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In simple terms, whenever a fuse 'blows', the resulting gap in the melted element must be great enough to prevent the voltage across that gap from maintaining or re-igniting the resulting arc. So, in addition to their current rating, fuses are also rated according to the voltage at which they are designed to operate.

So, if you were to use a 32-V fuse in a 250-V circuit, it is likely that it will not be able to extinguish the resulting arc when the fuse operates, and the circuit will not be protected properly.

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NO! There are 50 bulbs in a 2.5 volt string or 125 volts. There are 35 bulbs in a 3.5 volt string or 122.5 volts. If you put 50 3.5 volt bulbs in you will have 175 volts and most american house have 110 volt service so you will have dim bulbs.


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