I see 309a and 442a electricians doing each others work all the time and no one cares.This trade is not regulated in ontario.The 309a is a compulsory trade however and you must have that license if you are in business for your self and even then you wont be stopped.An employer can hire a bum off the street and put him to work as an electrician if they deem them COMPETENT as stated in the Ontario Heath and Safety Act.Ford only hires 442a Chrysler only wants 309a and GM will take either so there is no difference.You get paid for the type of work you are doing not your ticket.For construction matainance you get around $49000 a year industrial gets $59000 average.This is from the Ontario job futures web site.I can post the link showing some of the identical job opportunities for both licenses if you wish.
cheers
