2005 NEC 352.10/300.5

Status
Not open for further replies.
jumper said:
Not always though, think crawl space under a dwelling. Conduit could lay on the ground.
Click to expand...
From a Plan Reviewers stand point a building would include all portions of the building from the roof of the structure to the footing of the structure.
 
VIC1958 said:
From a Plan Reviewers stand point a building would include all portions of the building from the roof of the structure to the footing of the structure.
Click to expand...
And from the NEC stand point 230.6 specifically spells out what is considered outside.

Roger
 
VIC1958 said:
From a Plan Reviewers stand point a building would include all portions of the building from the roof of the structure to the footing of the structure.
Click to expand...

Remember I said I could agree with you, but it is in a resi garage getting covered by concrete.

That pipe is not really subject to any heavy traffic. It is never gonna get damaged.

I hope this is just an academic question because no inspector is gonna say that job needs redone. Never happen.
 
roger said:
So what do you think he meant when he said this?



[/COLOR]Roger
Click to expand...

I know what he meant, and have tried to argue it in Jamaica... was still made to put the trench in and call the inspectors back out later... because the concrete was not done...

Inspector stated that too many do not do the concrete work after approvals given so they insist on full trench now, unless concrete work done.
 
Adamjamma said:
I know what he meant, and have tried to argue it in Jamaica... was still made to put the trench in and call the inspectors back out later... because the concrete was not done...

Inspector stated that too many do not do the concrete work after approvals given so they insist on full trench now, unless concrete work done.
Click to expand...

You do realize that in many other applications the pipe still has to be buried despite 4” of concrete going over it.
 
Adamjamma said:
I know what he meant, and have tried to argue it in Jamaica... was still made to put the trench in and call the inspectors back out later... because the concrete was not done...

Inspector stated that too many do not do the concrete work after approvals given so they insist on full trench now, unless concrete work done.
Click to expand...
If the project is not complete a final or CO will not be issued, this includes concrete.

In the OP's scenario there will be a concrete floor in the garage and 250.6 states if it is at least 2" thick the raceway is fine.

Does Jamaica use the NEC? Normally an inspector will do a Rough-In inspection and a Final, however on large projects they will make many trips for both and some finals make take days.

Roger
 
jumper said:
You do realize that in many other applications the pipe still has to be buried despite 4” of concrete going over it.
Click to expand...

but the depth of burial required changes by the fact you are placing it under concrete and some pipe can be buried in concrete as long as it is far enough inside the concrete... as long as it is direct burial rated... may not be up to date on all the US codes but know that you can put cable in conduits in concrete
 
Adamjamma said:
but the depth of burial required changes by the fact you are placing it under concrete and some pipe can be buried in concrete as long as it is far enough inside the concrete... as long as it is direct burial rated... may not be up to date on all the US codes but know that you can put cable in conduits in concrete
Click to expand...
I don't know what you are trying to say here but, if my installation is compliant with the NEC and there are no formal amendments then the NEC is the end of the story, if your inspectors are allowed to make up their own rules then you and others should try to change that.

Did you read 250.6?

Roger
 
Electrical inspections occur once usually and many times the structure is only partially finished, usually a couple of rooms or a floor, only, with water and windows and doors in place and steelwork waiting for next level sticking up on the current roof.

Inspectors hardly ever get called out for extra inspections although they should be, and sometimes you only see them for steel work checks before a cement pour is done or because they saw something different when they are driving by to approve someone elses foundation or decking formwork, or to do the required electrical inspection for the electric company... It is hard to see them other times as there are so few of them. The exceptions are apartments, and such, that they require to be checked electrically if vacant for more than 90 days with meter disconnected.

However, I became friends with the one inspector because of my plumbing-- rainwater, greywater, recycling, etc... and because he was a drinking buddy of my first electrical contractor. He is also friends with my brother in law... lol... but, friendship only goes so far..if I screw up, he makes me redo it ...
However, there are a lot of things required in the USA and that I am trying to learn to use and do in my work that is not yet required in Jamaica nor is it likely to be required very soon. They still have not put the laws into effect that they wrote in 2003 for new driver standards, and the law still reads that the national speed limit is 70kmh, but you are allowed to do 120kmh on the new motorways, except it is not in the motor vehicle code yet...
 
Adamjamma said:
but the depth of burial required changes by the fact you are placing it under concrete and some pipe can be buried in concrete as long as it is far enough inside the concrete... as long as it is direct burial rated... may not be up to date on all the US codes but know that you can put cable in conduits in concrete
Click to expand...

Yes, no, and maybe. Glance at the chart in 300.5.
 
Conductors that are considered as being outside a building (230.6):
  1. Beneath a building under not less than 2 in. of concrete or
  2. Beneath a building where installed in conduit and under not less than 18 in. of earth
  3. Within a building in a raceway encased in concrete or brick not less than 2 in. thick

So, if it is a conduit at least two inches under concrete at least two inches thick, it is covered? Or have I misread this> >
 
Adamjamma said:
Conductors that are considered as being outside a building (230.6):
  1. Beneath a building under not less than 2 in. of concrete or
  2. Beneath a building where installed in conduit and under not less than 18 in. of earth
  3. Within a building in a raceway encased in concrete or brick not less than 2 in. thick

So, if it is a conduit at least two inches under concrete at least two inches thick, it is covered? Or have I misread this> >
Click to expand...

Correct for beneath a building concerning services conductors.

Here is 300.5

table3005.jpg
 
Adamjamma said:
Conductors that are considered as being outside a building (230.6):
  1. Beneath a building under not less than 2 in. of concrete or
  2. Beneath a building where installed in conduit and under not less than 18 in. of earth
  3. Within a building in a raceway encased in concrete or brick not less than 2 in. thick

So, if it is a conduit at least two inches under concrete at least two inches thick, it is covered? Or have I misread this> >
Click to expand...

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
 
roger said:
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
Click to expand...

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...
 
Status
Not open for further replies.
Top