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7 Causes of Electrical Injuries Explained for Your Safety

electricalterminology 12 months ago
Causes of electrical injuries

Electrical injuries can occur in a variety of ways and can range from minor to severe. These injuries can happen in the workplace, at home or in public spaces and can result from a variety of causes. Understanding the potential causes of electrical injuries is important in order to prevent them from occurring. In this article, we will explore seven common causes of electrical injuries.

Causes of Electrical Injuries

Electrical injuries can be caused by several factors such as:

1. Touching a live conductor

Faulted electrical equipment constitutes a danger to personnel when they come in contact with such devices. The contributing factor to all these dangers is the aging of the equipment’s insulation, missing ground wire and/or improper installation. Copper thieves are seriously injured when they try, for commercial reasons, to remove live copper wires.

Touching a live conductor

2. Open neutral

When the neutral of a 240/120 V, single-phase, the 3-wire power distribution system is accidentally open (at the utility’s transformer or at a home’s electrical entrance), under voltages and overvoltages develop that can damage property and injure personnel.

Open Neutral

3. Arc flash

When a solid short circuit takes place between electrical conductors, it breaks down the dielectric of the air space between them and an “Arc flash” develops. The resulting high currents produce extremely high pressures and temperatures and can seriously injure unprotected personnel.

Arc Flash

4. Energy stored in magnetic and electric fields

On current interruption, the inductors (magnetic fields) release the energy stored while the capacitors (electric fields) withhold the energy stored. These energies when not properly harnessed can cause equipment damage and injury to personnel.

Energy stored in magnetic and electric fields

5. Stray voltages

Leakage ground currents are occasionally the cause of serious injuries to swimmers in lakes and pools. They can also adversely affect the behavior of agricultural animals and the operation of field sensors.

Stray Voltage

6. Lightning strikes

Anyone who is outdoors in the midst of thunder and lightning has no protection. Taking shelter under a tree can perhaps mitigate the catastrophic effects if simple precautions are taken.

Lightning strikes

7. Improper earthing

Many of the shock cases are reported due to improper earthing such as a metallic part that accidentally becomes energized by contact with an electrical conductor whose insulation has deteriorated. For any electrical installation, proper earthing is a must. The earthing completes the electrical circuit and arranges to trip the faulty circuit by operation of protective equipment such as fuse, MCB, leakage current detector, Earth fault relay, Zero sequence detectors, etc.

Improper earthing

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Next: Safety Tips to Know When Working With Electricity at Home

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