300.50 cover requirements

[Dennis Alwon]

Here is the special footnote

Cover is defined as the shortest distance in millimeters (inches) measured between a point on the top surface of any direct-buried conductor, cable, conduit, or other raceway and the top surface of finished grade, concrete, or similar cover.

Edit. I obviously don't believe what I wrote in the earlier post about needing 6' of dirt cover.

 

[chris kennedy]

If you read note (a) cover is defined clearly as top of pipe to finished grade. No where does it say "in addition to the concrete" from what I see.

As you stated, black and white.

 

[Dennis Alwon]

:grin: Really...

I meant to copy sparky. Sorry. :grin:

 

[sparkyboys]

but a university is not industrial, so its still 24"

 

[Dennis Alwon]

but a university is not industrial, so its still 24"

I think that is the real question but why should that matter in the real world-- I don't know.

 

[ddavi280]

This is the Physical plant portion of the university, it is most definately industrial and is maintained by a Engineers and an Oregon General Supervising electrician. This installation is behind a locked gate.

 

[Dennis Alwon]

This is the Physical plant portion of the university, it is most definately industrial and is maintained by a Engineers and an Oregon General Supervising electrician. This installation is behind a locked gate.

Go for it. Sounds like you got it figured out.

 

[ddavi280]

A topic worth discussing I thought. I have an inspecter who is still undecided.

 

[chris kennedy]

I have an inspecter who is still undecided.

Invite him to this Forum. We love inspectors here, they taste like chicken.:grin:

Really, the more inspectors we can get on here the better.

 

[SEO]

Invite him to this Forum. We love inspectors here, they taste like chicken.:grin:

Really, the more inspectors we can get on here the better.

Probably burnt chicken they seem to take a lot of heat.:grin:

 

[dcspector]

Probably burnt chicken they seem to take a lot of heat.:grin:

I love it......but I am a masochist.:grin: BTW this was a good thread had me looking.

 

[hardworkingstiff]

So you have a clear picture of what we have... Finished grade will have 1 inch of asphalt followed by 6 inches of concrete to the top of my conduit. (which can't go any deeper due to conditions).

Just curious, what conditions exist that won't allow 24" or more of cover?

I'm not sure you are an "industrial establishment". The area is in control, but............... ?

 

[ddavi280]

Boxed in by a tunnell with steam lines. Original plan was to go under but there was a sump system in the way and extensive use of pea gravel backfill.Half of the pipes can go through and the other half will go over the top of the tunnell.