PVC Demonstration System
The above figure is a PVC pipe with a wire pair attached to simulate a PVC pipe that has been co-extruded with a wire pair.

Above image is the end of PVC pipe with embedded wires, and with electrically conducting nails inserted into wires.
Wires are cut to be offset from end of pipe so as not to interfere with the water seal gasket at end of pipe.

Above image is a PVC coupler with added electrical connector sockets with attached wires.

The figure below is a closeup of the electrical sockets.



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