G-TTCO TTC OH Wires Part 2

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Questions and Answers

What is the minimum clearance required when working near TTC streetcar power lines?

  • 1.5 metres (5 feet)
  • 2 metres (6.6 feet)
  • 1 metre (3.3 feet) (correct)
  • 1.8 metres (5.9 feet)

What is the consequence of contact with OCS transformers and vaults?

  • Electrocution, severe burns and/or death (correct)
  • No electrical hazard
  • Minor electrical shock
  • Electrical shock and burns

What is the general rule for all wires?

  • Test them before touching
  • Check with a supervisor
  • Consider them live (correct)
  • Assume they are dead

What is the minimum distance that TFS personnel must maintain from the OCS?

<p>1 metre (3 feet) (B)</p> Signup and view all the answers

What should ground personnel avoid when near overhead wires?

<p>Providing a ground for an electrical circuit (A)</p> Signup and view all the answers

What is considered live at all times?

<p>All wires in the OCS system (B)</p> Signup and view all the answers

Who are allowed to use rubber/plastic protective cover up?

<p>Only trained and approved TTC workers (C)</p> Signup and view all the answers

What is the TTC Emergency Contact Number?

<p>416-393-355 (C)</p> Signup and view all the answers

What is the recommended distance to maintain from all live or isolated wires, lower voltage wires, and equipment?

<p>1 metre (3 feet) (B)</p> Signup and view all the answers

Why must aerial ladders, towers, platforms, and ground ladders be kept at a minimum distance from TTC overhead streetcar wires?

<p>To prevent electrical shock (C)</p> Signup and view all the answers

What is a common sign of electrical shock?

<p>All of the above (D)</p> Signup and view all the answers

What can be a long-term effect of electrical shock?

<p>Muscular pain and discomfort (B)</p> Signup and view all the answers

What should you do if you have experienced a physical hazard such as shock or electrocution?

<p>Consult a physician (D)</p> Signup and view all the answers

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Study Notes

Safety Around OCS (Overhead Contact System)

  • OCS overhead contact wires are considered live at all times and cannot be de-energized.
  • Maintain a 1-meter (3 feet) limited approach boundary when working around the OCS.

Hazards and Risks

  • Contact with OCS wires can cause electrical shock and electrocution.
  • Electrical shock can lead to muscle spasms, difficulty breathing, headaches, burns, and numbness.
  • Long-term effects of electrical shock include muscular pain, fatigue, headaches, and problems with nerve conduction and sensation.
  • Electrical injury can also affect neurocognitive function, including mental processing speed, attention, concentration, and memory.

Safe Distances and Clearance

  • Maintain a minimum distance of 1 meter (3 feet) from all live or isolated wires, lower voltage wires, and equipment (less than 750 VDC).
  • Aerial ladders, towers, platforms, and ground ladders should remain at least 1 meter (3 feet) away from TTC overhead streetcar wires, cables, support wires, and associated attachments.
  • Clearance of 3 meters (10 feet) should be maintained for non-TTC overhead wires.

Electrical Safety Guidelines

  • Treat all wires as live at all times.
  • Rubber/plastic protective cover-up should only be used by trained and approved TTC workers.
  • Avoid contact with an aerial, tower, platform, or ground ladder if it contacts any overhead wires.
  • Never provide a ground for an electrical circuit.
  • Follow all electrical safety guidelines when deploying an aerial, tower, platform, or ground ladder around any overhead wires.

Emergency Contact

  • The TTC emergency contact number is 416-393-3555.

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