Cam-Lok

Originally trademarked by Empire Products of Cincinnati (bought by Crouse-Hinds, now Cooper), the series E1016 is the industry standard for single pole high amperage connectors. E1016s are rated up to 400A. The E1015 series, rated up to 100A are often called "baby Cams." Many companies make compatible connectors. Leviton is one. The author prefers Advanced Devices, for their ease of assembly and repair.

The National Electrical Code requires that these connectors (and indeed all single-conductor cables) be used only by a Qualified Person.

For 120/208VAC operation, the colors and uses are
Green=Ground
White=Neutral
Black=Phase A
Red=Phase B
Blue=Phase C
While they should not be made or broken live, the connectors should always be plugged in in the above order, and unplugged via the reverse.

Seldom seen in the theatre, the colors and uses for 277/480VAC are
Green=Ground
White=Neutral
Brown=Phase A
Orange=Phase B
Yellow=Phase C
While they should not be made or broken live, the connectors should always be plugged in in the above order, and unplugged via the reverse.