XPost: uk.radio.amateur, free.uk.amateur-radio, rec.radio.info

SADARS

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31 March 2022 - PME and Radio amateurs by Richard, G3NII

Posted: 01 Apr 2022 03:20 AM PDT
https://sadars.co.uk/wp/archives/3093


Richard started by detailing the various systems of mains connections to private properties. Houses built from about 1970 are likely to be
configured as PME: Protective Multiple Earth.  For most houses this is sufficiently safe.  However, radio amateurs face a possible catastrophic failure if there is a break in the protective multiple earth lead (possibly cause by nearby construction work etc.) and their station is conneted to an
RF earth that becomes the earth for the PME system.  These breaks have 
been reported about 400 times in the past year. Richard outlined what radio amateurs with the PME setup should be doing about the perceived need for an
RF earth connection: Dont do it!   Richards full presentation can be read  at our website under the tab Practical Stuff  titled Earthing and RF

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