On Fri, 5 Jun 2020 16:48:31 -0700, Bob F wrote:

On 6/5/2020 7:06 AM, Todesco wrote:
On 6/5/2020 8:14 AM, Todesco wrote:
On 6/3/2020 3:45 PM, Todesco wrote:
10 years ago I installed a post lamp in the front of my property.
The house builder left a 2" plastic conduit (maybe 100 feet) from the
house to the area where the post light was to be installed.* I put a
4" square plastic box at each end of the conduit as ground level.
The house end is no problem as it is in the asphalt driveway.* At the
house end, I connected an underground "romex" to a breaker on the
panel.* At the other end, I connected 2 underground "romex", one to
the post light and one to an outlet, some 25' away.* Through the
years, the outside box has disappeared and I can't find it.* I've
tried raking up the leaf mulch. Nope.* I've also tried one of the non
touch voltage testers.* Nope. I've tried a tracing unit connecting a
signal to the power line and snooping with the other end.* Nope!** I
don't have a metal detector. Not sure where to go from here.* Any
great ideas out there?
Here's an update.* When I built the house I took tons of pics.* I
didn't remember taking pics of the orange plastic conduit, but
actually, I did. **The pictures helped a bit.* Haven't found it yet,
but I feel I'm closer.* Originally, I was looking in a different
spot.* It's amazing how much growth occurred in 10 years.* Yesterday I
put my signal unit on the turned off lamp post outlet.* I can trace it
even to the 2nd outlet some 25' away without even getting right on
that outlet.* But in the ground there seems to be lots of attenuation
(ground).* I was getting close in a big patch of some "weedy flowers"
but had to give up as my back couldn't take any more (recent back
surgery).* Today it's supposed to rain all day, so it will have to wait.

BTW, this all started out when the GCFI on this circuit started tripping
randomly.* It's a new GCFI in the panel.* The power comes from the panel
and goes to a J-box next to the panel, where there is an X10 module to
power up the run going to the post light and 2 duplex outlets.* The run
from the house to the area where the light and outlets are located, is
about 150'.* So, when the post light is off, the neutral is still
connected to the 150' run, but, of course, not the hot lead.* I am
wondering if this unbalance might be causing the GCFI tripage?* I'm
guessing here, but it seems the GCFI trips at about the same time as the
X10 switch turns on.

That suggest leakage to ground, which might be found using the meter trick.

Next time, stick a piece of rebar where you bury the box.

Or bolt the box to something like a plough colter or a cultivator
disk - find it from 3 feet away with a metal detector even 50 years
down the road.