Which cable to choose on a line 60 meters long with a load of 312 amperes?
Good afternoon! I have three electric heaters of 72kW, 104A each each; I picked up a cable KG 3x35 + 1x10, Auto off. EZC250F 18KA 400B 3P / 3T 125A. Automatic machines put in this box-ShchMP-2 IP 31 (500x400x420) EKT. Total 3 machines for three heaters. Bought — Power Box YaRV-6224-250A. Now please tell me which cable is needed to power the nuclear power supply drawer from the substation. The distance is about 60 meters.
Good afternoon, here you need about 95-120 squares of copper, with open laying, and if the cable is aluminum, then about 150-185 mm² (better, a larger value). When laying in a pipe, a larger cross section is needed. More precisely, you can calculate the resistance of the core, it is standardized for each specific cable, you can search for this information in directories or state standard specifications for the cable you select. I also recommend reading the article - https://our.electricianexp.com/en/raschet-i-vybor-secheniya-kabelya-po-toku-moshhnosti-dline.html.
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