You'll be off work of any sort for months. You will never regain the full use of your hands, so you may not be able to work as an electrician again. None of this would have happened if you had assessed the risks and deenergised the switchboard before you started work. If you had been wearing the correct arc-rated protective clothing, it could have prevented the arc flash from setting your clothes on fire. Your front and back were badly burnt, with second degree burns across your chest from the initial blast, as well as a patchwork of first and second degree burns where your shirt caught fire. If you had worn the correct protective gloves, you could have reduced the risks and avoided serious burns. You'll need skin grafts and months of rehabilitation. Your hands took the bulk of the heat blast, causing third degree burns. The pressure wave knocked you off your feet and into the wall behind you. The vaporised metals, smoke and burnt components formed a boiling, poisonous gas that engulfed you and went into your airways. The copper conductors vaporised and expanded up to 67,000 times their original volume, culminating in a shower of molten metal flying directly at you. And it happened 30 centimetres from your face. That's four times hotter than the surface of the Sun. A fireball that reached 20,000 degrees Celsius in a fraction of a second. The arc caused a superheated ball of flame to erupt around you. When that electrical arc fault occurred, the following things happened. An unexpected, violent electrical short circuit where current flowed between the phase conductors, neutral and Earth. So what just happened, you just experienced an arc flash. Whatever the reason, you're working on live, energised equipment and this is about to happen. There's a loose screw waiting to drop at any minute, and the insulation on the bus bar is old, worn and about to crack.īut that doesn't matter. What you don't know is in the six months since this panel was last opened, dust has built up between live parts. You aren't going to rock the boat by asking for the power to be shut down. You've been called in to do a quick job, change a circuit breaker. When you woke up this morning you thought this would be a day like any other. Hazardous manual tasks Toggle menu for Hazardous manual tasks. Heavy equipment and utility vehicles for demo activities.Heavy equipment and utility vehicles for grading and excavating tasks.Large drivable milling machines (half lane and larger).Small drivable milling machines less than half lane.Walk-behind milling machines and floor grinders.Handheld grinders for tasks other than mortar removal.Jackhammers or handheld powered chipping tools.Vehicle-mounted drilling rigs for rock and concrete.Handheld power saws for cutting fibre-cement board with a blade diameter of 200mm or less.Construction dust: respirable crystalline silica.Respirable crystalline silica in the stone benchtop industry.Reduction in workplace exposure standard for respirable crystalline silica.Respirable crystalline silica audit campaign report: Stage 3.It should be required for all electricians. It also reminds qualified electrical workers about the steps they can take to ensure co-workers remain safe while electrical work is ongoing. This important training helps electrical workers become familiar with the updates in the 2015 NFPA 70E standards and how to apply them when performing electrical work. The NFPA Hazard risk categories are addressed and the types of personal protective equipment required for each hazard risk category is explained. A thorough discussion of arc-rated clothing and equipment is provided, along with the risks of failing to use appropriate arc-rated clothing. Learn about the boundary necessary to protect against injury from an arc flash and where to find the defined boundaries in the standard. Qualified electrical workers learn about limited, restricted and prohibited approach boundaries to provide protection from electric shock and arc flashes. It explains when energized work is allowed, and what is required to obtain an energized electrical work permit. It discusses the dual hazards of electricity, defines an electrically safe work condition through a de-energized state, and how to test to verify no voltage exists. This course provides an overview of the National Fire Prevention Association (NFPA) 70E standards that facilitate electrical worker safety.
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