underground circuit

[puckman]

(in n.j. a one family's backyard). i would like to put to a 20amp circuit on the other side of a concrete pad 4" thick in the back yard. there is a unused 1.5 " pvc plumming pipe under the concrete and goes from one side to the other side. can i use this as means of a wire way for uf cable? or can i install a 1/2" pvc conduit inside the 1.5"?for my gfi outlet.

[bphgravity]

I feel either method you suggest should be fine as long the existing PVC's sole purpose remains a sleeve.

[bkludecke]

I agree. The 1 1/2 sleeve is just that, I would however wonder if the depth below grade is adequate. You may need to shove rigid steel or IMC thru the sleeve to satisfy the NEC.

Bob on the left coast.