This 100A rated 2 pole mains isolator switch offers a point of isolation between the DNO (distribution network operator) meter and the Consumer unit, so that the main fuse does not need to be removed and the incoming supply to the property can be isolated safely.Having a 2 part cover, the bottom incoming terminals can be lead sealed off to stop unauthorised access once installed. A 100A rated 2 pole isolating switch capable of taking 25mm incoming tails. · · · To go between the meter and the consumer unit · · Allows the power to be isolated easily without removing main fuse · · Two part cover to isolate incoming terminals · · Safety screw allowing wire seal to secure bottom cover