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What are the common electrical signs?

What are the Common Electrical Signs?

Electrical signs are essential visual indicators used in various electrical systems to communicate important information
about the functioning, safety, and potential hazards associated with electrical equipment and circuits. Understanding these
signs is crucial for electricians, engineers, and anyone working with electrical systems. In this article, we will explore
some of the common electrical signs you may encounter.

1. Voltage Signs

Voltage signs indicate the electrical potential difference between two points in a circuit. These signs are crucial for
safety as they help individuals identify hazardous areas and avoid electric shock. The most common voltage signs include:

1.1 High Voltage Sign

The High Voltage sign is a yellow triangle with a black lightning bolt symbol inside. It warns individuals of the
presence of high voltage that can be dangerous or even fatal. You may find this sign near electrical substations, power
lines, or any other areas where high voltage equipment is present.

1.2 Low Voltage Sign

The Low Voltage sign is a blue rectangle with a black lightning bolt symbol inside. It alerts individuals to the
presence of low voltage, which may still pose a risk but to a lesser extent. This sign is commonly seen in areas where
electrical equipment operates at lower voltages, such as offices or residential buildings.

2. Warning Signs

Warning signs in electrical systems are used to highlight potential hazards or dangers. These signs often feature
attention-grabbing symbols or text to ensure that people take appropriate precautions. Here are some examples of warning

What are the common electrical signs?
 What are the common electrical signs?

2.1 Electric Shock Sign

The Electric Shock sign consists of a yellow triangle with a black symbol representing a person receiving an
electric shock. This sign serves as a reminder to be cautious of live electrical parts and to follow safety procedures to
avoid electric shock.

2.2 Fire Hazard Sign

The Fire Hazard sign is typically a red rectangle with a black flame symbol. It indicates the potential risk of
fire associated with electrical equipment or circuits. This sign helps individuals identify areas where fire safety
precautions must be taken.

3. Prohibition Signs

Prohibition signs are used to prohibit specific actions or behaviors in areas with electrical equipment. These signs aim
to prevent accidents, injuries, or damage to equipment. Some common prohibition signs in electrical systems include:

3.1 No Entry Sign

The No Entry sign features

The No Entry sign features a red circle with a white background and a black symbol depicting a person with a cross
through it. This sign indicates areas where unauthorized personnel are not allowed to enter. It ensures that only
qualified individuals with proper training and authorization access potentially dangerous electrical areas.

3.2 No Smoking Sign

The No Smoking sign is recognizable with a red circle and a diagonal line crossing a lit cigarette or tobacco
pipe symbol. This sign warns against smoking in areas where flammable materials or potentially explosive atmospheres may be
present. It helps prevent fire incidents that could be caused by a spark from a cigarette or open flame.

4. Emergency Signs

Emergency signs in electrical systems are designed to provide clear instructions and guidance during emergency situations.
These signs aid in the safe evacuation of people and the proper response to emergencies. Here are a couple of examples:

4.1 Emergency Exit Sign

The Emergency Exit sign is typically a green rectangle with a white symbol of a running person towards an open
door. This sign marks the location of an emergency exit, indicating the path to follow during an evacuation. It is vital
for ensuring the safety of individuals in the event of an emergency.

common electrical signs

4.2 Emergency Stop Sign

The Emergency Stop sign often displays a red circle with a white symbol depicting a hand pressing a button. This
sign is used to indicate the location of emergency stop buttons that can immediately halt machinery or equipment in case
of an emergency. It enables swift action to prevent accidents or injuries.


Familiarizing yourself with common electrical signs is crucial for understanding the risks and precautions associated
with electrical systems. Whether it’s voltage signs, warning signs, prohibition signs, or emergency signs, each serves a
specific purpose in ensuring safety and preventing accidents. By recognizing and following these signs, individuals can
protect themselves and others while working or residing in areas with electrical equipment.


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