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infinity said:
No, a concentric KO's and a drilled hole are not the same thing. A concentric KO is a group of different size rings that allow you to remove only the ones required for you size raceway. For example it might be in the range of 1/2-1.25". If you removed all of the rings then the KO and the drilled hole are the same.

Your post #17 is asking about outdoors so in a wet location you cannot use a 4" square 1900 box. The use of a Myers hub is in wet locations when entering a box that does not have a hub like in post #18.
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Thank you so essentially you would never really use a Meyers hub in an outdoor location for a 4” box??
 
horsegoer said:
If you had outdoor 4" hubbed box running RGS conduit would you use the meyers hub then?

I would think just spinning the RGS into a threaded hub would not create a good seal outdoors to prevent any water etc.
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You do the same thing with couplings and conduit bodies and it is good enough there.
 
horsegoer said:
So in what instance(or type of box), that you could think of, would you use the hub I posted outdoors and when connecting RGS to a box?
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Anything you need to drill a hole in to make an entry for the most part.

Boxes with pre made ko's or with concentric/eccentric in other than the bottom or lower sides below live components wouldn't be suitable for outdoors anyway, so you are not likely to need them when encountering those ko's.
 
Raceways in wet locations are not watertight and not required to be. If you spin a RMC elbow into a hub and it doesn't point in the direction that you need you unscrew it enough to make it work, same with a coupling.
 
infinity said:
Raceways in wet locations are not watertight and not required to be. If you spin a RMC elbow into a hub and it doesn't point in the direction that you need you unscrew it enough to make it work, same with a coupling.
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but yet we need those stupid "raintight fittings" instead of standard compression fittings for EMT, all because someone had a solution looking for a problem I guess.
 
kwired said:
but yet we need those stupid "raintight fittings" instead of standard compression fittings for EMT, all because someone had a solution looking for a problem I guess.
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Still trying to figure out that one. :unsure:
 
infinity said:
Still trying to figure out that one. :unsure:
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I use them a lot, and is a PITA. About 90% of them won't let the tube all the way in the fitting without disassembling the fitting and getting that stupid nylon ferrule to slip over the end of the tube. With a coupling you are doing it twice on same fitting. If you jam the tube in real hard you possibly damage the ferrule. Then on top of that the stupid gasket for the connectors fails in sunlight within a year or two and you have leaky entry into your enclosure that is worse than what a set screw fitting would leak, plus no tight connection for bonding purposes.

I quit using the gaskets and gone back to using myers hubs with the connectors like we used to do when we only had standard compression fittings. Haven't had an inspector say a word about it, but he will get an earful of information from me if he ever does want to reject it.
 
kwired said:
Anything you need to drill a hole in to make an entry for the most part.

Boxes with pre made ko's or with concentric/eccentric in other than the bottom or lower sides below live components wouldn't be suitable for outdoors anyway, so you are not likely to need them when encountering those ko's.
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That an interesting point . So Usually outdoor rated boxes won’t have concentric/eccentric KO’s?
 
horsegoer said:
If you had outdoor 4" hubbed box running RGS conduit would you use the meyers hub then?
I would think just spinning the RGS into a threaded hub would not create a good seal outdoors to prevent any water etc.
Click to expand...
kwired said:
You do the same thing with couplings and conduit bodies and it is good enough there.
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And with the Myers hub you're also spinning the RGS into a threaded hub. It's just that the Myers hub is field installable instead of being an integral part of the factory assembly. So if there is any potential for leakage at the joint with the RGS it should be similar in either case.
 
horsegoer said:
That an interesting point . So Usually outdoor rated boxes won’t have concentric/eccentric KO’s?
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No Ko's period above live components that are installed inside if they do have them.

3R loadcenters and meter socket enclosures are pretty common examples. They often have Ko's in bottom wall and on lower ends of side walls. nothing above that except maybe bolt on hub in top wall. If you don't use the bolt on hub it is either supplied with a bolt on blank cap or you may need to supply one - more common on meter sockets to need to purchase the blank separately.
 
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