Making cheap stereo. Do i need ground?

Discussion in 'General Electronics Chat' started by str1fe, Sep 25, 2018.

  1. str1fe

    Thread Starter New Member

    Feb 19, 2018
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    Hi, i just bought a cheap amplifier board from ebay, and a power supply (24v). After connecting the wires i started wondering if i need to connect the earth cable. My power input cable has only two wires, and no ground, but the power supply have a ground input.

    IMG_1834.JPG

    The power supply looks almost like this in the front (sorry did not take pictures before i closed the box). I connected only to N and L, but not ground.
    strømforsyning.jpg

    Do i need to have ground connected, is there some chance of danger if i do not connect it? Many of my wall sockets does not have ground in them
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    5,670
    By rights You should have an earth ground on the P.S. terminal provided.
    Max.
     
    -live wire- likes this.
  3. BR-549

    AAC Fanatic!

    Sep 22, 2013
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    What country are you in?
     
  4. str1fe

    Thread Starter New Member

    Feb 19, 2018
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    Norway
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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    5,670
    I seem to recall Norway has mainly 220v L & N but rarely grounded sockets, If using it this way , I would ensure the whole system is enclosed in a non metallic enclosure.
    Max.
     
  6. paulktreg

    AAC Fanatic!

    Jun 2, 2008
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    Your power supply isn't double insulated and includes an earth connection that should be connected.

    However I see there are Type C (No earth) and Type F (Earth available) sockets in use in Norway. Connect the earth if you can or follow the advice of Max.
     
    -live wire- likes this.
  7. str1fe

    Thread Starter New Member

    Feb 19, 2018
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    0
    Alright, thank you!

    There are some knobs on the amp board which are made of metal, and the speaker connectors, otherwise the enclosure is made of mdf wood material. Perhaps i should attempt to cover up some of it with some epoxy silicone like sugru, to protect me.
     
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