30A 125V Locking Receptacle. Product Features:. NEMA L5-30R. Marinco 3-Wire System. Glass-reinforced corrosion resistant nylon. Accepts up to 8 gauge stranded wire or up to 6 gauge with ring terminals. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.