ECN Forum Forums General Topics of the Trade General Discussion Area parking lot burial depth

I have a job in a parking lot that is asvaulted . they want a another light put on that circuit. so i cut the asvault dug down about 10" ran ridged pipe and also ran it up the base of the light where i was going to get power and lb into the side of the pole light. now i though i was doing it to code 300-5 where it said if covered by 2 in concrete or equivelnt min. 6 " . but it also a section that says parkinglot min berial 24 " i am under the thought that that is unpaved ...any thought ?

Thought...
300.5
6" , min. In trench below 2-in thick concrete or (((equivalent))).
Point is.
Pavement is not (((equivalent)) to concrete.
CONCRETE:A hard, strong construction material consisting of sand, conglomerate gravel, pebbles, broken stone, or slag in a mortar or cement matrix.
ASPHALT: 1. A brownish-black solid or semisolid mixture of bitumens obtained from native deposits or as a petroleum byproduct, used in paving, roofing, and waterproofing. 2. Mixed asphalt and crushed stone gravel or sand, used for paving or roofing.

ok .... then what would be equivelent to concrete ...... by the way the inspector made me due just that 2" of concrete but i really thought i was right ....so what would be equvilent to concrete ?

Anything that would withstand the same force of pressure per foot. Asphalt can not do this. Have you seen a large truck drive over asphalt and make a indention into the asphalt, If it was concrete the large truck would not have the same effect.