Minimum power wire size? 8 or 10 ga? Shawn August 01, 2017 15:58 10 gauge wire is sufficient for any of our radios. Related articles Will my factory power hookups handle this 447HPC2 or would a cigarette lighter plug work better. : Can you explain the proper operation of the ASQ option on the 447HPC2? If ASQ is active, does the squelch control need to be adjusted, and if not, at what signal level does it open? What fuse do I need for the SR-955HPC? When I talk into the mic it makes all of the gauges on the dash go haywire. How can I turn on the Roger beep? Comments 0 comments Article is closed for comments.