On a film set, this title is for the first assistant to the head electrician
[DOC] [TLE] Film crew - Wikipedia [PAR] A movie crew is a group of people hired by a production company for the purpose 
of producing .... First assistant director: The first assistant director (1st AD) assists 
the .... Their main responsibility is to work closely with the electrical department to 
put in the non-electrical components of lighting set-ups required for a shot, such... [DOC] [TLE] Gaffer (filmmaking) - Wikipedia [PAR] A gaffer in the motion picture industry and on a television crew is the head 
electrician, responsible for the execution (and sometimes the design) of the 
lighting plan for a production.