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The ampere rating of wire would depend on the diameter, length and usage of wire for specific purpose. Without additional input to the question. it will be hard to give an accurate answer.

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Q: What is the amperage rating for Rh wires?
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It is ok to use a fuse with a higher amperage rating and not ok to use a fuse with a smaller amperage rating why?

It is ok to use a fuse with a higher amperage rating and not ok to use a fuse with a smaller amperage rating why?


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The size of the conductor is in direct relation ship to its rating capacity of carrying a current. The larger the diameter of the conductor the larger the amperage rating capacity of the conductor.


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What is the amperage rating of 800 MCM Copper wire?

600amps


What is ampacity of 25mm cable at 250 volts?

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Why are conductors needed?

If you want to operate the conductors maximum capacity, the conductor needs the heat, that the amperage produces, to be dissipated. This is why in the electrical code book there are two amperage ratings. The first one is for a free air rating which allows for a high ampacity of the wire. The other rating is for three conductors in a conduit which confines the cooling capacity and so the ampacity rating of these wires is lowered. The same procedure is used in cable spacings in ladder tray networks.


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