Electrical installation calculations:

 

 In first example I set 17 floors in house, barier direct D and ked 0.6 (no thermal

equipment in houses) and result give me 180 [mm2] 3 phases wire

 

When I change to enclosed type B there is 120 [mm2] conductors

 DEMO :

http://testtesttest.ddns.net:8282/ords/f?p=130

http://testtesttest.ddns.net:8383/apex/f?p=130:380