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Electrical Hazards & Safety tips

Electrical Safety :

   Electrically powered equipment can pose a significant hazard to workers particularly when was handed or not maintain many electrical devices have high voltage or high power requirements carrying even more risk.

Electrical Shock Hazardous :

   The major hazards associated with electricity are electrical shops fire and arc flash electrical shops occur when the body become part of the electric current other win an individual comes in contact with both wires of an electrical current one wire of energies circuit and the ground or a metallic part that has become energized by contact with an electrical conductor.

   The celebrity and effects of an electrical shops depend on a number of factors such as the pathway through the body the amount of current the length of time of the exposure and whether the skin is wet or dry water is a great conductor of electricity following current to flow more easily in wait conditions and through wet skin.
   The effect of the shock may range from a flight single of server to cardiac arrest the chart below shown in image the general relationship between the degree of injury and amount of current for a 60 cycle hand to foot path of 1 seconds duration of shock while reading this chat keep in mind that most electrical current circuit can provide under normal conditions of to 20,000 Milli amperes of current flow.

   In additional to the electrical shops hazard sparks from electrical equipment can serve as an ignition source for flammable or explosive vapours.
Arc Flash -
A hazardous arc flash can occur in any electrical devices regardless of voltage in which the energy is Ina to sustain an Arc potential place where this can happen include :

  1. Panel boards and switch boards.
  2. Motor control centres.
  3. Metal clad Switch gear.
  4. Transformers.
  5. Motor starters and drive cabinets.
  6. Fuse disconnects.
  7. Any place that can have equipment failure.
   In an Arc flash accident enormous amount of concentrated Radiant energy exploded outward from electrical equipment the explosion creates pressure wave that can damage a person's hearing, a high intensity flash that can damage their my sides and superheated ball of gas that can severally e birth a workers body and melt metal.

Electrical Safety - Related Work Practices : 

Only qualified workers who have been trained in the avoidance of electrical hazards are permitted to work on or near exposed energize part safety related work practices are employees to prevent electrical shop or other injuries resulting from either direct or indirect electrical contact when work is perform near or on equipment are circuits which are are aur maybe energize the specific safety related work practices must be consistent with the nature and extend of the associated electrical hazards.
Qualified Personnel vs. Unqualified Personnel :
For the purpose of electrical safety related work practices there are two types of employees in the workplace that may come in contact with electrical equipment on a job side : qualified and unqualified a qualified employees is defined as a worker who.
  •  Has been trained to avoid electrical hazard when working on or near exposes energize part.
  • Is familiar with the safety related work practices as required by OSHA standards.
  • Is able to distinguish expose live parts of electrical equipment.
  • Is knowledgeable of the skills and techniques used to determine the nominal voltages of exposes parts and components.
An qualified employees define as a worker who has little or no training regarding electrical hazards even through an qualified person should not be exposed to energise part they should be provided with information and training necessary to perform their job in a safety manner and understand the following:

  • be familiar with any electrical hazards in the workplace.
  • understand procedure to follow and to protect themselves when they work around electricity.
  • understand which task that can only be performed by qualified workers ( e.g.  maintenance and repairs ). 
  • know when and how how to report electrical problems.
  • know what to do in the event of emergency involving electricity.
  • know how to inspect electrical tools and equipment before use to make sure insulation and wiring are in good condition.

Live parts two which an employee may be expose must be De energize before the employee works on or near them unless the energizing the parts introduced additional or increase hazards or is is an feasible due to equipment designs for operational limitations. For example of increase or additional hazards include interruption of life support equipment deactivation of emergency alarm system shutdown of hazardous location ventilation equipment for removal of illumination for an area live Exposures electrical burns or two explosions due to electric arc.

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