***Steemian Friends,*** Today, I will show Steemian friends how to install an electrical ***Main Distribution Board (MDB)*** used in homes. The MDB board plays a crucial role in the electrical sector of a house. I have first written the importance of the MDB board below. In the modern electrical era, the DB board has increased the beauty of electrical work. ![Electrical Tuttorial.png](https://cdn.steemitimages.com/DQmRqHy9JgsJFqHKKdNFKMFAZTx9QYvdXyFoFvYXHiT3tB5/Electrical%20Tuttorial.png) Design By Canva ***DB (Distribution Board):*** The DB board is of two types. - MDB (Main Distribution Board) - SDB(Sub Distribution Board) ![1000085608.jpg](https://cdn.steemitimages.com/DQmTyLMUYb3qDi71MePipV89VdguWgegM3RAnnLPw2r7r1A/1000085608.jpg) My home's electrical MDB board - The MDB Board acts as a separate security system for each room in the house. - The MDB board shuts off the power supply to prevent accidents in the event of an electric shock circuit. - By turning off the power supply to the room with the shock circuit, the power supply to the other room remains uninterrupted. - Electrical faults can be easily detected through the MDB board. ***Step 01:*** First, you need to calculate the electrical load of the house. I have purchased an MDB board by calculating the electrical load of a house of 15 amperes. I have shown below how to make an MDB board for a two-room house and mentioned the price of the MDB board through Steem. |MDB Box (Model:WDB-2DP-4W)|1 Pcs|380 Taka(Local)|21.2 Steem| |-|-|-|-| |Single-Pole Circuit Breaker|2 Pcs|360 Taka(Local)|20.1 Steem| |Double-Pole Circuit Breaker|1 Pcs|320 Taka(Local)|17.8 Steem| ![1000120943.jpg](https://cdn.steemitimages.com/DQmbV8EmuCGuEoX2qav2aeUyaPhb7Qu6VZiwBdMHBdtYU73/1000120943.jpg) Electrical MDB board ***Step 02:*** Then, I introduce the different parts of the MDB board. There is a base for installing the circuit breaker. This base is small or large based on the size of the MDB board. I made the MDB board for a two-room house, so it is small in size. ![1000120961.jpg](https://cdn.steemitimages.com/DQmZZxiUDsV4i8WBCgySHAkpTsueuHGGLAcwtPUDWEyqxsy/1000120961.jpg) Circuit breaker installation base Then I saw an electrical connector on the MDB board. This connector is where the electrical earthing and neutral connections are made. These connectors are very important. ![1000120962.jpg](https://cdn.steemitimages.com/DQmS6Wzphgj3asMbCTYvakTwz9hchGM16stm4rTWMPWxFnZ/1000120962.jpg) Earthing and neutral connectors ***Step 03:*** Then, I installed two 20-amp single-pull circuit breakers for the two rooms. There is a hook on the bottom of the circuit breaker which is used to attach it to the base. I have made a video showing how to install the circuit breaker. ![1000120956.jpg](https://cdn.steemitimages.com/DQmXxdhu3nMCPGCHYX6atpjDAnWEPb4FChLoqrLQDkzNQnC/1000120956.jpg) Single-Pole 20-Ampere Circuit Breaker Then I installed a 20-amp double-pull circuit breaker. The double-pull circuit breaker will act as the main power supply. The double-pole circuit breaker will be used to supply power to each room through a single-pole circuit breaker. ![1000120953.jpg](https://cdn.steemitimages.com/DQmXu1PrSbf5UcZi3ja7VjLJKmXfHmx9XBeSbHvhQFJ35vA/1000120953.jpg) Double-Pole 20 20-ampere circuit Breaker ***Function of Circuit Breaker:*** The incoming power supply will be provided through the double-pull circuit breaker. In case of a major electrical accident in the house, the double-pull circuit breaker will shut off the power supply to the entire house. Two single-pull circuit breakers will supply electricity to two rooms. These two circuit breakers will protect in the event of an electrical fault between the two rooms. ***Step 04:*** Then, I started attaching the top cover of the MDB board. There are four screws to attach the MDB board to the wall. I have shown the MDB board connected to a piece of wood with two screws. ![1000120965.jpg](https://cdn.steemitimages.com/DQmPCgGd2EEDcYdYbSmCbcxtiuBXs3GaMihAbRMjFrLzW2p/1000120965.jpg) DB box is being installed with screws when setting up Then I put the top cover of the MDB board on and locked it between the two screws. I have completed installing an MDB board for my 20-amp electrical load. ![1000120966.jpg](https://cdn.steemitimages.com/DQmXSKGck6JD84oi5BZhbuiG6E67Rp55i3zC3NHX3ycFQCm/1000120966.jpg) ![1000120950.jpg](https://cdn.steemitimages.com/DQmRYPqVTwQGRdhkKV8gBePz7eqtsCkRqytsLbeQjbHUVM5/1000120950.jpg) When installing a circuit breaker in the DB box Today, I have shown how to install the MDB board. In the next lesson, I will show you how to make the electrical connections of the circuit breaker. I have shown a video of my work below, which will be helpful for Steemian friends to watch and install the MDB board. ![1000120944.jpg](https://cdn.steemitimages.com/DQmYuj88N8TuCQhmU8kGADA8jCuqrFSnGe44Eb8FMsmaKy6/1000120944.jpg) After installing the circuit breaker in the DB box https://youtu.be/RjLObDYQPxI?si=U6ynQUiEd-RJROSv My YouTube Link ![Blue line.png](https://cdn.steemitimages.com/DQmVVSPBa5Y1aPXEJAb6vayhmUvFFBamSDJ55cwMaMKUEXV/Blue%20line.png) ![Steemit.com.png](https://cdn.steemitimages.com/DQmaivZxca3FGCxAXtH3aPvqvvijrhpGM8JUwBUsgX7WFk7/Steemit.com.png) ![image.png](https://cdn.steemitimages.com/DQmbSwPaX8NJFf2NREHoP1zwuy9MeUPsrFrCwoHBb6ELrWb/image.png)