High-current single-pole plugs and receptacles make temporary power connections in high-amperage applications. Also known as single-pole devices, they have keyed features to prevent mismatched connections and locking mechanisms to stop unintended disconnections. Their insulated constructions cover their contacts to deter touch with live currents, protect against impacts and abrasion, and seal out contaminants. Plugs attach to cables and have terminals that insert into connectors and receptacles. Connectors secure to cables and have socket openings that accept plugs. Receptacles mount on surfaces to disperse power. Tees and 3-Fers tap into existing connections to create circuits. Distribution blocks split power from single power cables into multiple outgoing connections. Gender-reversing devices convert plugs or connectors into the opposite connection type.