From the https://www.iuec.org/wp-content/uploads/2017-2022-NEBA-AGREEMENT-web.pd f" target="_blank">NEBA Agreement:
"Article X
Par. 2. The total number of Helpers, Apprentices and Assistant Mechanics employed shall not exceed the number of Mechanics on any one job, except on jobs where two teams or more are working, one extra Helper, Apprentice or Assistant Mechanic may be employed for the first two teams and an extra Helper,Apprentice or Assistant Mechanic for each additional three teams.Further, the Company may use as many Helpers, Apprentices and Assistant Mechanics as best suits his convenience under the direction of a Mechanic in wrecking old plants and in handling and hoisting material, and on foundation work. When removing old and installing new cables on existing elevator installations, the Company may use two Helpers, Apprentices or Assistant Mechanics to one Mechanic."
Rule of thumb: One Mechanic One Helper.
I’m only going off what a mechanic that’s also a teacher told me not trying to spread miss information