Trench depth for conduits

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clay56

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What is the proper trench depth for conduits? I thought it was 18" below grade for low voltage and 24" for high voltage. I received a correspondence for someone talking about 18" below rough grade and 24" below top of rock or pavement.
 
Re: Trench depth for conduits

it may be that the local POCO has their own set of specs. my district requires 30" burial depth for underground service conduits.
 
Re: Trench depth for conduits

The ditch will always be two times one half the depth. :p

36 inches is the required depth for PGE service conduits, in Oregon.
 
Re: Trench depth for conduits

Bennie, you are weird. Didn't you know that the ditch will always be four times one quarter of the depth? :D
 
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