For 100 years IBEW Local 40 has been powering Hollywood. More information can be found on their website. There are two main agreements:
Motion Picture “Blue Book” Agreement
Motion Picture Agreement between the Producers and IBEW Local 40, covering Electrical (electrical maintenance, refurbishment and construction electrical work, including generator operators and wind machines), HVAC (operation, construction & maintenance of heating, ventilating, air conditioning, boilers and on-set portable A/C) Sound Installation, Electronics when employed by motion picture studio or producer.
Inside Agreement
Inside Construction Agreement between IBEW Local 40, and LA County NECA covering all electrical work that is contracted out at the motion picture studios and all electrical work off studio lots related to the motion picture industry.