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How deep? #92066
02/24/05 11:44 PM
02/24/05 11:44 PM
G
George Little  Offline OP
Member
Joined: Jan 2004
Posts: 1,498
Michigan USA
How deep should electrical conduit be under a garage floor? Typically 4" thick concrete.


George Little
2017 / 2014 NEC & Related Books and Study Guides
Re: How deep? #92067
02/25/05 02:19 AM
02/25/05 02:19 AM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,373
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
Re: How deep? #92068
02/25/05 05:46 AM
02/25/05 05:46 AM
S
shortcircuit  Offline
Member
Joined: Jun 2004
Posts: 610
massachusetts
My interpretation...0" deep, and the code doesn't specify the need for concrete cover.

shortcircuit

Re: How deep? #92069
02/25/05 10:04 AM
02/25/05 10:04 AM
G
George Little  Offline OP
Member
Joined: Jan 2004
Posts: 1,498
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 [Linked Image]


[This message has been edited by George Little (edited 02-26-2005).]


George Little
Re: How deep? #92070
02/25/05 09:56 PM
02/25/05 09:56 PM
H
HLCbuild  Offline
Member
Joined: Dec 2004
Posts: 209
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.

Re: How deep? #92071
02/26/05 08:53 PM
02/26/05 08:53 PM
P
PCBelarge  Offline
Member
Joined: Jun 2003
Posts: 681
Dobbs Ferry, NY, USA
Read George's post - 230.6(4


Pierre Belarge

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