Ex wall socket for zone 2, 16 A, 4-pin, 600-690 V, 5 h, cable entries: 1 x M25, plastic, cable entries/housing holes: 1 x plastic cable entries M25 for Ø 8 - 17 mm, 1 x M25 Ex screw cap plastic, housing material: glass fiber reinforced polyester, polyamide, rated voltage: up to 750 V AC, frequency: up to 400 Hz, rated current: 16 A, marking according to 94/9/EC: Ex II 3 G Ex nC IIC T5/T6, EC type examination certificate: PTB 99 ATEX 1115, permissible ambient temperature: -20 °C to 40 °C, dimensions (L x W x H): 236 x 110 x 147 mm, weight: 1.8 kg, Protection class: I, Protection type according to EN 60529: IP66,