Electrical Drills

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Electrical Drills
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Introduction

• Todays focus is on electric drills
• Electric drills are a commonly used tool in the
  construction industry but they can be potentially
  dangerous
• Following simple safety procedures can reduce
  that danger factor

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Statistics

• Its estimated that about 350 construction workers
  die each year do to electrical accidents
• The number is unknown but many people are injured
  by being startled from the shock and falling from
  the scaffold or ladder

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What is OSHAs view on electric drills

• 1926.302 (a)(1)- Electric power operated tools
  shall either be of the approved double-insulated
  type or grounded in accordance with subpart K
• 1926.302 (a)(2)- The use of electric cords for
  hoisting or lowering tools shall not be permitted

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Electrical Drills can be Fatal

• Human Perspiration can deadly
• Ex. An employee was drilling a hole in the wall
  hit 120- volt non-metallic sheathed cable, the
  employee who was kneeling on the ground was
  perspiring, and as a result was electrocuted due
  to ground fault

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Electrical Drills can be Fatal

• Defective power supply cords are deadly!
• Ex. A worker who was wet from the rain and
  working on a power pole was electrocuted because
  the power supply cord was defective, and the
  conductors inside the cord where exposed.

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Battery Powered can be Fatal

• Battery Powered Drills can cause Electrocution
• Ex. A worker using a battery powered drill was
  drilling sheet metal into the floor when his
  screw hit a 120-volt non- metallic sheathed
  cable. This energized the sheet metal and the
  worker who was standing on the sheet metal was
  eletrocuted.

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When operating and electric drill several safe
precautions should be considered!
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Examine the drill and power cord

• Make sure the casing of the drill is securely
  intact
• Inspect the power supply cord for any bare wires
  that can be dangerous

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Be aware of where you place the power supply cord!

• Dont let the cord sit in water, snow, oil, or in
  hot areas that can potentially melt the
  insulation
• Dont run the cord in high traffic area where
  other workers can trip and fall

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Have good footing

• When drilling make sure the area around you is
  not wet or slippery
• Stay balanced when drilling on scaffold or a
  ladder

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Be mindful of your clothing

• Make sure any loose clothing is away from the
  drill and jewelry
• Incase of drill slipping keep feet away from the
  drill
• If hair is long have it secured or tuck it under
  a hat
• Ex. Dr. Hinze had a worker with long hair using a
  electric drill, his hair got caught in the drill
  and it ripped a piece of his scalp out

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Use sharp drill bits

• Sharp drill bits cause the work to exert less
  force, which reduces the chance of slipping
• Sharp drill have a less chance of snapping or
  breaking off

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Safety Glasses

• Always wear eye protection when using a drill
• Safety glasses reduce the chance of debris
  getting into your eye

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Conclusion

• Every day injuries on the job site occur, but we
  must try to limit them if not erase them by
  following OSHA guidelines and using common sense.
  Also by looking out for one another we can
  greatly reduce the amount of injuries that occur.