Electrical Hazard

 

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.