An electrical device having a housing containing at least one electrical component and an automatic fire prevention or extinguishing system with at least one heat and/or smoke sensor, the at least one heat and/or smoke sensor is operably connected to a container holding a fire-retarding, fire-extinguishing or fire-prevention material and the container is arranged to dispense the fire-retarding, fire-extinguishing or fire-prevention material into the housing and/or onto the electrical component when the at least one heat and/or smoke sensor detects heat and/or smoke inside the housing, as the fire-retarding, fire-extinguishing or fire-prevention material is dispensed through at least one conduit operably connected to the container holding the fire-retarding, fire-extinguishing or fire-prevention material. Each conduit is arranged to track electrical wiring of the electrical device or track at least part of an outer surface of at least one electrical component of the device.