Warning Signs Of Electricity: Common Examples & How To Prevent Electrical Hazard

Electricity forms an essential part of our everyday lives. It is a basic amenity present in most (if not all) homes and workplaces. However, you risk being electrocuted or starting an electrical fire if you are reckless. This is why proactive measures like warning signs and insulation are mandatory.

Electricity warning signs are primarily used on power lines or in areas with extremely high voltage. They can be handy in regular spaces like offices and companies needing electrical repairs. Besides, they are a reminder that you are about to enter a zone with little or no room for mistakes.

Insulation won’t do this. All it does is help you hold electrical devices without getting electrocuted. In some cases, installing warning signs follows legislative instructions to prevent accidents.

In this guide, I will explain what electrical warning signs are, the various types, what they stand for, and how to prevent electrical hazards.

What are Electrical Warning Signs?


Warning signs of electricity or electrical hazards are indicators designed to highlight the risks associated with a particular space. They can also be symptoms of an electrical system failure and cause severe damage if proper action is not taken.

Hence, when you use these signs with a black border and a text or a program displaying the presence of a charge, avoid such areas if you are not an electrical technician.

Examples of Electrical Safety Warning Signs

Warning signs of electricity combine words and symbols. Common examples include:

1. Danger sign

A danger sign usually features the word “danger” and an enclosed triangle with a lightning bolt or exclamation symbol. It describes electrical areas capable of causing severe injury or death to humans or animals.

2. Caution sign

In this case, injuries are often minor and will likely not lead to death. The symbol uses the word “caution” and “electrical hazard” coupled with lightning.

3. Warning sign

Like the danger sign, a warning sign contains the word “warning” with an enclosed triangle featuring a lightning bolt. It is also a sign to prevent severe injury or death from electrocution.

4. Notice sign

The word “notice” is enclosed in a triangle with a lightning bolt in this symbol. Damage levels are also likely to be minimal in the event of electrocution.

5. Arc flash labels

Arc flash labels specifically list out the hazard information for an electrical device. They also offer guidance on choosing the best PPE for safe work.

6. Voltage markers

Voltage markers are orange labels with black text used for numbering electrical wiring and conduit in such a way that you know the amount of voltage in each line.

7. Electrical clearance signs

This symbol indicates the safe space to comply with any electrical operation.

Warning Signs of Electrical Hazard

Here, I will expose you to the various scenarios that may warrant placing a warning sign in an area or restricting access to only electrical professionals. They include:

1. Constant tripping of a circuit breaker

Circuit breakers are designed to prevent damage in an electrical system. As a result, they trip when there is too much load on the system or overheating. However, when a circuit trips recurrently, it indicates a short circuit, ground fault, or overloaded circuit.

2. Improper wiring 

Improper wiring is another hazard that can blow up a socket. Such outlets or switch plates often become hot without servicing any devices. You may need to remove or switch off such an outlet and schedule a professional appointment.

3. Flickering or dimming light

Frequent flickering or dimming simply means a loose connection somewhere within the system or voltage fluctuation. This may cause your light bulbs to glow too brightly or burn out faster than they should.

4. Smoke

Smoke is a major precursor of an electrical fire. It ensues when there is a short circuit and may give off a burning rubber (wire coatings) smell. If this occurs within a wall and catches surrounding materials, the fire may be difficult to extinguish.

Other symptoms of electrical wiring problems to note include buzzing or clicking sounds that may occur when you flip a light switch.  

How to Prevent Electrical Hazards

Aside from placing warning signs in high-voltage areas or locations under repair, there are steps you can take to mitigate electrical injuries:

1. Sensitize your family or coworkers

As simple as this may sound, it is one of the best ways to reduce electrical accidents at home or work. These teachings can be as simple as ensuring no electrical device stays plugged in after use or wearing protective gloves or coats when dealing with electricity. 

2. Moisture and water

Electrical systems strongly hate water or exposure to moisture. This is because water conducts electricity and can induce electrocution. Besides, exposing electrical materials such as wires or plugs to insulators may weaken their insulating rubbers.

When such protections wear off gradually, you risk exposing yourself directly to electricity. This is why it is important not to plug an electrical device into an outlet in a wet environment or with a wet body.

3. Never connect or disconnect under load

It is also not advisable to connect or disconnect electrical devices under load. The term “under load” describes a device already running on electricity. 

Disconnecting such devices directly from the outlet may create an electrically active arch. If any part of your body comes in contact with such an arch, you risk electrocution. Instead, switch off the device and the outlet first before unplugging it.

4. Inspect for improper or faulty wiring

Before working on any electrical system, it is important to inspect it for faulty or improper wiring. This may include checking for weird smells, sounds, or burns within the system.

If any of these symptoms exist, replacing such materials with new ones is also best.

5. Turn off the power

Standard practices also encourage switching off an electrical system before commenting on any operation. You can switch off the circuit breaker in your home or unplug the cord of any appliance you plan on inspecting.


What are the warning signs of electrical wiring?

Warning signs of problematic electrical wiring include:

  • Dimming or flickering lights in bulbs
  • Blown fuses
  • Sparks
  • Weird smell

What are the 4 electrical faults?

Major types of electric faults include high resistance, open circuit, short-to-power, and short-to-ground.

How do electrical fires in homes start?

Electrical fires usually begin with the explosion of electrical outlets or appliances. 

If this explosion occurs in an area with other highly flammable materials, electrical fire ensues.


Warning signs of electricity play a major role in preventing electrical hazards in small spaces like your home or big factories and construction sites. For example, electrocution can result in various injuries, from unconsciousness to death.

These signs or symbols may take the shape of caution or warning signs and may be installed permanently in areas with constant high voltage and temporarily in areas under repair. The colors or pictograms on these signs may also change, but the message is always the same.

I hope you found this guide helpful. Have you thought of how to preserve your food in the case of an outage, learn how to safely keep your food warm without electricity.

Thanks for reading.