HOW MUCH CURRENT (Electrical)
CAN BE DANGEROUS TO HUMAN BEING
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ARC FLASH HAZARDS AND PROPER PRECAUTIONS
Electrical Energy is a good servant and
its is a bad master when it is handled without following the standard procedure.
We should know how much current is dangerous
to human being, lets refer below.
The deciding factors are the length of
time exposed, the path of current flow, the ampere.
DO’S & DONT’S OF EARTHING SYSTEM
Danger - It doesn’t take much, especially if it passes through
your heart. Currents above about 75 milliamps (mA) can cause a condition
called ventricular fibrillation. (A milliamp is 1/1,000 of 1
amp.) When your heart goes into fibrillation, it beats very rapidly – but it
doesn’t pump any blood – because it’s not beating in its normal rhythm. If your
blood can’t carry oxygen to your brain, you’ll experience brain death in 3 to 4
minutes. The way to get you back involves another electric shock, from a defibrillator.
MEWP, HOIST, EXCAVATOR - CHECKLIST WITH PICTURES
If human being skin is wet and you get your body across 120 volts
of electricity, it’s very likely that you’ll have a current of 100 mA or more
flowing through your heart. Currents ABOVE 10 MA can cause
muscle paralysis. You may not be able to let go of energized tools or
equipment. Shocks that are longer in duration are more severe
and the longer time exposure increases the severity.
FREE - Training Module on PERMIT TO WORK
Electrical systems must be wired with either fuses or circuit
breakers kind of protection. These devices are known as overcurrent
protection and they are rated in amps. Most common household circuits are
wired for 15 amps or 20 amps. Overcurrent protection devices protect wiring
and equipment from overheating and fi res. They may – or may not – protect
you from electrical shock. If the current isn’t high enough, the fuse won’t
blow or the circuit breaker won’t trip. You could be shocked or killed without ever
blowing a fuse or tripping a circuit breaker.
PART 1 | HSE Interview Questions and Answers
SAFETY CULTURE ASSESSMENT CHECK POINTS
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