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 SR-955HPC Setup Guide Can I upload music for a Roger beep or can I only use tones for it? When I Transmit my the display shows my Voltage Drops What are the dimensions of the 655 & 955? Comments 0 comments Article is closed for comments.