Pin-and-sleeve wiring devices securely seal power
connections by interlocking a ground pin with a keyway on the outside of
a plug. Because of this configuration, they provide reliable
connections; prevent accidental disconnect under load; ensure
high-strength durability; and insulate power delivery from moisture,
chemicals, and other harsh environments.
may be designated as plugs (male cord-end connectors), connectors
(female cord-end connectors), inlets (male panel or back box–mounted
plugs), receptacles (female panel or back box–mounted connectors), and
mechanically interlocked receptacles (designed to prevent the insertion
or removal of the plug from the receptacle while powered).
prevent shorting between conductors, wiring terminations may have
funneled channels to allow easy insertion and separation of wires.
Members develop NEMA Standards and monitor international Standards that aid in market development.