Underground cable question.

[72Camaro]

We had a box installed on the outside of the shop to give power to a pond pump some exterior lights. Right now that box is capped as are the wires in it. I need to bury cable/wires underground for about for about 25 feet to get them where I need the plugs for the pump and light.

How deep do I need to go? I have sprinkler and underground drains in the way. And does it need to be in conduit? I’ll be burying this by hand with a manual trench tool

 

[wyliesdiesels]

I would do 24" and yes use conduit.

What gauge wire do you have and what is the amp rating on the breaker?

 

[72Camaro]

I would do 24" and yes use conduit.

What gauge wire do you have and what is the amp rating on the breaker?

20amp. Don’t have wire yet

 

[pattenp]

GFCI protected at source at no more than 20A at120V you can use UF-b direct buried with at least 12 inches of cover.

 

[Norcal]

GFCI protected at source at no more than 20A at120V you can use UF-b direct buried with at least 12 inches of cover.

Only if residential.

 

[72Camaro]

This is what I figured. Thanks guys

 

[555]

In my home town it was 18" for years but in 2018 they changed it to 30" with sand bedding. GFCI protected all in conduit and no more direct burial wire. A home owner can still do the installation but the location has to be mapped and a copy provided to the city.