Wiring Devices Qualtek Electronics Wiring Devices comply with international safety agency regulations that ensure safe and durable products. Qualtek Electronics Wiring Devices include plugs, receptacles, and connectors that meet the NEMA 5-15, NEMA 5-20, NEMA 6-15, NEMA 6-20, NEMA L5-15P, and NEMA L6-15P regulations.