30-04-2014, 03:18 PM
IE 331 – Electrical Safety
Electrical Safety.ppt (Size: 364.5 KB / Downloads: 14)
Is Electrical Safety Important?
11% of OSHA general industry citations address electrical hazards
Improper grounding
Ungrounded tools
Portable tools in damp/wet locations
Ground pin broken off
Exposed live parts
Sloppy electrical installations
Breaker box open
Can a 110V circuit kill?
Myth: Ordinary 110V circuits are safe.
Reality: 110V circuits kill many more people than 220 or 440V circuits (which people do respect)
Why? Almost everyone has received a shock from a 110V circuit and lived to tell about it.
Path of Least Resistance
If there is more than one path, the primary flow will be through the path of least resistance
If that path leads through critical organs (especially the heart), more likely to be fatal
Control of Electrical Hazards
Physical: materials used, design of components, placement of electrical equipment, shielding, enclosures, double insulated tools
Overcurrent Devices: fuses, circuit breakers
Switching Devices: lockouts, interlocks, thermal & overspeed cutouts
Grounding & Bonding
GFCI
Low Voltage Tools
Smart Power Integrated Circuits
Warnings
Procedures
First Aid
Train personnel for special considerations for accidents from electrical hazards
Rescuers often become victims also
Respiratory arrest and fibrillation are common
Knowledge of CPR is essential
Must have immediate response
AED – Automated External Defibrillator