Terminal box, connection, 200 terminal, 800 wire, 600 volts, 30 amps per terminal, submersible (SBM-15), non-magnetic. Consists of (10) Type 4TB20 terminal boards mounted on brackets within a 20 x 24 x 5-3/8" deep brass enclosure assembly per MIL-E-24142/7. The removable cover is gasketed to provide submergence to a depth of 15 feet. Cable entrance is made by the installing activity through the side walls of the enclosure via stuffing tubes to maintain the enclosure effectiveness. Terminal lugs for connection to the terminal boards should have an L80 tongue shape. Symbol 452 per MIL-DTL-24558/15. NSN 5940-01-167-3894. See Symbol 454 for a similar item with more terminals.