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Cable Current Carrying Capacity

JD

A very basic question

Current carrying capacity of a cable. My understanding is that if I have a cable rated to 6amps this cable will always only ever be able to take 6amps.

I have been suggested that this rating is only true at 230v and that if I was to drop the voltage the current capacity of the cable may increase. My understanding is this is not related, and even at 12v the cable would still only be rated to 6amps?

Thank you for your help!

Parents
  • 0

    The idea is to limit the temperature of the conductor, the greater the current the greater the heat loss of the conductor.

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  • 0

    The idea is to limit the temperature of the conductor, the greater the current the greater the heat loss of the conductor.

Children
  • 0 in reply to Stuart Urban

    Or to put it another way..... the heat created due to the resistance of the wire is I^2 * R. The voltage has no role to play in this equation so changing the working voltage doesn't have any effect on the heated generated - only the current does.

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