What is a primary concern when setting up scaffolding near electrical sources?

When setting up scaffolding near electrical sources, a primary concern is grounding and insulating the scaffolding materials. This is crucial because scaffolding is often constructed from metal, which is a good conductor of electricity. If the scaffolding is not properly grounded or insulated, there is a significant risk of electrical shock to workers, particularly if the scaffolding comes into contact with live electrical wires. Grounding helps safely redirect any stray electrical currents into the ground, while insulation prevents the flow of electricity through the scaffold structure. This practice is essential for ensuring the safety of workers and compliance with safety regulations in environments where electricity is present.