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 Interference from the flashing lights on my vehicle? SR-955HPC Setup Guide : 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? Fuse size (amps) for SR-497HPC? When I talk into the mic it makes all of the gauges on the dash go haywire. Comments 0 comments Article is closed for comments.