What are electrical boards?

What are electrical boards?

The electrical panels are practically metal frames that are used to protect all the command and control components of any electrical system, be it from a basic circuit in a home to the components of a more complex one such as that of an industrial machine.

Electric board

Parts of a board

Although the sizes and shapes can vary depending on the application, there are essential parts that we can find in any electrical panel.



Exterior part that is responsible for protecting all the components of a control circuit, mainly we can find them in metal although on some occasions and depending on their application we find them in plastic.


Metal rails

These rails serve as a base to mount all the components that will be used to control the system.

Bus bars

These bars are of a conductive material and are used to supply the electrical current to the components of the board, they are usually used when a large amount of energy is needed.



They are plastic channels where the cables are placed to take them from one place on the board to another.


Terminal blocks

They are also known as terminals and they are practically electrical connectors that clamp the cable through a screw, these terminals are mainly used when the cables are going to leave the board to an external component such as a motor or an actuator.


 Cable press

They are also known as gland connectors and these are embedded in the electrical cabinet in order to safely transport cables from the outside to the inside or vice versa.

Electrical and electronic components

The components can vary according to the type of system that is needed, from a basic one with fuses and protections to a more complex one with Plc’s, contactors, motor starters, timers, etc.


Types of electrical boards

We can find and classify different types of boards either by their application or by their content.

A distribution board (TD)

These are responsible for distributing the electric current to different points in the system. Within this type we can find three different ones:

  •  Main distribution: they are those that connect directly to the power line and have a master or main switch capable of cutting off all power supplies.
  • Secondary distribution:   They are branches of the mainboard and are responsible for controlling small parts of the system.


Motor Control Center (CCM)

This board is characterized by having as main components contactors, relays and all kinds of components that are used to control electric motors.

Ccm board

Lighting and load centers

They serve to distribute small electrical charges such as contacts and lighting.


Power control

The main feature of this type is that it controls a large amount of electric current ranging from 1,000A to 6,000A and voltages up to 600v in alternating current.


Protection, control, and measurement (PCM)

This type is composed of different self-supporting boards where each one of them is designed to fulfill a specific function such as control, protection, control and measurement.

PCyM board


It has the ability to support its own weight and is normally placed on a pedestal either fixed or anchored.

Self-supporting board


This type of board is characterized by being placed inside the walls and / or structures.

Recessed board