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Lightning conductor for ametuer radio antenna mast - electrician says regular PVC sheated yellow green wire is ok from mast to earth rod

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As per title I am getting a corner of my house setup as a radio shack and wanted to protect it appropriately.

The antenna is made of fibre glass but sits on an aluminium pole that brings the total height to 10m tall (only house in the area).


We have agreed to setup an earth rod below the antenna mast and earth it but the question is - will regular 35mm green/yellow sheated earth be good enough to provide earthing for antenna mast while being exposed to the elements? How long will it last?


Any thoughts on the electrical setup for the radio? We are planning to use the same earth rod and make a TT island for the power socket that feeds the radio unit (as main electrics is PME). The radio will be fed electric connection through an MCB by taking power from the main distribution box protected by a Type 1/2/3 SPD (I have 3 phase 100A supply from DNO) and we will use the earth rod for earth supply.


The radio unit will be powered by a seperate consumer unit which gets it's earth supply from the rod (I might also get a Type 1 SPD in the TT island consumer box).


The antenna and the TT island powering the radio will be linked by a 700A rated earth bar enclosed outside the property in an IP65 enclosure.


Appreciate any thoughts on my setup.
Am I being overkill and do not need a TT island for my radio setup? Will earthing the antenna be sufficient?
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  • 0
    Earthing of a 33kV primary sub is outside my skill set. Is this an overhead or underground 33kV supply?


    In any case driving in an earth electrode near the 33kV transformer earth is likely to be dangerous as your earth electrode will be  connected to the HV earth via the soil.  In the event of a fault to earth on the HV a high voltage will appear on your earthing system, the voltage will depend if this is a hot or cold site. 


    You do not need the earth for propagation as you aerial is a near balanced impedance on the end of the co-ax.  Lightning protection, if required is a different matter. The usual method is to have a spark gap or surge protection outside near the ground connected to an earth electrode which is back to the question of the earth electrode. 


    I did a CPD on line course this week and on one of the slides shown was LPS protection for a roof mounted satellite disk. That was a a rod set off parallel to the disk terminating higher than the disk, the off set support was 2, about 2m long, GRP rods. 

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  • 0
    Earthing of a 33kV primary sub is outside my skill set. Is this an overhead or underground 33kV supply?


    In any case driving in an earth electrode near the 33kV transformer earth is likely to be dangerous as your earth electrode will be  connected to the HV earth via the soil.  In the event of a fault to earth on the HV a high voltage will appear on your earthing system, the voltage will depend if this is a hot or cold site. 


    You do not need the earth for propagation as you aerial is a near balanced impedance on the end of the co-ax.  Lightning protection, if required is a different matter. The usual method is to have a spark gap or surge protection outside near the ground connected to an earth electrode which is back to the question of the earth electrode. 


    I did a CPD on line course this week and on one of the slides shown was LPS protection for a roof mounted satellite disk. That was a a rod set off parallel to the disk terminating higher than the disk, the off set support was 2, about 2m long, GRP rods. 

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