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#210161 - 05/30/13 05:40 PM Manholes  
akmaster  Offline
Member
Joined: Jun 2012
Posts: 70
alaska
Is there a article in the code that requires a slope of 3% oriented to the manhole? Or does it cover that at all?

Please quote article if possible.

Thank you.

Greg


Don't drive and TEXT! Drive now TALK LATER!

2017 / 2014 NEC & Related Books and Study Guides

#210163 - 05/30/13 05:58 PM Re: Manholes [Re: akmaster]  
akmaster  Offline
Member
Joined: Jun 2012
Posts: 70
alaska
I believe article 310 covers manholes..


Don't drive and TEXT! Drive now TALK LATER!

#210173 - 05/31/13 08:03 PM Re: Manholes [Re: akmaster]  
harold endean  Offline
Member
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
Is the manhole owned by a utility company or privately owned? Is this a service wire, feeder wire from 1 building to another? Maybe the guys need a little more info.


#210175 - 05/31/13 08:20 PM Re: Manholes [Re: akmaster]  
akmaster  Offline
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Joined: Jun 2012
Posts: 70
alaska
It is one of many manholes on an ethanol project...it will contain Medium voltage cables (4160) fiber and control and DC circuits..the are 8'x 8'x8'. They have a base and a top...
the specs call for a 0.3% slope TOWARDS the manhole..

I did not find that requirement anywhere in the code..

It seems they will need racks inside to rack the cables as well..

Thanks,
Greg


Don't drive and TEXT! Drive now TALK LATER!

#210176 - 05/31/13 09:24 PM Re: Manholes [Re: akmaster]  
gfretwell  Online Content


Member
Joined: Jul 2004
Posts: 9,103
Estero,Fl,usa
Toward the manhole? Is this also the storm drain system?


Greg Fretwell

#210182 - 06/01/13 02:36 PM Re: Manholes [Re: akmaster]  
harold endean  Offline
Member
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
Greg,


Check sec. 110 V of the NEC, that talks about manholes and their construction also sec. 490 talks about voltage over 600. You also might have to refer to the National Safety Code. Most utilities follow those rules. I might have an old NESC book around, I would have to look.


#210186 - 06/01/13 04:39 PM Re: Manholes [Re: akmaster]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,857
Brick, NJ USA
This may say something: From '08 Handbook:

"110.70 General.
Electrical enclosures intended for personnel entry and specifically fabricated for this purpose shall be of sufficient size to provide safe work space about electrical equipment with live parts that is likely to require examination, adjustment, servicing, or maintenance while energized. Such enclosures shall have sufficient size to permit ready installation or withdrawal of the conductors employed without damage to the conductors or to their insulation. They shall comply with the provisions of this part.
Exception: Where electrical enclosures covered by Part V of this article are part of an industrial wiring system operating under conditions of maintenance and supervision that ensure that only qualified persons monitor and supervise the system, they shall be permitted to be designed and installed in accordance with appropriate engineering practice. If required by the authority having jurisdiction, design" (documentation may be required)

Last edited by HotLine1; 06/01/13 04:41 PM. Reason: added text in parenthesis

John

#210208 - 06/03/13 02:17 PM Re: Manholes [Re: akmaster]  
akmaster  Offline
Member
Joined: Jun 2012
Posts: 70
alaska
Thanks for the replies. @ Greg...yes towards the manhole...

@hotline...thanks I will take a look...

I can not find any requirement regarding slope of 0.3 percent towards the manhole for conduits...

does this include the whole run from man hole to man hole?

regards

Greg


Don't drive and TEXT! Drive now TALK LATER!

#210230 - 06/04/13 02:15 PM Re: Manholes [Re: akmaster]  
akmaster  Offline
Member
Joined: Jun 2012
Posts: 70
alaska
Another question: Is it not a requirement that manholes with high voltage are required to have the cover labeled "DANGER HIGH VOLTAGE"?

Thanks

GW

Last edited by akmaster; 06/04/13 02:15 PM.

Don't drive and TEXT! Drive now TALK LATER!

#210231 - 06/04/13 02:25 PM Re: Manholes [Re: akmaster]  
akmaster  Offline
Member
Joined: Jun 2012
Posts: 70
alaska
One more...Does the Manhole cover have to be grounded?


Don't drive and TEXT! Drive now TALK LATER!

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