The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Topic Options
Rate This Topic
#92066 - 02/24/05 07:44 PM How deep?
George Little Offline
Member
Registered: 01/18/04
Posts: 1492
Loc: Michigan USA
How deep should electrical conduit be under a garage floor? Typically 4" thick concrete.
_________________________
George Little
Top
2017 / 2014 NEC & Related Books and Study Guides
#92067 - 02/24/05 10:19 PM Re: How deep?
gfretwell Offline


Member
Registered: 07/20/04
Posts: 9066
Loc: Estero,Fl,usa
I see the question with 300.5 but I think it is still "under a building" and 0" min below the slab.
If this is a car port or parking pad (outside parking area in a residence)it does look like 18"
_________________________
Greg Fretwell
Top
#92068 - 02/25/05 01:46 AM Re: How deep?
shortcircuit Offline
Member
Registered: 06/27/04
Posts: 608
Loc: massachusetts
My interpretation...0" deep, and the code doesn't specify the need for concrete cover.

shortcircuit
Top
#92069 - 02/25/05 06:04 AM Re: How deep?
George Little Offline
Member
Registered: 01/18/04
Posts: 1492
Loc: Michigan USA
Notice that if we are talking Service Conductors under a building with no concrete floor we are required to have 18" of cover- 230.6(4). We could have this with a building such as a pole barn etc.

Keep editing this till you get it right George


[This message has been edited by George Little (edited 02-26-2005).]
_________________________
George Little
Top
#92070 - 02/25/05 05:56 PM Re: How deep?
HLCbuild Offline
Member
Registered: 12/05/04
Posts: 206
Loc: Herndon,Va USA
I think we go to Art. 100 definitions and review "Garage" which is very specific in saying this is a "building". From here it's back to Art 300-5 "under a building" which requires 0 depth.
Top
#92071 - 02/26/05 04:53 PM Re: How deep?
PCBelarge Offline
Member
Registered: 06/08/03
Posts: 657
Loc: Dobbs Ferry, NY, USA
Read George's post - 230.6(4
_________________________
Pierre Belarge
Top

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box

Recent Posts
Looking for older post
by sparkyinak
Today at 12:27 AM
License exam
by TRUE POWER
Yesterday at 11:33 PM
Members: Non-Members: Did you know?
by Admin
Yesterday at 02:34 PM
Safety at heights?
by HotLine1
01/21/17 08:51 PM
International Wire Colour Codes
by Texas_Ranger
01/21/17 03:29 PM

Who's Online
1 registered (sparkyinak), 96 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
New in the Gallery:
Desk-mounted "power-board"
Top Posters
gfretwell 9066
Trumpy 8560
pauluk 7693
HotLine1 6833
sparky 5545
Member Spotlight
Member Since: 08/01/07
Posts: 62

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals