The FuseBox circuit protection range of metal consumer units and protection devices, offers flexible versatile solutions for 18th Edition electrical installations. The 18th Edition range has been designed to allow a 2 module SPD to be fitted to the RHS of the incomer without affecting the number of usable ways. If an SPD is not required these additional 2 modules can be used for devices such as time clocks, installation contactors or a bell transformer.