Blue Sea Systems 12 Circuit with Negative Bus with Cover Features: Positive distribution bus with #10-32 stud Can be used for 24-hour circuits Cover satisfies ABYC/USCG requirements for insulation, incorporates an easy to open push button latch providing easy access to fuses, storage for two spare fuses, and label recesses that accept Blue Sea Systems' Small Format Labels for circuit identification Fuse blocks with covers include 20 write-on circuit labels Tin-plated copper buses and fuse clips Accepts ring or spade type terminals Accepts ATO and ATC fast acting blade fuses Fuses sold separately Voltage Maximum Operating - 32V DC Amperage Maximum Operating (per circuit)- 30 Amps Amperage Maximum Operating (per block) - 100 Amps