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Earthing and the radio amateur

Stewart Mason
I've recently joined the IET forums. I replied to a  topic regarding amateur radio and PME on the old forum. Unfortunately I cant access the old forum anymore so I thought it would be best to start a new topic.


So. On the bench there is a transceiver with a metal case. Next to the transceiver there is a antenna tuning unit which is connected to a antenna system which is using an earth rod. Am I right in saying there is a chance of a potential difference between the two metal cases of the equipment regardless if it is a TT, TNS or TNCS?


What would be the ideal solution?  Put the shack on it's own TT supply and bond all the radio equipment back to the MET of the TT and if a earth rod is used for the antennas connect that back to the MET also?


If the TT system was not an option what would be best if the supply was a PME and you didn't want to use balanced antennas removing the use of an earth rod? 


To be honest I've never really given PME's and amateur radio much thought which in hindsight was probably a mistake. I do remember when I did my training an earth rod was recommended for the radios.


Apologies for being so random.


Stewart M0SDM
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    Clive Brittain:

    The Radio Society of Great Britain has a publication entitled "Earthing and the Radio Amateur".

    http://rsgb.org/main/files/2012/11/UK-Earthing-Systems-And-RF-Earthing_Rev1.3a-.pdf


    C.




    Some of that needs to be read rather carefully - e.g.



    It used to be the case that all extraneous-conductive–parts in a house with  TN-C-S needed to be bonded, but with the recent changes to the IET Wiring Regs if you have a supply totally fed from RCD or RCBO protection devices, this requirement is no longer mandatory.



    could be very misleading (it's not obviously within the context of supplementary bonding within bathrooms),


       - Andy.

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  • 0

    Clive Brittain:

    The Radio Society of Great Britain has a publication entitled "Earthing and the Radio Amateur".

    http://rsgb.org/main/files/2012/11/UK-Earthing-Systems-And-RF-Earthing_Rev1.3a-.pdf


    C.




    Some of that needs to be read rather carefully - e.g.



    It used to be the case that all extraneous-conductive–parts in a house with  TN-C-S needed to be bonded, but with the recent changes to the IET Wiring Regs if you have a supply totally fed from RCD or RCBO protection devices, this requirement is no longer mandatory.



    could be very misleading (it's not obviously within the context of supplementary bonding within bathrooms),


       - Andy.

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