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Electrical Hazards And Control Measures

Electrical Hazard

Today our topic is Electrical safety & we will cover Electrical hazards and control measures.

Electrical Hazards

  • Electric shock.
  • Heating and source of ignitions.
  • Mechanical and other hazards.
Causes of Electrical Hazards:
  • Faulty or damage wiring or equipment.
  • Loose connections.
  • Use of poor quality fittings.
  • Lack of earthing/bonding and grounding.
  • Use of overrated fuse or jumper.
  • Working on live equipment.
  • Overloading of power sockets and equipment.
  • Poor housekeeping.
  • Handling of electrical equipment with an incompetent person and lack of training awareness.
  • Lack of safe working procedure and communication.
  • Failure to use appropriate PPE and use.
  • Lack of warning signs.
Electrical Safety Control Measures:
  • A competent and experienced person shall be allowed to do electrical jobs.
  • Don’t work on live equipment, isolation and multi lock system shall be followed.
  • Don’t hang cloth or any material on electrical equipment.
  • Handling of electrical equipment or switchgear shall not be done with wet hand or body.
  • Electrical switches or access to them shall not block by any material.
  • Use appropriate PPE while working on electrical equipment.

Residual Current Device (Rcd) Or Earth Leakage Circuit Breaker (Elcb):

An electrical safety device used to protect people from electric shock injuries by sensing the leakage of currents to ground and de-energizing the circuit to prevent the injury.
Multi lock system:
Multi-lock system is use to prevent injury by accidental energizing of an equipment While it is attend by different craft.
  • The executing authority and issuing authority will jointly decide the requirement.
  • The issuing authority issues the work permit to competent electrical person to Isolate the electrical equipment from substation.
  • The competent electrical person and the Executing Authorities install their Locks in the multi-lock pad as per color-coding.
  • Then electrical and other parties sign the section 4B of the work permit (KNPC Permit).
  • Color coding of pad-locks
    •              Electrical maintenance          Brass Yellow
    •              Mechanical maintenance      Black
    •              Other                                         Blue
  • Each lock shall be numbered and the key shall be same number.
  • After locking, the person who installs the lock is the responsible custodian of the key.
  • Electrical maintenance will have to remove lock lastly after receiving all necessary permits.
  • The lock shall be removed by individual craft after completion of their job.

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