Occupational Safety & Health - Lectures & Reminders

20/05/2026

Safety Rules for Working with Electrical Equipment

21 Safety Rules for Working with Electrical Equipment
A safe work environment is not always enough to control all potential electrical hazards. You must be very cautious and work safely. Safety rules help you control your and others risk of injury or death from workplace hazards.

If you are working on electrical circuits or with electrical tools and equipment, you need to use following golden safety rules:

Golden Safety Rules

Rule no. 1
Avoid contact with energized electrical circuits.Please don’t make fun of this rule if you already know this (and you probably already know if you are reading these lines) and remember that if something bad occurs – you probably won’t have second chance. That’s not funny.

Rule no. 2
Treat all electrical devices as if they are live or energized. You never know.

Rule no. 3
Disconnect the power source before servicing or repairing electrical equipment.
The only way to be sure.

Rule no. 4
Use only tools and equipment with non-conducting handles when working on electrical devices.
Easy to check.

Rule no. 5
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.
Always be aware.

Rule no. 6
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.
Remeber: gloves, clothes and shoes.
Safety clothes, gloves and shoes

Rule no. 7
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.
If you don’t clue about electric current path through human body, read more in following technical articles:

Do You Understand What Is Electric Shock?

What psychological effect does an electric shock?

Rule no. 8
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.

Rule no. 9
If water or a chemical is spilled onto equipment, shut off power at the main switch or circuit breaker and unplug the equipment.
Very logical. NEVER try to remove water or similar from equipment while energized. Afterall, it’s stupid to do so.

Rule no. 10
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.
Tricky situation, and you must be very calm in order not to make the situation even worse.
Like in previous rules – Always disconnect the power FIRST.
Always disconnect the power FIRST
Rule no. 11
Equipment producing a “tingle” should be disconnected and reported promptly for repair.

Rule no. 12
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.

Rule no. 13
Drain capacitors before working near them and keep the short circuit on the terminals during the work to prevent electrical shock.

Rule no. 14
Never touch another person’s equipment or electrical control devices unless instructed to do so.
Don’t be too smart. Don’t try your luck.

Rule no. 15
Enclose all electric contacts and conductors so that no one can accidentally come into contact with them.
If applicable do it always, if not be very carefull.

Rule no. 16
Never handle electrical equipment when hands, feet, or body are wet or perspiring, or when standing on a wet floor.
Remeber: Gloves and shoes

Rule no. 17
When it is necessary to touch electrical equipment (for example, when checking for overheated motors), use the back of the hand. Thus, if accidental shock were to cause muscular contraction, you would not “freeze” to the conductor.

Rule no. 18
Do not store highly flammable liquids near electrical equipment.

Rule no. 19
Be aware that interlocks on equipment disconnect the high voltage source when a cabinet door is open but power for control circuits may remain on.
Read the single line diagram and wiring schemes – know your switchboard.

Rule no. 20
De-energize open experimental circuits and equipment to be left unattended.

Rule no. 21
Do not wear loose clothing or ties near electrical equipment. Act like an electrical engineer, you are not on the beach.

Example of human stupidity and ignorance of basic safety

Electrical safety, come on… I guess we’ll never know did the cord extension drop into water… Hope not

20/05/2026

know? The danger of "using" fall prevention devices (May cause death in 15 minutes)

Do you know? The Hazard of "used" Falling prevention equipment (You can died within 15 minute)

Protection Equipment if incorrectly selected or without a rescue plan when a worker falls and hangs in the air May cause injury Or can die !!!

prevention devices, which many of you may call incorrectly as fall prevention devices or fall protection belts, are names that may be misleading. Due to the said equipment Does not help prevent falling from a height in any way

*** Such equipment Is just a deterrent for the fall phase when falling Not let people hit the ground or reduce the injury of the first pull from the belt (Harness) when falling from a height But if choosing the said device is not suitable for the job Or without a rescue plan It may cause people who fell seriously injured or died as well. Although the device is to be used at high altitude

prevention devices are considered PPE (Personal Protective Equipment) or injury prevention equipment. Which is worn on the body With related equipment as follows

1. Body Harness or # seat belt type (Should choose to use the full type To prevent spine injuries in the lumbar region If falling from a height)

2. Double Lanyard with Shock absorber is Lanyard with a first shock absorber. The need to use double lines For safety while having to disconnect one cable To attach to another position At that time The other strand also has to be hooked around the anchor point or strong steel beam. Can support the weight of people If dropped safely, the shock absorber device will reduce the initial shock. Prevents injury or fractures of bones and muscles in the second fall

*** danger of choosing to use fall prevention devices Inappropriate

1. the wrong type of device / unsuitable for work characteristics, such as using half-body harnesses (only around the waist) or using a single lanyard or without a shock absorber

* use a lanyard or life line that is too long or * hook in to the position of the foot / too low Resulting in excessive fall Until the victims hit the ground Or injured by power surges

