POWER_PIG
Senior Member
Just finished taking the thompson prometric Master exam #20112 here in Brevard County Florida. Just to give a "heads up" to anyone that cares to know, It was much more difficult than I thought it would be. I took the Mike Holt on-line version of the simulated Master/Contractor exam after studying his material since last November and did quite well. In those studies I was made to believe that I would only deal with parts and pieces of service feeder calculations, whether it be single dwelling, multi-family or commercial. I understood that calculating the whole service from start to finish would not be expected of me. I was in utter shock when I was asked to calcualate a single family dwelling from start to finish, and a 16 unit apt complex service feeder and neutral..(laundry not on premises and do not use the optional method) One question really surprised me...they want to know the secondary available fault of a 75 kva fully loaded single phase transformer ...impedance = .02 ohms......Im not sure how to turn resistance from ohms to a pecentage for that calculation. If they are going back to "old school" calcualations, I think they should increase the time limit to at least 6 hours, with a pee break included ( for cryin out loud) Im still trying to find a "look up" about how thick sealing compound must be in a 1/2 " rigid seal-off. Im pretty sure I tanked it, but I'll be back in a month or so, hopefully much better prepared.