Reuben Barnes, 16, was electrocuted while installing fibreglass insulation in a Stanwell home, near Rockhampton in central Queensland, on November 18, 2009.
He was one of four people who died during the rollout of the federal government's multi-billion-dollar home insulation program, which was also blamed for almost 100 house fires.
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Arrow Property Maintenance Pty Ltd was charged in the Rockhampton Industrial Magistrates Court with failing to conduct its business or undertaking it in a way that was electrically safe, and failing to ensure its workers were protected from falls from height.
Queensland's Department of Justice and Attorney-General laid the charges following an investigation by the Electrical Safety Office and Workplace Health and Safety Queensland.
Rockhampton industrial magistrate John McGrath received the plea on Tuesday and has reserved his judgment to 4pm (AEST) on Friday.
The case of the death of another insulation installer, Matthew Fuller, 24, is due back in Beenleigh Industrial Magistrates Court on October 1.
Investigations into the deaths of installer Mitchell Sweeney, 22, in February this year and Marcus Wilson, 19, in November 2009 are ongoing.
