TERMINAL BOXES, CONNECTION, SUBMERSIBLE (15-FOOT), 500 VOLTS, THREE-PHASE, SYMBOL NO. 418.1 - SIX BUS LUGS FOR TWO 3-CONDUCTOR 250 MCM CABLES, SYMBOL NO. 418.2 - SIX BUS LUGS FOR TWO 3-CONDUCTOR 300 MCM CABLES, SYMBOL NO. 418.3 - SIX BUS LUGS FOR TWO 3-C