Spelsberg Expansion enclosure / empty enclosure - Industrial Quality -, for small distribution boards AK 14-56, for individual expansion with standard rails or mounting plates, integrated ventilation elements to reduce the formation of condensate water, for installation of rail-mounted devices as per DIN 43880 model size 1-3, Un=400 V, Ui=1.000V AC / 1.500V DC, In=125A, with grey cover