Fuse box, feeder junction, submersible to 15 feet, non-magnetic, 250 VAC, single phase, 0 - 30 amp fuses. Provides for feed-thru of up to 75 MCM cable and single phase branch circuit of up to 14 MCM cable. Consists of bus bars secured to an insulator within a 6x9x4-1/2" deep brass enclosure. Compression type terminals are brazed to the bus bars to accept the cables. Type FC21CF fuse clips separate the main buses from the branch buses and accommodate type F09 fuses. Symbol 685.1, Military Part Number M24646/15-001 per MIL-DTL-24646/15A and MIL-DTL-24646A. NSN 5920-00-284-7122. Similar to Symbol 686.1 except the branch circuit is sized for up to 40 MCM cable and it accommodates fuses rated 31 - 60 amps.