This AC WORKS brand locking adapter is a very durable molded adapter.. Adapter L5-30P to L14-30R Hots Bridged 30A 125V to 30A 125/250V It features nickel-plated terminals and plugs to prevent rusting and has a maximum operating power of 3750W. The NEMA L14-30R is a 30 Amp, 125/250 Volt, 4-prong female connector.