Yellow K-LOK 400A connectors designate Line 3 (L3) in North American 277/480V high-voltage systems, completing the brown-orange-yellow phase color scheme mandated by NEC for the higher voltage tier. Under China's GB 50303 standard, yellow identifies Line 1 (L1). In entertainment and industrial applications, yellow 400A connectors are most commonly seen on 480V utility tie-ins, large generator paralleling setups, and permanent facility power where the electrical system operates above the standard 120/208V entertainment voltage. All K-LOK 400A yellow connectors carry the full 400A/600V specification with high-conductivity brass contacts, Santoprene body rated to 105°C, and POM retaining screw. Available in line connector, panel mount receptacle, double set screw, and threaded stud panel receptacle styles.
Region / Standard | Color | Designation |
|---|---|---|
NA 277/480V | L3 (Line 3) | |
China | L1 (Line 1) |
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