Firemans Switch Robust & reliable design constructed from aluminum Operating handle locked in ''0'' postion and a two hand grip needed to reset for safety Easy to install and to operate 4mm 2 internal wiring terminal capacity 2 x M25 cable entries on top, 2 x M25 + 1 x M16 on the bottom Dimensions 150 x 127 x 77mm (HxWxD) Rear wall mounting holes 86 x 127mm centres, 5mm diameter IP65 rated Standards IEC60947-3 & BS7671