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 theyre 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.