USB powered hub 3.0

Discussion in 'iMac' started by Imacer1962, Dec 27, 2014.

  1. Imacer1962 macrumors newbie

    Dec 27, 2014
    I just got my new 3.0 USB hub today. I would like to know is it okay to leave this hub on at all all times plugged into the wall? As well I would have powered USB devices plugged into this hub at all times. Is it okay. Thank You.:apple:
  2. Gav2k macrumors G3


    Jul 24, 2009
    Depends really on what's plugged in. Some portable hdd will not sleep
  3. Imacer1962 thread starter macrumors newbie

    Dec 27, 2014
    I have Western digital external drives plugged into the hub only. How can I check to see if they sleep.
  4. Xteec macrumors regular

    Sep 21, 2012
    Sleep your mac and listen to the hard drive. It should make spin down noises and then go to silent.

    When you wake your Mac, the hard drive will spin up and you should be able hear that.

    As to your original question, there is a small safety risk and it all depends on the quality of the USB hub and the items plugged into it 24/7.

    We Mac users are used to having high quality products that hide the fact electricity is dangerous because they have built-in monitoring and kill switches if a USB port draws too much power e.g. due to a fault.

    As an example, I had (what I thought) was a high quality mechanical keyboard with an embedded USB hub. I always leave my Mac on and I came home one day to the smell of burning plastic and saw the the keyboard (plastic) had melted around the USB hub.

    Luckily, the Mac had killed the power to the USB port and had a warning on the screen telling me that's what it had done.

    Something like this has only ever happened to me once, but it can happen.

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