90 - Electric Shock

The 4th year apprentice and tradesperson had started their day together on site and had completed a site specific risk assessment. The apprentice was then tasked with installing flexible duct for an exhaust fan where the ceiling had been removed ahead of the reinstallation of the ceiling. The tradesperson left the apprentice alone on site to complete this task (broad supervision) but did not ensure that the site was fully de-energised. The site was a domestic dwelling (house) that is being converted into a commercial premise. Selected circuits had been left energised to provide site power for the various trades working on the site.

The apprentice went ahead with the task, working through the open ceiling off a fibreglass ladder with electrical cables clipped to the beams around them. The apprentice had not checked the cables around his work area with his volt stick. Additionally, he had not carried out a lock out tag out procedure, as he and his tradesperson had deemed the work to be non-electrical.

The apprentice was installing the ducting into the small section of the roof when the duct made contact with an unterminated, energised cable hanging from the ceiling joists behind him. This caused the duct itself to become live and give the apprentice an electric shock through his hands, which were holding the ducting.

Root Cause

1. Job/System Factors:

2. Personal Factors:

Contributing Factors

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