When can Arc Flash occur ?
Arc Flash occurs when insulation or isolation between electrified conductors is breached or can no longer withstand the applied voltage.
What are causes of Arc Flash in ASSEMBLY ?
Probbable causes may be :
Dust Accumulation
Corrosion
Dielectric Breakdown
Faulty Equipment
Poor Maintenance
Tool Dropped into Assembly
Careless Removal or Replacement of Cover or Switchgear
Entry of Foreign Bodies
missalignment of moving contacts