Safely powers 50 Amp 125-Volt/250-Volt boat from two 30 Amp 125-Volt receptacles at dockside. 4-pole contactor breaks both hots and both neutrals to prevent possible live plug when not engaged. UV resistant housing, 30 Amp plug that connects to 30 Amp shore power, safety indicator light, internal cord clamps, sealing grommets, anti-fog-rain-humidity environmental seal, 50 Amp connector body that mates with boat cord set and plugs. Shuts off power if improper wiring condition exists on power center or if 1 plug is not fully engaged. Senses polarity of 30 Amp receptacle on dock and two 30 Amp receptacles from opposite phases. Note: The YQ230 Adapter will only work with two 30 Amp receptacles that are on different phases. Not CSA Approved.