MSHA Issues Safety Alert for Electric Arc Flashes
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Two miners received burns from an arc flash while checking the rotation on a transformer
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An electrician and trainee where injured by an arc flash after they re-entered a cathead and engergized the breaker
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MSHA has issued a safety alert for electric arc flashes. In the last six months, 11 miners received injuries due to electric arc flashes.
BEST PRACTICES
• Establish safe procedures before beginning work and discuss the plan
with all miners involved in the task.
• Electricians must know how to de-energize and disconnect electrical
systems and equipment.
• Use properly rated electrical meters and personal protective equipment,
such as electrically rated gloves, insulated blankets or mats, and
polycarbonate barriers.
• Lock out and tag out circuits before working on electrical equipment.
• Identify and control all hazardous energy sources before conducting
any task.
• Open the circuit breaker or load break switch to de-energize the
incoming power cables or conductors.
• Open the visual disconnect to confirm incoming power is off.
• Lockout/Tagout the visual disconnect.
• Ground the de-energized conductors.
MSHA works to prevent death, illness and injury from mining and promote safe and healthful workplaces for U.S miners. The agency develops and enforces safety and health rules for all U.S. mines regardless of size or number of employees. MSHA also provides technical, educational and other types of assistance to mine operators. MSHA works cooperatively with industry, labor and other federal and state agencies to improve safety and health conditions for all miners in the U.S.
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