Due to fault in electrical wiring systems of any site account for the majority of disaster and in some cases fatal electrical shock accidents.
Every year more than 25000 are killed by electricity at work in India alone, In addition to these disasters, more than 1,00,000 major injury accidents and injuries are also reported.
Around 25% of all electrical injury accidents are caused by Personal Protective Equipment (PPE). Faulty electrical leads & wiring causes more than 2000 fires each year.
Property owners and managers should take responsibility for the overall safety of electrical installations i.e. fixed wiring, installation, inspection, testing and maintenance.
Day - 1
1. Principles of electrical safety :
· Hazards of electricity
· Direct and indirect shock.
· Effects of electricity on human beings, the heart, and nervous system.
· Thermal and arc flash hazards.
· Static electricity hazards
2. Earthing and bonding for safety :
· Basics of grounding.
· Types of system/neutral grounding
· Protective grounding
· Three systems of grounding arrangements TT, TN and IT
· Grounding concepts for sensitive electronic systems
· Grounding for noise suppression
· Concept of transferred potential and equipotential bonding for safety.
3. Arc flash hazard assessment and control :
· Main causes of Arc flash and its consequences.
· Arc flash assessment hazards assessment methodology as per NFPA 70E and IEEE1528.
· Selection of PPE
4. Hazards of static electricity and its control
· Sources of static electricity.
· Control measures –earthing bonding, use of antistatic materials
Day - 2
1. Protection against lightning and surges
· Direct and indirect effects of lightning
· Assessment of lightning risk as per IS 2309.
· Lightning protection systems design – Rolling sphere method
· Surge protection concepts.
2. Safety in the design of electrical equipment :
· Importance of insulation for safety
· Ingress protection
· Introduction to Internal Arc classified (IAC) switchgear
3. Electrical equipment for hazardous areas
· General principles of Hazardous area classification as per IS 5572 and IEC.
· Risk assessment methodology.
· Selection of electrical equipment and other safety measures for hazardous areas
· Selection of Electrical Equipment for Hazardous Locations
Protection concepts such as energy limitation, explosion confinement and ignition source isolation
· Types of protection as per IEC 61079
4. Safety in operation and maintenance :
· Procedures for safe working in electrical installations- PTW and LOTO, precautions before and after maintenance.
· Role of PPE – electrically rated PPE.
· Safe handling of portable tools.
· Safety in inspection, erection and commissioning –hazard identification (JHA), risk assessment and SOPs.
· Temporary Electrical Connections.
· Role of house keeping in safety.
5. Safety regulations in India
· CEA, NEC, OISD
· Safety Requirements for Industries under the various acts.
6. Case Studies and Group Discussions