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A fuse.
a breaker or a fuses
It becomes hot to the touch. If the situation continues, then the device may actually produce smoke, and in the extreme, may glow cherry-red. If the device is not a light bulb or a toaster, then it's not designed to operate that way, and it is overheating.
electrical device
when it is in a rubber casing or its a cell phone
By overheating which will cause a change in the thermostat materials construction.
Some of the checks that can be done to an electrical device before checking electrical resistance include the proximity of other magnetic fields and other electrical circuits. Measure electrical resistance while at a safe distance from strong electrical circuits.
machine is an electrical device
Any electrical device that emits Light
which electrical wires bring electricity to an electrical device or motor The cable, otherwise known as the flex or the lead.
The device that protects the home from the start of an electrical fire is an electrical breaker or in some older homes a fuse system.
A fuse is a device used to keep electrical circuits from overheating is not a true statement. A fuse is used to protect the wire of the circuit from an over current being applied to the circuit. This over current could be caused by a couple of scenarios. Two non insulated conductors touching one another and creating a short circuit. Another cause could be an non insulated conductor touching adjacent grounded equipment. Whatever the cause the fuse will isolate the fault instantaneously.