K-LOK 400A Blue Connectors

Blue K-LOK 400A connectors identify Line 3 (L3) in North American 120/208V systems and in legacy Australian/New Zealand installations. Under the IEC 60446 standard used across Europe, the UK, and modern Australia, blue designates the neutral conductor. This dual role means blue connectors are present on virtually every three-phase power distribution system worldwide, whether carrying a phase line or the neutral return. Given the 400A rating, blue K-LOK connectors are commonly found on main feeder runs, generator tie-ins, and switchgear interconnects. All configurations share the same 400A/600V specification with brass contacts and Santoprene body. Available as line connectors, panel mount receptacles, double set screw panel receptacles, and threaded stud panel receptacles.

What Does Blue Identify?