ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
600 KW 120/208 3 Phase Y protection
by SteveFehr. 07/23/17 09:46 AM
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,253 Are you busy
174,666 Re: Forum
167,084 Need opinion
Who's Online Now
0 registered members (), 61 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#47257 - 01/12/05 10:47 PM Raintite EMT fittings  
livetoride  Offline
Member
Joined: Jan 2005
Posts: 109
san diego ca usa
When installing the new Raintite connectors in a threaded device do you use the rubber washer? On some lights and boxes the female threads start resessed and you can't get but one or two threads but if you remove the washer you can get a good connection. I was taught if it was threaded it was water tight. What are your thoughts? Rod


Work Gear for Electricians and the Trades

#47258 - 01/13/05 12:32 PM Re: Raintite EMT fittings  
hbiss  Offline
Member
Joined: Dec 2003
Posts: 886
Hawthorne, NY USA
I haven't used them yet but I would say that you need the "O" ring. Threaded is not necessarily leak proof and this is especially the case with Bell boxes and connectors. It all depends on whether the full taper of the threads on the fitting or conduit fully engage the threads of the box. That's possible with threaded rigid or IMC conduit but with most fittings the limit is reached when the hex or shoulder contacts the box.

-Hal


#47259 - 01/13/05 09:43 PM Re: Raintite EMT fittings  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,853
Brick, NJ USA
Welcome to the forums!

THe fitting must be used as per the mfg instructions. There are/were an instruction/installation sheet in the last few boxes of RT EMT fittings we bought. I can't say fore sure, but I believe the O-ring is to be used. The UL listing of RT fittings was revoked a while back, as the 'old style' fittings were not 'RT'.

A gut answer will be "use the O-ring"

John


John

#47260 - 01/13/05 10:32 PM Re: Raintite EMT fittings  
livetoride  Offline
Member
Joined: Jan 2005
Posts: 109
san diego ca usa
Danm not what I want to hear but I do see your point. On a horizontal run I am more worried about a tight connection, the threads are short I do not see how water can enter if you have 5 threads but what do I know I have only been at it for 26 yrs. Do we have to put rubber gaskets on ridgid too? I am not talking about the ring on the Emt just the crush washer. If 5 threads is good for explosion proof why is it not good for weather tite?


#47261 - 01/13/05 10:59 PM Re: Raintite EMT fittings  
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Quote
If 5 threads is good for explosion proof why is it not good for weather tite?


Because for explosion proof, all the threads do is provide a long enough path to cool the escaping gases below the ignition point of the surrounding atmosphere. They DO NOT have to completely prevent leakage.

Pipe threads generally aren't leakproof without some kind of sealant. Plumbers need to use teflon tape, pipe dope, etc. to keep threaded pipe joints from leaking.

I would use the O-ring unless the instructions say to omit it.



Member Spotlight
Grover
Grover
Sebago, ME, USA
Posts: 109
Joined: January 2005
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.012s Queries: 14 (0.002s) Memory: 0.7683 MB (Peak: 0.9079 MB) Zlib enabled. Server Time: 2017-07-23 16:54:11 UTC