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Single Core (Shielded) LV Cabling for Audio Equipment

Adrian B
Hi All


Quick question regarding suitable cabling for LV supplies to Audio equipment.....

I have a client (Sound Studio Designer) who is insisting on the LV power cabling to serve many different types of Audio equipment being shielded.  Firstly, I have never specified anything of the sort previously, normally specifying 6491 or 6242 etc., so is there something out there that is suitable?  Secondly, has anyone had any experience in this type of installation, and if so, what are the thoughts on single core or multi core cabling with shielding?  I personally would have thought that shielded singles would be the preference, but what do I know, I am quite obviously not a specialist in this field.


Any advice/ help would be hugely appreciated as always.


Thanks


Adrian B.
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  • 0
    Are you sure you are addressing the problem the "specialist" is concerned about? It is unlikely that noise radiated by mains cables will get into studio balanced audio cables if it is all installed properly. Good separation of mains and signal cables is should be managed carefully, and any problem is unlikely. The next step is to fit "proper" mains filters to the power entering the studio area, but these are both expensive and have very high earth leakage current, so excellent earthing is important. As far as possible there should only be one connection between the mains Earth and the audio equipment signal earth, to prevent circulating earth current in the audio cables. This may mean that class 1 equipment needs to have Earth cable connections removed, although it will be earthed via the audio cables. This is the kind of area where you really do need a proper studio Engineer, who has done all this before, to ensure that the finished system is safe. Studio systems do not usually use any single core screened cables for anything except guitar leads to the DI box.


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  • 0
    Are you sure you are addressing the problem the "specialist" is concerned about? It is unlikely that noise radiated by mains cables will get into studio balanced audio cables if it is all installed properly. Good separation of mains and signal cables is should be managed carefully, and any problem is unlikely. The next step is to fit "proper" mains filters to the power entering the studio area, but these are both expensive and have very high earth leakage current, so excellent earthing is important. As far as possible there should only be one connection between the mains Earth and the audio equipment signal earth, to prevent circulating earth current in the audio cables. This may mean that class 1 equipment needs to have Earth cable connections removed, although it will be earthed via the audio cables. This is the kind of area where you really do need a proper studio Engineer, who has done all this before, to ensure that the finished system is safe. Studio systems do not usually use any single core screened cables for anything except guitar leads to the DI box.


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