HSE : IQA : Electrical Safety

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The Safety Interview Question & Answer

Topic : Electrical

1. What is earthling?
• Earthling means connecting the natural point of the supply system to the general mass of the earth by line.
2. What is ELCB?
• It is protection of living beings under electro charging by fast isolation from the live conductor to avoid permanent disability or death.
3. Precaution for electric shock
• Use dry hard gloves & rubber sole, safety boots, gum boots
• The electric holder must be fully insulted
• Proper protection for the body
• During chipping of slag use white goggles
4. What precautions are necessary in electrical work?
• All electrical installations shall be as per Indian electricity rules
• Only competent persons should handle the electrical equipments
• The equipments should be earthed properly
• All temporary electric lines should be drawn at least above man’s height
• Cable should be completely insulted
• Cable should not have any joints
• Only connection for one point
• Good housekeeping on the area
• Fire protection equipment to be kept near by
• Use rubber gloves and rubber boots
• Use good quality of wire
• Power isolation close to the job
• Use three pin plug instead of loose wire
• Never operate any electrical equipment with wet hands
• Never stand wet surface while working electrical equipments
• During thunder storm do not stand under tree
• Proper sign board is necessary
• No person shall work on any live electrical conductor
• The switch shall only be put on by person who switched it off
5. How to Check Stored Energy After Isolation?
• After isolating energy sources (e.g., electrical, mechanical, hydraulic), stored energy (e.g., in capacitors, springs, or pressurized systems) must be identified and dissipated to ensure safety. Follow these steps:
• Identify Potential Stored Energy: Review equipment manuals or consult safety data to locate stored energy sources (e.g., compressed air, elevated components).
• Release or Dissipate Energy: Use appropriate methods, such as bleeding off pressure valves, lowering suspended loads, or discharging capacitors with a grounded tool.
• Verify Dissipation: Use testing devices (e.g., multimeters for electrical energy, pressure gauges for pneumatic systems) to confirm energy levels are at zero or safe limits.
• Secure and Monitor: Apply lockout/tagout devices and recheck periodically if the equipment remains isolated for an extended time.
• Verification of Isolation Procedure: Verification ensures all energy sources are effectively isolated and the equipment is safe to work on. Follow this process:
• Visual Inspection: Confirm all energy-isolating devices (e.g., switches, valves) are in the off position and locked/tagged.
• Test Equipment: Use appropriate testing tools (e.g., voltage testers, pressure gauges) to check for residual energy at the work point.
• Try to Operate: Attempt to start the equipment (with proper clearance) to confirm it doesn’t activate, then return controls to the off position.
• Document: Record the verification steps and results, ensuring all team members are informed and the area is safe.
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