- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
Are compression couplings/connectors required on EMT at a fire pump controller? Can I install a set screw connector in a conduit hub and call it a day?
Fire Pump Controller Wiring Methods
- Thread starter George Stolz
- Start date
- Status
cadpoint
Senior Member
- Location
- Durham, NC
- Occupation
- Electrician - but not by NC Law.
Code wise, I don't know!
I'd match existing construction at the least, most fire pumps are located in wet
or possible wet conditions. Engine rooms, pump rooms, enclosed and forgotten
riser rooms.
Doesn't seem to make sense to have non compression fitting to change over to seal tight?
I'd match existing construction at the least, most fire pumps are located in wet
or possible wet conditions. Engine rooms, pump rooms, enclosed and forgotten
riser rooms.
Doesn't seem to make sense to have non compression fitting to change over to seal tight?
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
Jude, see 695.6(J).
brother
Senior Member
Its my understanding you cannot use set screw because the wiring to the controller has to have a 2hr (I think) fire rating and set screws do not provide this only compression or rigid conduit with threaded couplings NFPA 20. Also, what about the hubs?
The other question would be Is this the control wiring to the fp controller? if so, you cannot use emt per 2014 NEC 695.14 (E)
cadpoint
Senior Member
- Location
- Durham, NC
- Occupation
- Electrician - but not by NC Law.
Why I answered before reading the Code, in respects to one of your questions, I have no excuse! 
I went and looked at the multiple on site working red (fire) pumps at my job, what a
mess.
Ridge to 1900 Box to flex, EMT with screw fitting to coupling to flex,about three other
various combinations
Now it could well be that the various red pumps where being used for other circulation
of product and such. But, it was sad to see the various different installs all with-in the
same 2500 square feet!
I went and looked at the multiple on site working red (fire) pumps at my job, what a
mess.
Ridge to 1900 Box to flex, EMT with screw fitting to coupling to flex,about three other
various combinations
Now it could well be that the various red pumps where being used for other circulation
of product and such. But, it was sad to see the various different installs all with-in the
same 2500 square feet!
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
Good question. I'm inclined to think it needs to be a rain-tight compression connector due to 695.6(J)(2) and a fire pump controller enclosure is at least a Type 2 drip-proof.
It is worth noting that EMT was just added to the 2011 NEC along with language regarding this issue. But the idea of using EMT at all begs the question of how to connect EMT into the required hub with out violating the listing of the EMT connector and hub as UL specifically states that EMT fittings have only been investigated for use with lock nuts and hubs only with threaded conduit.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
I must be behind the curve on this - where is this written?
- Location
- Massachusetts
White book.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
It's a big book, Bob.
- Location
- Massachusetts
It's a big book, Bob.
Sorry, I would imagine the section for EMT fittings.
I will go back to sleep now.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
I'm on the road, so I was trying to find it on their web version, which wasn't working out.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
Found it: http://database.ul.com/cgi-bin/XYV/...n=versionless&parent_id=1073985908&sequence=1
That rings a bell. Well, that stinks too, but doesn't address my original problem.
That rings a bell. Well, that stinks too, but doesn't address my original problem.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
Could 695.6(J)(1) also be read as "Where you use a conduit hub, it shall be listed."?
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
George,
Take a look at the White Book-FKAV for EMT fittings and KDER (and DWTT) for Hubs.
It would seem that Art. 695 requires something that can't be done within the listing. This is an issue that has come up as an issue for us lately. We are getting with UL and NFPA to discus this in June.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
Seems to me that 695.6(J)(1) is telling us that we MUST use a hub. But as I said, how would you then connect EMT?
Am I missing something here? What's a mother to do...
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
Simple: You can use EMT as long as you do not connect it.
This is not the typical situation where a product is mandated but not available, but the same code provision for that might be applied.
Tapatalk!
This is not the typical situation where a product is mandated but not available, but the same code provision for that might be applied.
Tapatalk!
- Status