Container in moulded self-extinguishing polyamide resin V2 natural color. Insulating base moulded in self-extinguishing polyamide 6, VO at 0.75 mm (UL-94) and CTI 600 (according to IEC 112). Terminals in aluminium (EN 46100) with anti-corrosion surface treatment, 3-ways for pole. Base and cover moulded in self-extinguishing VO (UL-94) polyamide resin reinforced with fiberglass. Conductors locked separately with AISI 304 stainless steel notched screws. Voltage rating 450 V; max current 63 A. Sectionable fuseholder for 8.5 x 31.5 cartridge fuses - 380 V - max 20 A. Voltage rating 500 V. Fuse clips in Ot 58 (UNI 5705) with spring. To recess into poles with a diameter of at least 101 mm using 45 x 186 mm hatches with semi-rounded ends. Class II (double isolated) container in compliance with CEI 64-8/4. Protection degree: IP 43 degree of protection on cover perimeter; IP23B in cable inlet zone (in compliance with CEI EN 60529 standards); IK 08 according to standard CEI EN 62262.