Why are there load ratings for power distribution equipment?

There is definitely a difference in costs, as primary load applications require dual power supply.

Article 2.0.1 Electric power loads shall be classified according to the requirements for power supply reliability and the degree of loss or impact caused by power outages in terms of ** and economics, and shall comply with the following provisions: 1. A load shall be classified as a Class 1 load under one of the following circumstances: 1. Power outages will result in casualties. 2. Power supply will be interrupted when it causes significant ** and economic losses. For example: severe damage to major equipment, significant scrapping of products, large-scale rejection of products manufactured from key raw materials, and disruptions to the continuous production processes of key enterprises in the national economy that take a long time to recover. 3. A power outage will disrupt the normal operations of electrical users of significant ** and economic importance. For example: important electrical loads in facilities such as key transportation hubs, important communication centers, major hotels, large sports venues, and public places where large numbers of people gather and are used for international events. Among primary loads, those for which a power outage could lead to poisoning, explosions, fires, etc., as well as those in particularly important locations where a power outage is not permitted, should be considered especially important loads. II. A load shall be classified as a Class II load under one of the following circumstances: 1. When a power outage will cause significant losses in terms of ** and economics. For example: damage to key equipment, large amounts of products being scrapped, disruptions in the continuous production process that take a long time to resolve, and significant reductions in production volume for key enterprises. 2. A power outage will affect the normal operation of important electrical users. For example, important electrical loads in facilities such as transportation hubs and communication centers, as well as important public places with large crowds like large theaters and shopping malls, where a power outage would lead to chaos. III. Those that do not fall under category 1 or category 2 loads should be classified as category 3 loads.

Oh, so level 1 and level 2 cannot be shared, but the wires of level 2 and level 3 can be shared?

Primary and secondary loads can be shared, but a backup power supply is required for the primary load.

A load classification is necessary to develop a power supply design plan

The investment associated with each load level corresponds to the power supply configuration plan

For electrical design, the most important first step is to determine the electrical load class.

I’m just starting to learn about electrical knowledge; it’s so difficult