Hello everyone. I am writing to ask you with what criteria you select the breaking capacity of a thermomagnetic, mostly for housing facilities. In the regulations of the AEA (Argentina) it says that the distribution company must provide the data of the presumed maximum short-circuit current in the terminals of the meter. But in practice, people who answer the phone, for example from Edenor, have no idea what the short circuit current is, and it is difficult to talk to someone who provides information on the subject. I understand that the most common breaking capacities are 3 kA, 4.5 kA and 6 kA. For example, I have 3 kA in my house. I live on a 9th floor and right next to the entrance of my building is the transformer. As far as I know, if the traffic is near, the short-circuit current is higher, so I don't know if the 3 kA I have in my house are fine ... Anyway, I would like to know if they are handled with any criteria to select breaking capacity in general, in homes. Of course, I thank you very much for all the contributions. Regards!

Although the DC level is 6KA, you can make sure and install 10KA thermo-magnetic break.

Hello, as for the thermal breaking capacity, the closer to the source (call transformer, socket of the company, internal of the building), the greater the short-circuit power (KA), it is recommended to place one of greater KA and as you say that you live in a 9 floor, look at the one in the meter room (main) after your meter, that is because of the greater short-circuit power, as they told you, you have thermal of 3 KA 4.5 KA 6 KA and 10 KA at Higher power of KA is the higher the price. Regards