This product provides a secure method for safely isolating the mains voltage supply to fire systems in accordance with BS 5839: Part 1 (2002). 
 
The unit is supplied in a complete enclosure, which is a standard single gang format with 
preformed holes for mounting on a surface or 20 mm conduit box. The unit can be accessed by 
rectangular surface trunking. Please follow the latest IET electrical wiring practices when 
installing the product