TriCore Safety toolbox talk · tricoresafety.com/toolbox-talks
Lockout/tagout
Lockout/tagout is the most reliable way to keep people from getting hurt by live or stored energy. Incidents happen when someone assumes equipment is off instead of proving it. Panels, breakers, MCCs, HVAC units and conveyors all get isolated, locked, tagged and tested with a meter before work starts.
Don't go by someone's word or a label that should be right. On a construction site the rules are in OSHA 1926.417 and NFPA 70E.
Cords, temporary power and GFCIs
Plenty of jobsite shocks come from everyday cords, tools and temporary power, not high-voltage gear. Damaged insulation, missing grounds, water and overloaded circuits are the usual causes.
Inspect cords every day, keep them out of water and out of pinch points, and run them through a working GFCI. Temporary power needs real panels, breakers and weather protection instead of a spiderweb of cords.
Working near energized equipment
Arc flash happens in an instant, often during troubleshooting, panel removal or work too close to live parts. Respect the approach boundaries, read the arc-flash labels, and don't assume a panel is safe because it looks off.
Only qualified workers in arc-rated PPE open energized gear. Everyone else keeps their distance.
Damaged equipment and grounding
Electrical problems usually give warning signs. Buzzing panels, warm breakers, exposed conductors, taped-over damage, missing strain reliefs, a tool that shocks a little. None of them get ignored.
Damaged equipment comes out of service, gets tagged and gets replaced. Check grounding as part of routine inspections, especially on wet, muddy or steel-heavy sites.