Low Voltage Main Distribution Products
LY-MEB Equipotential Bonding Box
Product Overview丨
The equipotential bonding box is used in buildings to establish equipotential connections, ensuring that all exposed conductive parts of electrical and other equipment, along with metallic conductive components within the structure, are connected via conductors to either artificial or natural grounding systems. This minimizes potential differences throughout the building.
Equipotential bonding is generally classified into:
Main equipotential bonding
Local equipotential bonding
Supplementary equipotential bonding
Main Equipotential Bonding (MEB)
The LY-MEB Equipotential Bonding Box, also known as the Main Equipotential Bonding Box, is applied to the entire building structure. It plays a key role in:
Reducing contact voltage during indirect contact with electrical systems
Eliminating potential differences between different metallic parts
Preventing hazardous fault voltages introduced from outside the building via electrical lines or metallic pipelines
The MEB box typically connects the following conductive parts via the main equipotential bonding terminal bar, which is located near the main incoming distribution board:
The PE (or PEN) busbar of the main distribution board
Metallic utility pipelines, such as water, heating, gas, and drainage systems
The metal structure of the building
Artificial grounding electrodes, including their grounding conductors (if applicable)
Benefits and Importance in Residential Buildings:
After implementing a main equipotential bonding system in residential buildings:
It prevents electrical shock accidents caused by fault voltages introduced via the PE/PEN conductors in TN power systems
It reduces the risk of potential differences, arc formation, and electric sparks
It helps prevent electrical fires and protects personnel safety
It is an essential measure for lightning protection systems
Therefore, a main equipotential bonding terminal bar is generally installed at the building’s incoming power line, and it must be connected to all entering metallic pipelines and metal structural components.
Protection Degree：IP30~IP54
Equipotential bonding is generally classified into:
Main equipotential bonding
Local equipotential bonding
Supplementary equipotential bonding
Main Equipotential Bonding (MEB)
The LY-MEB Equipotential Bonding Box, also known as the Main Equipotential Bonding Box, is applied to the entire building structure. It plays a key role in:
Reducing contact voltage during indirect contact with electrical systems
Eliminating potential differences between different metallic parts
Preventing hazardous fault voltages introduced from outside the building via electrical lines or metallic pipelines
The MEB box typically connects the following conductive parts via the main equipotential bonding terminal bar, which is located near the main incoming distribution board:
The PE (or PEN) busbar of the main distribution board
Metallic utility pipelines, such as water, heating, gas, and drainage systems
The metal structure of the building
Artificial grounding electrodes, including their grounding conductors (if applicable)
Benefits and Importance in Residential Buildings:
After implementing a main equipotential bonding system in residential buildings:
It prevents electrical shock accidents caused by fault voltages introduced via the PE/PEN conductors in TN power systems
It reduces the risk of potential differences, arc formation, and electric sparks
It helps prevent electrical fires and protects personnel safety
It is an essential measure for lightning protection systems
Therefore, a main equipotential bonding terminal bar is generally installed at the building’s incoming power line, and it must be connected to all entering metallic pipelines and metal structural components.
Protection Degree：IP30~IP54
