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Solved: External HDD Power Adaptor: matching of amps?

Discussion in 'Hardware' started by Addiead0725, Nov 9, 2011.

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  1. Addiead0725

    Addiead0725 Thread Starter

    Joined:
    Jun 14, 2004
    Messages:
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    Hello all,

    I'm currently at work and being a new IT tech, I'm fuzzy about amp measurements in terms of power supplies and their matching power cords (that plug directly into electrical outlets). I have an external HDD that requires a 12V 4.0amp power adaptor and I have found a brick piece that will handle the power correctly for the HDD. As for the secondary cord that plugs into the outlet and the brick, I could only find a cord that can handle 2.5amps (at least thats what the tag on the wire says). I'd like to know if this will or will not work, and any advice on the relative subject would be much appreciated. Thanks in advance.
     
  2. Lozzy-loz

    Lozzy-loz

    Joined:
    Feb 5, 2010
    Messages:
    624
    Assuming the polarity of your brick is correct there should be no problem.The 2.5a power cord is designed for mains voltage in New Jersey is that 112v?.Volts times amps=watts so 112 time 2.5=280watts.The 4amp brick at 12volts would only be running a maximum of 48 watts.
     
  3. Addiead0725

    Addiead0725 Thread Starter

    Joined:
    Jun 14, 2004
    Messages:
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    ok thanks for clearing that up lozzy, I just didn't want any chance of that cord melting or damaging anything to the external HDD.

    I appreciate the basic physics lesson haha, worked out to my benefit since it solved my support request here at my firm. thanks again
     
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