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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.

Post Subject: No daisy chain!Posted by N-set on: 11/23/2015

JOHNR wrote:
You should take care that you do not daisy chain the ground leads.
[...]
A system that can work well is to create a single node or terminal where all ground leads are terminated. This terminal is then connected in turn to the electrical panel.

This is exactly what I want to do: all the outlets star grounded to a single terminal within the box (max connection length
would be about 10cm) and then this connected with a single cable to the ground at the panel.
As I understand the last connection is for safety only (planes or satelites have no reference
to the ground and ultraprecise scientific equipment works there no problem). The most important is to have
a compact arrangement of outlets with thick, short, star-connected grounds.

JOHNR wrote:

The choice of wire to be used is important since stranded wire has much higher inductance than a single core. This is important since one can inadvertently create a high frequency TANK circuit.

This is interesting and I did not know that. Do you have any data comparing same cross-section stranded and solid-core impedances vs. freq?
I have to my disposal stranded 16mm2 or solid-core 6mm2 run to the ground. Solid core due to the skin effect has a nice feature of presenting high impedance for AC currents, the thicker the higher the impedance. If i get it right, this is a natural mechanism blocking some of RF rubbish from propagating along thick solid core power lines.

Cheers
N-set

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