Sierra L5-30P Y Adapter 30A 125V This 30A L5-30P Y Adapter is easy to apply and ideal for severe marine environments. The two boat inlets of similar or different power configurations can split a dockside receptacle between them by using the Y adapter. The adapter features a sealing ring watertight secure connection to shore power. It also includes a yellow PCV cord jacket for high resistance of carbon tracking. This adapter facilitates 30A 125V Male locking to 2 30A 125V female locking adapters.