How do we get shock ?What are the effects of shock ?
On all alternators , transformers and every third pole , the neutral is earthed . Human body is a conductor . When the live wire touches the body . current completes its way through body and earth and the muscular functions of the body are paralysed due to the current's action on the nervous system , the heart and respiratory organs which may cease to function causing , breathing to stop , severe burns , and resulting in death . Fig . 1.1 , explains itself that how we get shock .
What are the precautions to be taken to prevent electric shock ?
1. Care in handling all electrical apparatus and equipment is the only effective safeguard against injury and death .
2. Never use appliances etc. that have damaged or frayed leads .
3. Replace immediately broken switches and plugs etc. 4. Check that all metallic parts of electrical equipments are effectively earthed . 5. Never place bare wires of leads in plog . Fit a plug top . 6. Check proper working of safety devices Keep proper condition of electrical hand tools . 8. Use correct rating of fuses 9. Never tamper unnecessarily with any live apparatus . Q. 1.3 . What precautions should be observed while working or handling the electrical appliances and equipments ? Ans . Following precautions should be observed before using the electrical appliances and equipments I. Always be careful . Do not think of others while working on electricity . 2. You should not energise any conductor unless you are sure that all is clear and there is none working on it . 3. You should not tamper unnecessarily with any live electrical gear . 4. You should not disconnect any plug by pulling the flexible cable . 5. Before replacing a blown fuse , always remember to put the main switch ' off 6. Safety demands a good earthing . Hence , always keep earth connections in good conditions . 7. Before using portable electrical things , see that these are well - earthed . 8. While handling an electrical appliance like table fan , iron , heaters , etc , be sure that they are disconnected from the supply . Switching off is not enough . Leaky insulation may give serious shock .
