Underground installations

[sparky984]

It seems that underground installations for commercial projects from the utilty source to the first means of disconnect are always in conduit. Is this a code requirement? I have looked in article 300 and don't find this. Or is this a specification from the owner/electrical engineer?

 

[mcclary's electrical]

not around here. Alot is direct buried

 

[rcarroll]

Or is this a specification from the owner/electrical engineer?

Most likely

 

[raider1]

There is not an NEC requirement that service lateral conductors be installed in a raceway underground.

Take a look at 230.32 for the requirements for protecting service lateral conductors from physical damage.

Chris

 

[sparky984]

Underground installations

Thanks for the replies.

 

[jumper]

Same here as Mcclary said.

 

[RJH333]

Underground Conduits

Underground Conduits

What are the depth requirements when running conduits under a building and in a slab of concrete weather in the slab on grade or in a tin pan deck. The first floor, and second floor are for parking.

 

[K8MHZ]

I just got the scoop.

This is Consumer's policy:

If they do all the work to connect the meter, they will use direct burial.

If you want to do your own trenching, they require a 4 inch conduit from pole to meter. They still pull in and connect.

 

[mcclary's electrical]

What are the depth requirements when running conduits under a building and in a slab of concrete weather in the slab on grade or in a tin pan deck. The first floor, and second floor are for parking.

You would have to ask the local POCO, as their requirements exceed NEC