Spur Cable questions

Hi Peter,

1. I would really go with 10mm, but you seem to have made your mind up already. Don't forget most of the benefit you hear from a dedicated supply is down to the size of the conductors you use, that is my opinion, there will be a post after my one saying "absolute rubbish, 6mm sounds better than 10" etc etc.
Will you sit listening, amazed at the benefits of the dedicated supply, wondering how much better the bigger cable would have sounded?

The earth contained in any given twin & earth cable is more than adequate.

2. The cable will have to be stranded, you wont find a solid 6mm conductor, unless you're using pyrotenax (mineral insulated cable - very expensive).

Regards,
Mark

Likewise, if you're going to the trouble of putting a 6mm cable in, you'd be daft not to put in 10mm, unless there's some physical reason for not doing so. It's a no-brainer!

I assume this is going to a dedicated consumer box and/or a 32 amp MCB with an RCD (or RCBO if combined)

While you're at it, get your sparks to put in an earth spike (outside!!!!) and bring in 6mm earthing cable. That'll sort out any sonic deteriration from a lacklustre earth.

However, you may be in a flat on the tenth floor, so that could be a logistics nightmare!

Hi Peter,
My Electrician installed a dedicated radial circuit last year for my system just prior to the new regulations coming in regarding rcds which now have to be fitted/and wired into all new circuits.
I opted out having the above installed on grounds of better sound quality, but went for 6mm cable as my Electrician said that 10mm is very hard to work with and would be difficult to terminate effectively at the wall socket!
However he fitted a 16amp mcb at the dedicated consumer unit for fast tripping protection, but advised against an additional earth spike outside in the garden as in most cases the earth impedance would be higher than that of the earth house wiring. Cheers.

If you cant find this thread later today, chances are it is in "Padded Cell"..... most unfortunately.

I can't understand why you would put 6mm in rather than 10mm? 10mm cable is not that much more difficult to work with and will fit into most decent double sockets.

I think the quality of the earth is important, but agree with Jonathan that local earth spikes have a higher impedance which is important from a safety perspective. Ideally you would wish to connect signal earth to a local rod - buried deep in nice damp soil, but keep chassis earth tied to the mains earth. This would give you a very stable signal earth refrence, but a low impedance protective earth. As this is difficult to acheive (building regs) the next best option is a low impedance dedicated earth back to your supply cut-out. 10mm twin and earth has a 4mm earth wire, so if you follow my earlier advice you get this anyway which answers your original question.