I think it would be too expensive, just stick to rubber.
Rubber - Find Rubber Tree > make rubber tap using a small amount of wood > harvest rubber > cook > Insulate wires.
Plastic - Find oil deposit > make pump, waterproof pipes, power supply, tanks, buckets > collect oil and pump into tanks > transfer from tanks into buckets > cook > insulate wires.
Now, which one would you rather do? Something quick that requires 5 wooden planks, or something that requires plenty of materials and time.