What is the current carrying capacity of 3 * 150 + 1 aluminum core cable and how to calculate it

What is the current carrying capacity of 3 * 150 + 1 aluminum core cable and how to calculate it

Generally speaking, the current carrying capacity of 3 * 150 + 1 aluminum core cable is 300A regardless of laying, pipe laying, ambient temperature and other factors. The principle of cable selection is [simple algorithm]: if the cross-sectional area of the wire below 10mm2 (including 10mm2) is multiplied by 5, the current carrying capacity of the wire with the cross-sectional area is more than 100mm2 multiplied by 216mm

What is the difference between the air switch and the leakage protector? Which one is connected with the electric energy meter? Is the home main switch called the air switch or the leakage protector?

It will act and complete the disconnection protection
When the live line current and zero line current of the leakage protector are equal (equivalent to normal electricity), the combined magnetic field is zero, and the leakage protector will not trip; once the leakage occurs, the live line current flows into the earth through the electric shock, the live line current and zero line current of the leakage protector will show differences, and the leakage protector will cut off the power supply

What are the functions of air switch and leakage protector

1. As long as the function of the air switch is to open and send the switch with load, it will trip and power off if it exceeds its own load. Once there is leakage, it has no automatic tripping function. 2. As long as the function of the leakage protector is to trip and power off when there is leakage in the output circuit, it can also open and send the switch with load, but the number of times is limited, and it will not trip and power off if it exceeds its own load. It is better to use the two together

Difference of leakage protector of air switch circuit breaker
Air switch, circuit breaker, leakage protector, do these three refer to one thing? Is there any difference? I hope to list their models

Air switch circuit breaker, leakage protection circuit breaker, high voltage vacuum circuit breaker, molded case circuit breaker, universal circuit breaker, electronic circuit breaker, miniature circuit breaker, fuse circuit breaker
These are circuit breakers
The general function of air circuit breaker is over current trip. It is to protect electrical equipment
Leakage protector is over a certain current trip. Is to protect personal safety