Leviton offers a large selection of 15, 20, 30 and 50 amp commercial grade straight blade plugs and connectors, available in a wide variety of features. These rugged performers are moisture, chemical and abuse-resistant and they?re ideal for indoor and outdoor use. the EPTR rubber-backed plugs and connectors stand up to rough use, protecting against dirt and moisture. The deep slotted, backed out terminal screws draw backwire clamps securely over stripped leads for maximum conductivity.