The selection of electrical equipment in the distribution box or distribution cabinet needs to be evaluated and selected according to actual needs. Here are some reference factors:

Load type and size: The type of load (eg lighting, motors, electric heating, etc.) and load size needs to be evaluated to determine the switches, fuses, fuses, etc. required.

Type of power supply: The type of power supply (e.g. single phase, three phase) and voltage level needs to be evaluated to determine the required main switch, contactor, etc.

Safety requirements: It is necessary to evaluate the safety requirements of the equipment, and select switches and leakage protectors that meet the standards.

Equipment quality and brand: It is necessary to choose equipment with reliable quality and well-known brands to ensure long-term stable operation and convenience of maintenance.

Rated current and voltage: It is necessary to select the corresponding switches, fuses, fuses, etc. according to the rated current and voltage level of the electrical equipment.

Space and layout: It is necessary to select electrical equipment of appropriate size and shape according to the space and layout inside the distribution box or distribution cabinet.

To sum up, the selection of electrical equipment in the distribution box or distribution cabinet requires a comprehensive assessment of the actual needs and requirements, and selection of reliable, standard, and suitable equipment.