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Showing posts from April, 2021

Arc Flash Hazard Analysis / Risk Assessment

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  1. What are the steps involved in Arc Flash Analysis? A. Arc Flash Hazard Analysis or Risk Assessment is a study conducted by trained safety experts to analyze electric equipment and power systems in order to predict the amount of incident energy from an arc flash. According to IEEE std 1584, there are 9 steps involved in this Arc Flash Analysis, which we are going to discuss here. Step 1: Collect the system’s installation data: The largest effort in an arc-flash hazard study is collecting the data from the site. Start by reviewing the one-line diagrams and electric equipment, site, and layout arrangement with people who are familiar with the site. The diagrams have to be updated to show the current system configuration and orientation before the arc-flash study starts. The one-line diagrams must have all alternate feeds. If SLDs are not ready, prepare them.              Once the diagrams are completed in the basic electric system scheme, enter  the data needed for the short

What are Common Electrical Hazards at Work Place?

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  It is very important to understand your workplace and the available hazards or risks in the place. We have to ensure that our workplace is safe and personally take responsibility for keeping it safe. You might be working in developed nations like the USA, Saudi Arabia, Qatar, UK, United Arab Emirates Kuwait, or developing countries like India, Brazil, the Philippines, or any other nations. Irrespective of the country your workplace is located it's the responsibility of the employer to provide a safe working environment as per OSHA regulations and the responsibility of the employee to understand the available risk and follow the rules and apply the risk-mitigating techniques as per the international standards and regulations. The main hazards of working with electricity are electric shock and  burns  from contact with live parts. Injury From exposure to arcing,  fire  from faulty electrical equipment or installations. Electric shock   Exposure to Arc-Flash Exposure to Arc-Blast

What Should be the idle Earthpit Depth?

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In general, the depth of an earth pit is 10 feet. But it is not the same for all the applications; it depends upon the factors like soil resistivity, soil condition, moisture, dissolved salts, climatic conditions, physical composition, location of earth pit, the effect of grain size and its distribution, the effect of current magnitude and its duration, are available. Soil Resistivity: It is the resistance of the soil to the passage of electric current. The earth resistance value (ohmic value) of an earth pit depends on soil resistivity. It is the resistance of the soil to the passage of electric current. It varies from soil to soil. It depends on the physical composition of the soil, moisture, dissolved salts, grain size and distribution, seasonal variation, current magnitude etc. Soil Condition: Different soil conditions give different soil resistivity. Most of the soils are very poor conductors of electricity when they are completely dry. Soil resistivity is measured in ohm-met