English to French Bus/Financial Energy / Power Generation safety workshop

Crew Changing Light Bulbs Scenario
A three person crew was assigned to drive a company vehicle to a local substation to inspect the lighting in the ***switch house building*** and change light bulbs as necessary.
The light fixtures are all located in the switch house building.
The crew consisted of a foreman (master electrician) a helper (apprentice electrician) and a driver.
The distance from the workshop, where the crew originated and the substation, was approximately four miles.