This adapter will let you plug in your welder or other appliance that has a NEMA 6-50 plug, to your NEMA 6-30 outlet. This 18 inch adapter cord is fully molded at both ends and made with extra-thick 8 AWG pure copper conductors for maximum power delivery. It is the simple solution – just plug it in and start using your welder right away. Note: This adapter is built to handle over 40 amps, but your circuit may be limited to 30A – so please do not exceed 30 amps or 7200 watts when using this adapter.