Intrinsic safety has a unique advantage over other ignition protection methods. Because trained personnel can connect and disconnect live circuits, it is possible to remove and replace intrinsically safe devices in hazardous areas. Guaranteed safe even when a short circuit or lead breakage occurs, general purpose wiring methods are permissible in hazardous areas. Live maintenance can take place without shutting down the plant. Infallible, de-rated components ensure reliability. The bottom line is that intrinsically safe systems lead to cost savings in installation and maintenance.