QLD Electrical Licence case studies
QLD Electrical Licence · Put your knowledge to work in context.
The Queensland electrical licensing examination is the assessment step that sits between a candidate's trade training and the electrical work licence issued in Queensland. It is aimed at people who have completed (or are close to completing) an electrical apprenticeship or equivalent qualification and who now need to demonstrate, under exam conditions, that they can apply their knowledge to real installation decisions rather than simply recall it. The QLD Electrical Licence case studies are 5 cases and about 3,852 words.
1Submain to a detached workshop: volt drop, cable selection and earthing
A rural property near Gatton has a single-phase 240 V supply. The main switchboard is on the house; a detached workshop 120 m away is fed by a direct-buried submain of 6 mm² copper TPS (active, neutral and a 6 mm² earth), protected at the house by a 32 A MCB.
753 words, about 4 min22.5 mm² socket circuit under insulation, bundled, with a new 10 A heater
You are asked to certify alterations at a three-year-old house where the owner has added a 2.4 kW (10 A) convection heater to an existing 20 A general-purpose circuit. The circuit is 2.5 mm² two-core plus earth TPS on a 20 A RCBO, feeding 11 double socket outlets through the kitchen and laundry.
756 words, about 4 min3Unsupervised apprentice, live socket replacement and missing certification
A licensed electrical contractor sends a first-year apprentice alone to a rental unit to 'swap three GPOs and a light switch' while he attends another job across town. The apprentice has no test equipment, no lock and no written instructions.
724 words, about 4 min4Commissioning a workshop sub-board: interpreting test results and deciding whether to energise
You are commissioning a new 400 V three-phase sub-board in a workshop. The board feeds six circuits, including a 20 A single-phase Type C MCB supplying outdoor floodlights installed last week.
803 words, about 4 min5Live work justification on a 400 V board feeding critical refrigeration
A bakery has a 400 V three-phase main switchboard with a 250 A moulded-case main isolator. The only upstream supply is the site transformer, so opening the main isolator shuts down the refrigeration for the whole shop.
816 words, about 4 min