Blue Sea Systems 3118 SMS Surface Mount System 120V 50A ELCI Main + 2 Circuits

Circuit Breaker Specifications
Voltage Per Pole: 120V AC
Amperage: 50A AC
Poles: 2
Circuit Breaker Type: Magnetic Hydraulic - trip free
Interrupt Capacity 5000A
Leakage Trip Amps: 30mA
Switching Cycles: 10,000
Ring Terminal Size: 1/4in
Circuit Breaker Format: Carling C Series Flat Rocker
Ignition Protected: Yes, UL 1500

SMS Panel Specifications
Circuit Breaker Positions: 6
ELCI Positions: 4
Open Positions: 2
Circuit Breaker Mounting Screw Size: #6
LEDs Included: 3 green, 1 red
Wire glands Included: 2 PG7 (14-10AWG Single), 1 PG16 (14-10 AWG Triplex), 2 PG29 (#6 4 conductor)
Ingress Protection: IP66 - Water Resistant against powerful jets
ROHS, UL 508

ELCI Pre-mounted in SMS Box
Mounting Holes: 4
Mounting Screw: 1/4in, #12, 6mm

ELCI (Electrical Leakage Circuit Interrupter) is a life saving safety device for any boat with AC devices on board. The ELCI is a circuit breaker that is installed between the shorepower inlet and the main AC panel. (To be exact ABYC requires ELCIs be installed no more than 10 feet from the shorepower inlet). ELCIs monitor the amperage difference from the hot wire and the neutral wire. If the difference is over 30mA the ELCI will disconnect AC power from the boat. This difference implies that leakage current is traveling through the ground wire, which is connected to underwater metals. When current travels through underwater metals it is traveling back to the shorepower pedestal through the water. Electrical current in the water has injured and killed swimmers. This is why ELCIs are a mandatory device from ABYC.

The SMS box with an ELCI circuit breaker inside is a perfect paring. With the SMS box being surface mountable and IPP 66 water resistant, you have versatility of mounting locations to satisfy the ABYC 10 foot requirement. This combo allows you to easily protect your boat and the surrounding water from stray electrical current.