Cross-section dependent on conductor type (see the Technic + Documents)
for round and sector-type conductors
for Cu/Al conductors stranded (s), flexible (f) for direct connection
for copper rail 20x10mm up to 30x10mm
for busbar system 400 A L1-L3, 630 A N + L1-L3
Before connecting, aluminum conductors must be pre-treated according to the appropriate technical recommendations, see technical information aluminum conductors