2005 NEC 352.10/300.5

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now you really have me confused... is it 18 inches or 2 inches of concrete? I mean... lol..I am wondering if I am just getting more confused the more I learn... because the table seems to say that because cars drive on it, you need 18 inches, even though it has concrete...

The problem is some want to call the garage floor a driveway but it's inside the foot print of the building and article 100 describes a garage as a building or part of a building, not a driveway.

Roger
 
The problem is some want to call the garage floor a driveway but it's inside the foot print of the building and article 100 describes a garage as a building or part of a building, not a driveway.

Roger

Well, at least I am learning something here... even if a lot of others are probably laughing over how stupid I seem to be..lol
 
Well, at least I am learning something here... even if a lot of others are probably laughing over how stupid I seem to be..lol

Is that why one of these showed up in one of my unidentifiable personal messages? :lol:

JAP>
 
Even though the OP didn't answer my question in post # 15, from his original discription it appears as though he is describing service entrance conductors and not a feeder so 230.6 (1) is correct.

Roger
I apologize for not responding to post # 15, the conductors in question would be considered feeders.
 
I apologize for not responding to post # 15, the conductors in question would be considered feeders.
So you're saying the meter can has a main breaker in it?

Regardless, it is under a building by article 100 definition so column 3 of Table 5 says 0.

To take it a little further, row 6 of Table 5 specifically addresses "dwelling driveways and outdoor parking areas" if a garage were to be treated the same it would be included.

Roger
 
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Zero, 0, no burial depth required because the conduit is UNDER a BUILDING. Therefore, this would be a code compliant installation.

Now forget about the code and how about some common sense. A driveway or roadway has moving traffic on it and exposed to the elements of water drainage and for some, freeze thaw. This has a lot of vibration and more movement than inside a garage where you pull in and stop and since you are UNDER a BUILDING, you are relatively safe from the weather with more stable soils.

As much as some of you and probably me would like to see it buried more than the depth of the sub-base, we simply cannot make up our own rules. The definitions in the NEC are very clear and concise. You can't make a garage slab a driveway because it is already defined by the word building.
 
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