Elliott Bay Marina has three units, one on each of three substations on "G" dock, monitoring about 25 boats per unit. When first installed, January 2003, leakage currents were initially 4-8 amps at each monitoring point. As faults were cleared alarm levels could be lowered. Substation with Marina Guard®     Current transformer around current carrying conductors at secondary of transformer - or service disconnect. A ground fault above the set point on the dock or on any connected yacht will trigger alarm. (click to enlarge) To continue reading more about Marina Guard click here