2. of damaged equipment, torn, stained, expired, not inspected before use

3. wear, such as wearing a seatbelt, preventing falling too loose or too tight or taking a snap link In the inappropriate spot

4. that operates at a height If it is very far from the Lanyard's anchor point and the anchor point when it falls * it may cause centrifugal force. And then hit the wall or the steel pole also died

*** of falling from a height Despite having a fall prevention device But without a rescue plan

content in this section is very important. And is something that many people overlook Because I understand that Having a fall restraint belt is enough to prevent the worker from falling and hit the ground to injury or death. Without a plan to save a life People who fell from a high place And suspended in the air within 5 minutes, which could cause the victim to die !!! As follows

workers fall from a height And hung in the air His body will have the following effects:

- As soon as it falls Will cause a surge May cause bone or muscle injury

- After 5 minutes, if still hanging Blood will not circulate. To raise the leg area Because of being constricted May cause acid And toxicity in the bloodstream Affects the muscles And every part from the groin down

- After 15 minutes, if still hanging Will affect the work of the heart Cause unconscious shock after that will affect breathing. The function of the lungs, heart and brain, abnormal blood flow rate, heart failure and oxygen supply to the brain are inhibited, the brain is destroyed, resulting in death !!!

# Therefore, even using the fall prevention device correctly Must not forget that there must be a plan And equipment for saving lives As well as to always have the plan rehearsed In order to practice correctly And fast when actual events occur

of life saving for those suspended from falling from a height, such as using stairs, scaffolding, or whatever Scisor Lift is the fastest, or using a rope to tie a loop or monkey ladder to the person Had the reason of climbing back up

, things It is the duty of the Provincial Waterworks Authority at various levels, including the supervisor or supervisor to know And realize when working at high altitude To be able to choose the right equipment And act correctly in the event of an emergency

20/05/2026

Best For Beginners

20/05/2026

WORK

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lifting heavy objects safely with crane

In lifting heavy objects The danger that often occurs is the loss of the things that lift the heavier the weight. And the lifter is near the radius That item will fall over, that is the accident that will occur from heavy objects falling over it. For the safety Throughout the movement of our things

are 6 important steps # to deposit for everyone as follows
Lifting workers must follow this strictly.
Must prepare lifting equipment To be in a safe condition according to standards

a position that is out of range That can fall over
Lifting test to check the equilibrium Before moving
Move with pleasure
Gently put things down.

the slings while releasing must ensure that The sling is not snatched.

are the work steps We can do Which aside from the above steps Must also check the condition of the handler every time

" not allow people with physical conditions that are not ready. Definitely use the crane. "

slings Another thing that must be checked regularly for confidence.
Defining work procedures as a standard Regardless of changing workers, they still use the same standards, which will allow employees to follow every step.

lifting Across the heads of other people who are working
Stop if something goes wrong with the lifter, the lifted device or the environment.

supervisor immediately If something goes wrong
Stop if something goes wrong with the lifter, the lifted device or the environment.

20/05/2026

ON A CONSTRUCTION SITE NEAR MY OFFICE

Yes we can all see the obvious, an unsafe condition, an unsafe act the worker in not wearing a safety harness!

If you were the HSE Professional on this site do you

A: Break his concentration and risk him falling by shouting to him to come down and get a safety harness. Or

B: With the supervisor go to his location wait for the worker to get to a position of safety then 'talk' to him?

20/05/2026

20/05/2026

What is direct and indirect cost in industry or construction?
A direct cost is a cost which can directly be associated with a particular department or business project or production of goods or services. Direct costs are usually fixed in nature, but they change with the change in the amount of production.

Direct costs are easy to calculate
Examples of Direct costs

1..Material required for the production: you cannot produce something without using raw material. The raw material is the best example of direct cost as it is directly used in the production process.

2..Labor Costs: Labor is required to carry out any work in the production process labor work to produce goods. The labor cost is another good example of direct cost.

Tools, equipment, and fuel expenses: A production process requires various things such as tools, equipment, and fuel to carry out the production process. The cost of such things which are directly used in the production process is considered as direct costs.

INDIRECT COSTS are the costs which cannot be directly associated with a department in the organization or a production process or business project. These indirect costs are associated with things which are used for multiple purposes in an organization.

Therefore, these costs are usually divided between all business processes. Click here to learn more about indirect costs.
Indirect costs are not easy to calculate
Examples of Indirect costs

1.Building rent:
A building is a must to carry out the production process. Therefore, the rent that you pay for the building or its depreciation value is considered as indirect costs. As various other processes take place in the building.
Some more Examples of indirect costs are:
Accounting and legal expenses.
Administrative salaries.
Office expenses.
Security expenses.
Telephone expenses.

20/05/2026

What to do to protect someone's life from electric shock 👇

09/08/2021