Class 2 circuit underground beneath parking lot

[nhee2]

Are there any exceptions/provisions that reduce the required cover on underground installation of a Class 2 or Class 3 circuit that is installed beneath a parking lot? I have looked through 725, and as best I can tell - the provisions of Table 300.5 still apply, and any Class 2 or 3, in conduit or direct-buried, needs to be 24" below grade.

Is there another section or exception that I am missing that would reduce this depth?

 

[tom baker]

See section 90.3
Do the rules in Article 725 reference burial depth?

 

[nhee2]

See section 90.3
Do the rules in Article 725 reference burial depth?

As stated in the original post - i've looked through 725 and did not see anything. But was posting to see if there might be some provision that wasn't obvious to me.

 

[hbiss]

No depth specified. I always go with Chapter 1 requirements though to protect against possible damage.

-Hal

 

[tom baker]

No depth specified. I always go with Chapter 1 requirements though to protect against possible damage.

-Hal

Exactly as most digging are expecting a 24” burial depth

 

[nhee2]

Ok. Thanks. That was my intent.

The wiring is ‘temporary’ meaning somewhere between 12 months and 12 years. There’s some pushback on applicability of table 300.5, which was the reason for the question.

 

[don_resqcapt19]

725.3 says only the requirements of Article 300 that are specifically referenced in Article 725 apply to those installations. 300.5 is not found in Article 725.

 

[hbiss]

The wiring is ‘temporary’

If you bury it in a slit from a garden edger like cable and phone installers do it becomes real temporary...

-Hal

 

[nhee2]

725.3 says only the requirements of Article 300 that are specifically referenced in Article 725 apply to those installations. 300.5 is not found in Article 725.

Note it is referenced for Class 1 circuits (725.46 says to install in accordace with Part I of Chapter 300). But not for the Class 2 and 3 circuits I was asking about.