Standard electrical connector used for high-current power distribution in film production lighting systems.
Technical Details
The standard Bates connector operates with three phases at 120 volts and a maximum current of 100 amperes. The rectangular contacts measure 19 × 6.35 mm and are positioned in a characteristic triangular arrangement. The system uses color-coded insulation: black for Phase 1, red for Phase 2, blue for Phase 3. Mini-Bates connectors handle 60 amperes at the same voltage and are used for medium lighting loads. The gold-plated copper contacts ensure consistently low contact resistance even after hundreds of mating cycles.
History & Development
In 1943, Bates Manufacturing introduced the first high-current connector for Hollywood studios following increasing safety concerns with improvised power connections. RKO Pictures first tested the system in 1944 during the production of "It's a Wonderful Life" directed by Frank Capra. In the 1960s, the Bates standard became established industry-wide after the IATSE union mandated its use for productions exceeding certain lighting budgets. Since the 1980s, CEE connectors (Mennekes) have complemented the Bates standard, while LED technology has reduced overall power demand.
Practical Use in Film
Large tungsten lights such as 10K or 20K Fresnel spots require Bates connectors for sufficient power supply. In "Blade Runner 2049" (2017), DoP Roger Deakins used over 200 Bates connections for the practical neon installations in the cityscapes. A typical workflow involves the gaffer planning power distribution via Bates splitter boxes, which divide a main feed into multiple individual circuits. The robust locking mechanism prevents accidental disconnection during camera movements, while the high current capacity allows for flicker-free dimming.
Comparison & Alternatives
CEE connectors (IEC 60309) offer similar performance ratings with international standardization and are more common in Europe than Bates systems. Neutrik's PowerCON connectors handle lower currents (20A) more elegantly for modern LED panels. Socapex multicore cables bundle multiple circuits into a single cable run, whereas Bates systems require individual cables. Camlock connectors surpass Bates for extreme current loads above 100 amperes but are more cumbersome for daily use.