||If a fire short-circuits a device in a branch of a fire-resistant circuit, it may paralyze the entire circuit. This can be avoided by adding a fuse element to the fire protection junction box to separate the device from the main line. The fuse element containing a 2A fuse is supplied installed inside an M25 cable gland, and it is to be placed outside the junction box. This way, it does not take up wiring space inside the box. The fuse element contains two 1.5mm2 wires, the length 200 mm.