ptonsparky
Tom
- Occupation
- EC - retired
Because some of them have/had a gasket that is a genuine unadulterated POS.
Those with the harder material are available and much preferred. Even so, just a tad of exterior grade silicon is a good add.
coming into top of 3R wireway outside
- Thread starter firebird1988
- Start date
- Status
Those with the harder material are available and much preferred. Even so, just a tad of exterior grade silicon is a good add.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
Oh for sure, I wasn't saying they work well, just that they meet code.
Tulsa Electrician
Senior Member
- Location
- Tulsa
- Occupation
- Electrician
Oh for sure, I wasn't saying they work well, just that they meet code.
That's kinda the point I was making based on what Larry said.
That is why it makes good sense.
Greentagger
Senior Member
- Location
- Texas
- Occupation
- Master Electrician, Electrical Inspector
314.15 may be what we’re looking for? It’s reference to fittings.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
That article does not cover metal wireways.
Greentagger
Senior Member
- Location
- Texas
- Occupation
- Master Electrician, Electrical Inspector
But it does cover fittings?
jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
Only fittings used to connect raceways and cables to boxes and conduit bodies. (See scope at beginning of 314.) But then again, our OP is arguably using the 'trough' as a pull box.
FWIW, we use myers hubs.
Greentagger
Senior Member
- Location
- Texas
- Occupation
- Master Electrician, Electrical Inspector
And the wireway is considered as a raceway as defined in scope?
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
The definition of "metal wireway" refers to itself as a raceway.
Of course, the same collection of metal parts might simultaneously meet the definitions of "metal wireway" and of "pull box" (which isn't actually defined anywhere that I see). So then when you use that collection of metal parts, somehow you have to decide whether you are using it as a "metal wireway" subject to Article 376, or a "pull box" subject to Article 314. Or both?
I.e. is this connection in question a transition from one raceway type to another raceway type, or is it a termination of a raceway at a pull box?
Cheers, Wayne
Greentagger
Senior Member
- Location
- Texas
- Occupation
- Master Electrician, Electrical Inspector
And doesn’t 376.10(3) maintain that associated fittings required to comply as fittings are included in scope of 376?
kwired
Electron manager
- Location
- NE Nebraska
Because 99.99% of those I ever did directly install ended up having the gasket deteriorate within a year or two and they were no longer rain tight, plus it resulted in being loose enough fit that there was no bonding either. I only did this for a short time after they pushed the "raintight" EMT fittings on us then went back to using myers hubs for those situations.
The RT fittings are a joke. A standard compression fitting will never leak more water from "rain" than will end up inside the raceway because of condensation anyway. Even if you forget to tighten it this likely is still true in many cases.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
Of course the fittings are a joke. I guess my stance is I don't even see what the point of keeping water out of a 3r wireway is. Even if you go to Great lengths using a Meyers hub, all the rain tight fittings above it are going to leak anyway (plus the risk an idiot inspector will cite threading the EMT connector into a Myers hub which he is technically correct about). So why bother? Why not just save the money on the Myers hub and use just the rain tight fitting which is code approved, maybe add a little silicone if you want.
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
You can use a short RGC nipple and a rainproof RGC to EMT transition fitting.
Cheers, Wayne
kwired
Electron manager
- Location
- NE Nebraska
I see your point to some degree on a wireway, but not always on other enclosures.
From that perspective though what is the point of using a type 3R wireway?
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
I have always wondered what the point is. It's analogous to rain tight EMT fittings. Conductors have to be wet rated anyway and raceways allowed to drain so even if they did keep water out I don't really see what the point is.
letgomywago
Senior Member
- Location
- Washington state and Oregon coast
- Occupation
- residential electrician
The 3r ones have the top set up to drain away from the inside with that little lip. I do think that lip makes a difference but maybe that could be a construction requirement not a listing requirement.
kwired
Electron manager
- Location
- NE Nebraska
A cabinet or junction box can have exposed/semi exposed live components inside a wireway can only have conductors for the most part including splices and taps which if outside need to be wet rated anyway is what this particular aspect is all about. I can see the argument that certain splice/tap methods would not be wet rated and could agree you at least need to maintain the 3R rating if those are in use. But remember 3R has drain holes and often non gasketed doors/access panels so it still doesn't assure there will be no water at all inside the enclosure.
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