Cross linked polyethylene insulation recommended.

Waytek TXL Wire 20GA Orange Waytek TXL Wire 20GA Blue

Twisted Shielded Cable For knock/VR/CAN

22 AWG x2 Shielded Cable M27500-22SB2T23

PVC insulation like UL1007-20AWG acceptable but second choice.

https://www.powerstream.com/Wire_Size.htm