A distribution box is an electrical enclosure used to house and protect electrical wiring, connections, and components. It is designed to distribute electrical power to different areas or devices in a building or facility. Here are some types of distribution boxes commonly used in electrical installations:
- Main distribution board: The main distribution board (MDB) is the central distribution point for electrical power in a building or facility. It receives power from the utility supply and distributes it to different sub-circuits throughout the building.
- Sub-distribution board: A sub-distribution board (SDB) is a smaller distribution box used to distribute power to specific areas or devices within a building. It is connected to the main distribution board and may have circuit breakers or fuses to protect against overloading.
- Junction box: A junction box is a distribution box used to join and protect electrical wiring. It is used to connect wires from different circuits and may contain terminal blocks or connectors.
- Terminal box: A terminal box is similar to a junction box, but it is designed to house and protect terminal blocks or other types of connectors. It is used to terminate and connect wires from different circuits.
- Floor distribution box: A floor distribution box is a type of electrical enclosure that is installed in the floor. It is used to distribute power to electrical devices in a specific area, such as a conference room or office cubicle.
Overall, distribution boxes are an essential component of electrical installations, providing a safe and organized way to distribute power to different areas and devices within a building or facility. They come in different sizes and types to suit different applications and can be customized to meet specific requirements.
Here are the general steps for installing a distribution box:
- Choose a suitable location: Select a location for the distribution box that is easily accessible and away from potential hazards such as water or heat sources.
- Turn off the power: Turn off the main power supply to the building or area where the distribution box will be installed.
- Mark the mounting holes: Hold the distribution box against the mounting surface and use a pencil or marker to mark the location of the mounting holes.
- Drill the mounting holes: Drill the mounting holes using a drill and suitable drill bit. Make sure the holes are the correct size for the screws that will be used to attach the distribution box.
- Attach the box to the wall: Place the distribution box over the mounting holes and insert screws into the holes. Use a screwdriver or drill to tighten the screws.
- Install the circuit breakers: Install the circuit breakers or fuses in the distribution box, following the manufacturer’s instructions. Make sure the breakers are rated for the correct voltage and amperage for the electrical system.
- Connect the wires: Connect the wires to the appropriate terminals or connectors inside the distribution box. Use wire nuts or other suitable connectors to join the wires securely.
- Label the circuits: Label each circuit with a suitable label or tag to identify the area or device that it supplies power to.
- Close the distribution box: Close and secure the cover of the distribution box, following the manufacturer’s instructions.
- Turn on the power: Turn on the main power supply and test the circuits to ensure they are working properly.
It is important to follow local building codes and regulations when installing a distribution box. It is also recommended to hire a licensed electrician for complex installations.