The fuse box found in older homes is a protective device that cuts off the electric current to a circuit that has shorted out or is overloaded. The box contains little screw-in glass or porcelain plugs, each with a little window showing a fusible link that will melt when the electricity flow exceeds the preset limit. This cuts the power to the circuit. Checking and changing a fuse can be accomplished without tools.

Look closely at each fuse. The window on a good fuse will be clear. The window on a fuse that has “blown” to cut off the power and protect the circuit will be cloudy black or gray. That is the fuse that needs to be replaced.Identify the circuit affected by the blown fuse. Go around the house turning lights on and off until you find the location where the lights don’t turn on. Turn off light switches and unplug electrical devices in that area before attempting a fuse replacement.

GRL TM type Switch Disconnector can help you achieve it .