Marine Shore Power Adapter Cable 50-Amp to 30 Amp Nema SS2-50P to L5-30R, Marine-50Amp 125/250V SS2-50 Male to L5-30 125 Volt 30Amp-Shore Power Female Converter, 50A to 30A Twist Lock Adapter, 1.5FT. 50 amp to 30 amp marine shore power adapter cord, twist lock Nema 50 Amp,125/250 Volt SS2-50P Male Marine Shore plug to 30 Amp,125 Volt L5-30R female boat shore power adapter.