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davesparks
For the sake of say £20 on 5-10M run.. It really is a no brainer lads.! Are u seriously pricing jobs that close.. I pride myself on being a local spark and here for the long run on the local work i do! not it complies now and sod the future degrading and then its some1 else's problem! Didnt mean to offend you davesparks non ment, but reading back i see my bluntness!
If it is installed properly then there will be no issue with degrading. And if the armour does become corroded then the cable will no longer be fit for purpose regardless of how many unnecessary conductors are installed.
I look after installations with 2 and 4 core SWA submains dating back to the 1970s, where the armour is undamaged and fully working.