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7 Cards in this Set
- Front
- Back
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Hazards of electricity (Acronym)
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B.S.A.F.E
Burns Shock Arcing Fire Explosion (S)econdary effects - Thrown back from ladder - falling from height |
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Effects of amount of current (mA) flowing through the body:
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0.5 - 2 - Threshold of sensation
2 - 10 - Tingling sensations, muscle tremor, painful sensations 10 - 60 - Muscle contractions, inability to let go, inability to breathe 60 and above - Ventricular fibrillation, cardiac arrest, extreme muscle contractions causing broken bones, burns at contact point and deep tissues. Death becomes more likely as current increases |
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Factors that influence the severity of injury associated with receiving and electric shock
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1. Contact surface area: more skin= lower resistance and more severe injury
2. Duration: The length of time that a person is exposed to the flow of electricity can prove fatal 3. Frequency: of the AC current 4. Current path: The route that the electricity takes as it flows through the body. If it goes through the chest it is likely to effect the heart 5. Environment: Wet surfaces, humid air, metal surfaces will all reduce resistance and increase the current flow and severity of the shock |
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Burns, 2 different ways:
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Direct electrical burns
Indirect electrical burns (secondary effects) |
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Controls of electricity
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Earthing
Inspection testing - User, visual, both P.P.E - Rubber soled shoes, gloves Maintenance CE marked Reduce voltage AC to DC Fuses RCD (residual current devices) protect humans MCB (miniature circuit breakers) protect equipment Isolation L.O.T.O (lock out, tag out) S.S.O.W P.T.W Competent users only I.T.I.S 2p rule Double insulation Intrinsically safe equipment |
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Factors that influence the frequency of inspection and testing
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Legal standards and codes of practise
Manufacturers’ recommendations Age of the equipment Frequency and duration of use Foreseeable abuse of the equipment |
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Things to check during routine visual (user) inspection of a portable appliance
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1. Body of plug is intact and secure
2. Body of appliance is intact 3. Plug and appliance are not wet 4. Plug cable clamp appears to be tight 5. Plug and appliance are not excessively soiled 6. No obvious scorch marks to plug or appliance body |
