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In the construction of machines, plant and products, materials are selected because they have particular physical and chemical properties. Wood, metals, concrete, plastics and other substances all have their uses but there are limitations as to what they can do and how long they can do it. Properties may change with use, temperature, operating atmosphere, contamination by surrounding chemicals and for many other reasons. It is necessary to know the properties of the materials and how and why they have been used so that an assessment can be made of whether likely changes in the properties may give rise to hazards.
These properties stem from the chemical and physical characteristics of the different materials and substances used and their behaviour under certain conditions can determine the safety or otherwise of a process or operation.
you are working on electrical circuits or with electrical tools and equipment, you need to use following golden safety rules
Avoid contact with energized electrical circuits ,Treat all electrical devices as if they are live or energized. You never know.Disconnect the power source before servicing or repairing electrical equipment.
Use only tools and equipment with non-conducting handles when working on electrical devices.
Never use metallic pencils or rulers, or wear rings or metal watchbands when working with electrical equipment. This rule is very easy to forget, especially when you are showing some electrical part pointing with metallic pencil.
When it is necessary to handle equipment that is plugged in, be sure hands are dry and, when possible, wear nonconductive gloves, protective clothes and shoes with insulated soles.
If it is safe to do so, work with only one hand, keeping the other hand at your side or in your pocket, away from all conductive material. This precaution reduces the likelihood of accidents that result in current passing through the chest cavity.
If you ever read about current passing through human body you will know, so remember – work with one hand only.
Minimize the use of electrical equipment in cold rooms or other areas where condensation is likely. If equipment must be used in such areas, mount the equipment on a wall or vertical panel.
If water or a chemical is spilled onto equipment, shut off power at the main switch or circuit breaker and unplug the equipment
If an individual comes in contact with a live electrical conductor, do not touch the?equipment, cord or person. Disconnect the power source from the circuit breaker or pull?out the plug using a leather belt.
Equipment producing a “tingle” should be disconnected and reported promptly for repair.
Do not rely on grounding to mask a defective circuit nor attempt to correct a fault by insertion of another fuse or breaker, particularly one of larger capacity.
Drain capacitors before working near them and keep the short circuit on the terminals during the work to prevent electrical shock.
Never touch another person?s equipment or electrical control devices unless instructed to do so.
Enclose all electric contacts and conductors so that no one can accidentally come into contact with them.
Never handle electrical equipment when hands, feet, or body are wet or perspiring, or when standing on a wet floor.
Never handle electrical equipment when hands, feet, or body are wet or perspiring, or when standing on a wet floor.
Do not store highly flammable liquids near electrical equipment.
De-energize open experimental circuits and equipment to be left unattended.
Do not wear loose clothing or ties near electrical equipment. Act like an electrical engineer, you are not on the beach.
yes offcourse safety is impotant for electrical engineer because there is alot of risks while you are working without safety.
That goes without saying, it is the duty of the employer to make sure that every employee is provided with all health and safety training and personal protective equipement required for the site/ premisis they are working at that includes a site induction prior to starting work.
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