The main current circuit uses screw-type terminals accepting 2x (0.5...1.5 mm²) solid or 2x (0.75...2.5 mm²) stranded, with a max of 2x (0.75...4 mm²) — typical for panel wiring up to 4 mm² without needing ferrules. Front and terminal protection is IP20, so it's suited for enclosed installation where accidental finger contact is the concern, not washdown environments.
The 24 VDC coil draws its rated current at nominal voltage; the contactor holds in down to about 18 V before dropping out, so a saggy DC bus from a long cable run or shared power supply can cause chatter. The AC-1 resistive load curve goes to 10 A at 400 V, but for motor duty the AC-3 rating at 400 V is 3.5 kW — that's the number you size the overload relay against, not the 10 A headline.