ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/18/18 10:41 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
VDE 0100 to introduce AFCIs
by LongRunner. 01/17/18 10:32 AM
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 6 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
LiftStation Installation #72007
11/14/06 03:11 PM
11/14/06 03:11 PM
R
Radcon  Offline OP
Junior Member
Joined: Nov 2006
Posts: 2
Looking for a bit of help in regards to a lift station installation. Where could I obtain the proper guidelines and NEC references. The job consists of adding a control panel (outdoors) next to the new well. The grey areas are if explosion proof fittings/Chico are to be used before conduit enters cabinet, type of conduit used and sealing of conduit inside of the well. It will contain sanitary and minimal sewage. I need to run 2 conduits for the pumps and 1 for a level probe. I was going to drill through the pre-forms at the top elbow out/stub-up to panel. Thanks.

Work Gear for Electricians and the Trades
Re: LiftStation Installation #72008
11/14/06 03:40 PM
11/14/06 03:40 PM
L
LK  Offline
Member
Joined: Jan 2003
Posts: 1,429
New Jersey
On a job like you described, we want detailed, sealed engineering prints, before any bidding or work is started.

Reason for requiring the sealed prints is, we do not have professional design build coverages, i don't know of many contractor insurances that do have design build coverage, a large number of EC's just dive in and do them, without understanding all the risks involved, my view is protect yourself, and do it right.

Re: LiftStation Installation #72009
11/14/06 08:11 PM
11/14/06 08:11 PM
T
ThreePhase  Offline
Junior Member
Joined: Sep 2006
Posts: 4
I have done several lift stations in the past few years. Here is what I did, and what I was responsible for. Run the power to a sewer contractor supplied control cabinet. Mount the control cabinet. Run 2- 2” conduits from control panel to pit. Run 1- ¾” conduit and 3- #12 wires (blk, wht, grn) from control panel to pit and install an outlet for a sump pump. All other work was completed by the sewer contractor, or lift station representative. I don’t know if the used chico or not, as I was not responsible for that portion of work. In our proposals I state it this way.

1-Lift station power feed XX amps XXX volts. Lift station work as follows:
Mount and install lift station control panel (supplied by others).
Pipe and wire feed from building to control panel disconnect switch.
Mount and install 1- outlet in pit to control sump pump, others to wire to control panel.
Run 2 – 2” conduits from control panel to lift station pit.
Concrete control pad by others.
All other work pertaining to the operation of the lift station to be preformed by others.

Re: LiftStation Installation #72010
11/15/06 05:46 AM
11/15/06 05:46 AM
R
Radcon  Offline OP
Junior Member
Joined: Nov 2006
Posts: 2
I must clear up that this installation is at a plant I am currently employed at. My main concern is if this meets explosion-proof criteria and where I could formally find this info - from a book or from those-in-the-know. I may plan on using explosion-proof fittings anyway, but if not necessary I would rather not (to eliminate splices in well during future repairs). What materials are needed from well to panel - RMC? aluminium rigid? I know PVC is not an option. I will not be adding any type of receptacle - rather hard-wire from 3P 480VAC
pumps to motorstarters in the panel.

Re: LiftStation Installation #72011
11/15/06 09:52 AM
11/15/06 09:52 AM
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
This is a subject that is under review for the next edition of the NEC.

As it now stands, only a registered 'professional engineer' is deemed as qualified to make the determination of where the 'classified' areas are.

There is a proposal the change this to "qualified person." This is NOT a loophole- nor should it be considered a meand for just anyone to wave a wand and say "I'm qualified." Rather, the proposal asserts that having a PE license does not infer any expertise in this area at all, and that there are many other professions out there that do have expertise here.

As a general rule, it is NEVER the responsibility of the electrician to make this decision. Don't let anyone stick you with it; there is too much at risk.

Nor is someone's assertion that "they do it all the time" enough. If they won't sign, their opinion is just eyewash. At the very least, rely upon your local inspector; he ought to know where to get the information.

Re: LiftStation Installation #72012
11/15/06 11:57 AM
11/15/06 11:57 AM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,166
Estero,Fl,usa
I inspected several of these for the state. They were fairly small stations in parks. The pipe was always steel RMC with seal offs below the listed cabinet assemblies. I think the only way you can avoid the seal off is if they can demonstrate a certain amount of air turnover in the pit. That is usually the last thing they want to do because of the smell so they accept the classified location designation without question.


Greg Fretwell

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,890
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Admin 20
sparky 18
Potseal 14
Popular Topics(Views)
243,544 Are you busy
180,351 Re: Forum
170,832 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.016s Queries: 14 (0.003s) Memory: 0.9779 MB (Peak: 1.1190 MB) Zlib enabled. Server Time: 2018-01-19 07:24:37 UTC