Johnell posted:

Many thanks for all of the extremely informative responses, all of my questions have been answered and this is what I plan to do:

Take a separate feed from a Henley block to a Memera consumer unit with Memera circuit breakers - run a single 10mm radial supply to an MK Logic unswitched socket - use 6mm cable to link to another double MK Logic socket - use the existing sockets to power the NAS and CD ripper.  

The best part is because it uses standard components it will be one of the cheapest SQ upgrades I can make.........fingers crossed it also gets rid of the buzzing.  

Not just the cheapest but probably the biggest and best too 

Mr Happy posted: 

Not just the cheapest but probably the biggest and best too 

Sounds too good to be true......I'll keep you informed.

Mr Happy posted:

John, I was refering to 1 radial circuit for each piece of kit. This is why I connected an earth between each, to keep the impedance in the individual earths as close as possible. 

If you are only running 1 10mm circuit, and putting the sockets side by side, then I doubt you would need to bother with interconnecting the earths.

 

Apologies for jumping on the OP's thread here. My equipment is rather conveniently on the other side of the wall from my electricity meter and existing consumer unit. Given this, I expect running a separate 10mm radial from a new dedicated CU to each (double) unswitched socket is a no-brainer (as opposed to linking the two with 6mm cable) ? There seems to be at least some doubt from other posters on the actual perceivable benefits of the former over the latter, but seeing as it would be easy to do in my home I figure I may as well do it.

I reckon four sockets would be enough for current and future needs.

Most power blocks or various audiophile sockets carry a rating of 16A. My stupid question is: why install a fat cable capable to carry 32A current when at end of the road it will be restricted to 16A? (Also power cords that finally reach the equipment have 16A ratings.)

Charnik,  the IEC320 plug(s) on the power cords  & the Naim power receptical male sockets are rated at 10A 

charnik posted:

Most power blocks or various audiophile sockets carry a rating of 16A. My stupid question is: why install a fat cable capable to carry 32A current when at end of the road it will be restricted to 16A? (Also power cords that finally reach the equipment have 16A ratings.)

You're right - the current capacity of the cable is well in excess of what is needed by the system. Ideally you want to try and keep the mains impedance as low as you can so using thicker gauge cable keeps this nice and low (especially if there is a long run between the CU and the Hi-Fi )

Foot tapper posted:

We can certainly take mains supply options to extremes if we wish.

A single 10mm2 radial supply to a bank of unswitched, wall mounted MK sockets should do for any Naim system in the UK.

Alternatively, a single 10mm2 radial supply to a single MK unswitched wall socket, then use either a Grahams Hydra of a Musicworks 6 way block would do just as well in the UK.  This is what I use.

Anything more is getting a teeny weeny bit obsessive!

Best regards, FT

I suspect that 10mm2 cable irself is an incy wincy bit obsessive unless either a very long cable length or very high power amps are in use...  but then if the distance is short the additional cost will probably be small compared to the installation cost (assuming it's not a diy job).

As for socket, I believe you can get multiway busbar type sockets aimed at industrial use, which will have heavier current ratings, are available in a variety of numbers of outlet sockets, and are designed for heavy cable entry - the weak points electrically on domestic (unswitched) sockets are the socket contacts and the cable  termination, the latter often only having a single relatively small diameter screw bearing directly on the cable conductor, which is difficult to tighten correctly and can make poor contact that deteriorates with time - and the heavier the cable the more challenging this connection can be.

Mike-B posted:

Charnik,  the IEC320 plug(s) on the power cords  & the Naim power receptical male sockets are rated at 10A 

You are right Mike.

To all:

I have some extra questions on the subject.

a) Cable size: 10mm2 refers to each conductor size? Which is the AWG equivalent? 000 AWG?

b ) Residual-current device (electric shock protection unit) should be fitted on dedicated hifi consumer unit?

c) If you can not split electic power at the meter place, is it still worth to split it where it enters the flat at the existing consumer unit?

charnik posted:

Mike-B posted:

Charnik,  the IEC320 plug(s) on the power cords  & the Naim power receptical male sockets are rated at 10A 

You are right Mike.

To all:

I have some extra questions on the subject.

a) Cable size: 10mm2 refers to each conductor size? Which is the AWG equivalent? 000 AWG?

b ) Residual-current device (electric shock protection unit) should be fitted on dedicated hifi consumer unit?

c) If you can not split electic power at the meter place, is it still worth to split it where it enters the flat at the existing consumer unit?

 

A) approx 7 Awg

b) there are certain circumstances where it is not compulsory (in UK), and a few idle hours reading the 17th edition of the IEEE may help, but from both a legal and safety standpoint the only correct answer is to advise that you consult a qualified electrician.

c) the more you bypass anything else the better, at least in theory, though how much difference it makes will depend on what is on your own circuits - and what happens before. Bear in mind that mains is far from pure and stable when it reaches the premises, depending what else the cabling from the electric company's local distribution network server, which in some pkaces can be very differenf from others, making the contribution of your own variously less or more negligible.