MTTC Electrical Trade Test case studies
MTTC Electrical Trade Test · Put your knowledge to work in context.
The MTTC Electrical Trade Test is a Michigan certification assessment for people who want to teach electrical trades in the state's career and technical education system. Candidates are typically working electricians, apprenticeship instructors, or career-changers with field experience who need to demonstrate both technical command of the trade and the ability to teach it. The MTTC Electrical Trade Test case studies are 5 cases and about 2,108 words.
1Lockout, Verification, and the Energized Panel Decision
A journeyman electrician arrives at a commercial kitchen remodel to add a 30 A circuit for a convection oven. The panel is a 42-space, 208Y/120 V three-phase load center mounted in a utility corridor.
515 words, about 3 min2Voltage Drop on a Long Barn Feeder
A rural client wants a 100 A subpanel in a detached barn 260 ft from the house service. The load is a 5 hp, 230 V single-phase irrigation pump motor plus lighting and a welder outlet.
437 words, about 2 min3Derating a Crowded Conduit in a Hot Mechanical Room
A crew is pulling ten current-carrying 12 AWG THHN copper conductors and four equipment grounding conductors through a 1 in. long between a junction box and a panel in a mechanical room that reaches 110 degrees F in summer.
408 words, about 2 min4Motor Circuit Protection Tripping on Start
A 15 hp, 460 V three-phase conveyor motor trips its branch circuit protector about one start in five. The motor nameplate shows 21 A full load.
378 words, about 2 min5Teaching Effective Lockout and Verification in a Lab
An instructor is planning a 3-hour lab for eight apprentices on de-energizing and verifying a motor control panel. The lab has two de-energized training panels, one energized demonstration panel behind a barrier, and a limited supply of rated testers.
370 words, about 2 min