The main contacts accept solid or stranded wire from 1 to 10 mm², and the coil auxiliary circuit takes 2x (0.5 to 2.5 mm²) solid or stranded.
Depth is 144 mm, so factor that into gland-plate clearance.
Rated operational current varies by voltage: at 24 V it's 6 A, at 48 V and 60 V it's 2 A, at 110 V it's 1 A, at 125 V it's 0.9 A, at 220 V it's 0.3 A, at 400 V it's 3 A, at 440 V it's 0.6 A, and at 480 V it's 7.6 A. At 230 V it's rated 1 hp. These are the contact ratings for the main poles — the 480 V 7.6 A figure is the highest, so if you're switching a 480 V motor under 7.6 A, this contactor handles it. Switching frequency: up to 1,000 operating cycles per hour for AC-1, AC-2, AC-3, and AC-3e duty; drops to 300 cycles per hour for AC-4 (plugging/reversing). Mechanical life is typical 10,000,000 operations.