The best way would be to use rigid PVC conduit for electrical installations. Glue the joints well so that no water can penetrate. As an additional protection the conduit can be embedded in concrete. If this route is chosen, have at least three inches of concrete surround the conduit. Using cinder building blocks on their side and feeding the conduit through them will stop the conduit from floating to the surface when the concrete is poured. Using a form along side the cinder block's ends will save on concrete. The forms can be stripped when the concrete sets up or can be left in place and just buried.
It may be easier to simply cut out the section of conduit and replace it.
If you are talking about the primary wires to the transformer then yes they have to be encased in concrete.
The noun 'kind' is an abstract noun. There is no form for kind that is a concrete noun.
A conduit run is already-installed conduit.
offset bends.
offset bends.
Concrete
concrete
A 770 Greenlee hydraulic pipe bender bend is used for rigid steel conduit from 2" to 4".
For underground conduit runs, PVC is by far the better of the two conduit systems.
reenforced concrete