How to distinguish power box, distribution box, household box and meter box? What are the components in the box? How to calculate the size of their boxes?

We all know that there are many kinds of power distribution facilities in power equipment. There are countless relationships between them, such as power box, distribution box, household box and meter box. They are a headache for many people! Today, the meter box manufacturer will tell you "how to distinguish the power box, distribution box, household box and meter box? What are the components in the box? How to calculate the size of their box?" You should take a closer look at what you need to know!

Power box: refers to the distribution box with control system, generally including fire control, exhaust fan, fire fan, etc.

Generally, there are circuit breakers (divided into two types according to the requirements of power consumption, namely miniature circuit breakers, that is, modular switches and molded case circuit breakers, that is, air switches), contactors, thermal relays, terminals and fuses.

Distribution box: refers to low-voltage non-standard box and cabinet, and is also the general name of power box, household box and meter box.

Household box: it refers to the small box similar to the door of the commercial house (pz30 standard box is mostly used for commercial houses, and non-standard box is mostly used for public parts. Household box is often used for lighting, so it is also called lighting box.

Generally, circuit breakers are installed.

Electricity meter box: refers to the distribution box installed in the shaft and strong current room. The main purpose is to install electricity meters in the distribution box and measure the power consumption of each user.

Generally installed components include circuit breaker, electricity meter, terminal and fuse.

The box size is calculated as follows:

1. A certain distance shall be reserved at the upper end of the main switch (for incoming cables on the construction site)

2. There is a certain distance from the lower end of the main switch to the first row of sub switches (for workers to install copper plates and wiring)

3. The first row shall be separated, and a certain distance shall be reserved for the second row of sub switches (for workers' wiring and site outgoing line)

4. A certain distance shall be reserved between the second row of sub switches and secondary elements (for workers' wiring and site outgoing line)

5. The last row of elements shall be kept at a certain distance from the bottom of the box (for outgoing line on site)

Note: the above "certain distance" shall be determined by the current of the element and the wire diameter of the copper plate and wiring.