of our field leaders has installed quite a bit of conduit using set screw instead of compression fittings.
Looking for a listed solution to convert set screw fittings to be plenum rated for return air space in Chicago. Any ideas? One of our field leaders has installed quite a bit of conduit using set screw instead of compression fittings.
As others have asked, is this a local code amendment or could it be a job specification ? I have been on jobs in the past where compression fitting where required simply because that was the choice of the engineers that provided the specifications.
The first question should be who is requiring them to be changed and for what reason?
I've seen more compression fittings come loose than set-screw, but that's because they are found in places where the installation is more likely to be abused. However, in both cases, I think the reason was because someone couldn't be bothered to tighten them properly or secure the conduit properly.
I am not a huge fan of the set screw type EMT connectors since I have seen a fair number of loose ones. never seen a compression fitting come loose. It probably happens, but I have not seen one.
Fire caulk?
Perhaps the rationale is that air (and smoke) movement between the inside of the conduit and the plenum space is better controlled with a compression fitting...IDK.
Same here. On one hospital project the specs did not allow compression emt fittings, this I liked and I asked the engineer why he wrote his spec that way, he said he knew a screw is easier to tighten than trying to get two pairs of channel locks into tight spaces .
Roger
Get me that man's name and will send him a case of the beverage of his choice and an annual donation to his favorite charity.
I am not a huge fan of the set screw type EMT connectors since I have seen a fair number of loose ones. never seen a compression fitting come loose. It probably happens, but I have not seen one.