I am installing a lamp post in my front yard. I already have electrical ran
to the outside that was used for a lamp post many years ago (previous
owners). They ran the cable not in conduit underground about 6 inches at
most. I am going to put a new lamp post in and I was thinking that the
electrical cable should be in a conduit. The existing cable is underground
rated (or so it says on it). Thoughts on the conduit. Also, in the trench
would you lay gravel or sand? Any general advise anyone can offer? Tips,
tricks, or advise from experience?

Thanks
Amy.