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RE: Ground wire question for PC

For ground wires, a bus bar 1" thick would not be too much.

However, you are using silver, so your question should really be:
what is the minimum size I should use for a ground wire between component chassis?

The answer is this, use something no smaller than the AC cord ground wire of the larger cord used.

If the largest power cord in your system is a 16 Ga. cord, you could "get by" with two 18 Ga. wires in parallel, this would equal a total effective gauge of 15 Ga.

For best results, the largest amount of conductor you can afford, and make it low inductance.
A good way to do a low inductance ground wire is to braid together 2 or more separate wires, this will lower the self-inductance of the wire, to that below a single wire of the same effective total gauge. In order for this to be effective, the wires should be insulated from one another, even though they are carrying the same signal.

For instance, if budget allows, use three 18 Ga. separately insulated wires braided together, this will be equivalent to a total effective Ga. of better than 14 Ga.

Jon Risch


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  • RE: Ground wire question for PC - Jon Risch 20:26:57 05/22/16 (0)

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