What are electrical hazards?

An electrical hazard can be defined as a dangerous condition where a worker could make electrical contact with energised equipment or a conductor, and from which the person may sustain an injury. During such a situation, the human body is exposed to the electrical current, the body acts as a resistor and allows the current to pass through it. The value of resistance varies with the physical condition of the human body and water presence. Some of the common electrical hazards are:

  • Overhead power lines
  • Damaged tools and equipment
  • Inadequate wiring and overloaded circuits
  • Exposed electrical parts
  • Improper grounding
  • Damaged insulation
  • Wet conditions

Preventive measures

Electric sparks, loose connection, improper wiring and lack of personal protective equipment can lead to a fire/shock therefore certain precaution should be taken while dealing with an electrical circuit/equipment.

  • Only trained electrical engineers should work on the installation and maintenance of the solar PV electrical system
  • Electrical circuit breakers should be used during the maintenance activities
  • Electrical circuit diagram should be available for the engineer
  • Use insulated tools (e.g. spanners)
  • Put covers over the battery terminals
  • Install fuse (e.g. near the battery)
  • Check contact and voltage drop
  • Tighten up screw wherever applicable
  • Check cable and terminal block periodically
  • Always check the voltage between any conductor and any other wires, and to ground
  • Always wear gloves and avoid touching conductive parts (e.g. battery terminals, metal and mounting frames) with bare hands



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