Twisted or Straight?


I searched Audiogon for info on inductance and capacitance. From an excellent post by Sean on March 24, he explains that inductance increases with wire spacing ant that capacitance increases as wires move closer together. Therefore, a twisted pair raises capacitance as contact between wires is increased. On the other hand, I'm a bit confused in that I thought winding wire would increase inductance.
Here is my question: For an ac power cable running from the panel box to the outlet, would it be better to run twisted wire or straight (i.e., parallel) wire? Specifically, I'm referring to twisting the hot, neutral and ground vs. having them run parallel? I've read strong preferences for both. Per Subaruguru's post, straight romex increases inductance and allows unwanted high frequencies to roll off. Other posts suggest that twisted is better. Please help me sort this out since I am running dedicated lines to my stereo. Thanks in advance.
ozfly
Without even questioning the scientific reasoning & recommendations of cable designer Mike VansEvers I went with the twisted 10awg THHN solid copper, installed in grounded Greenfield (flexible metal conduit) for shielding. This works so well that I haven't even bothered to try out anything else so I can't actually compare, but can attest to my own very satisfactory results.
Mike told me to tape all 3 conductors together, then clamp one end of the bundle in a vice & the other end in a variable speed drill chuck. I aligned the printing on all 3 conductors in the same direction before twisting them up. It winds up like a big spring & then unwinds somewhat when the drill is powered off, so I then exchanged ends & better re-twisted the remainder. The load end is now terminated with a Wattagate 381 outlet, which from a sonic standpoint completely obliterated the 20A industrial Leviton outlet that was previously in place.
And don't forget the Isolated ground rod (Star configuration of course), ceramic fuse box with glass fuses, I.G recptacles (Hospital grade minimum) Isolation transformer, Isolated generator, Isolated sub panel (with oversized feeders) U.P.S. battery backup, Oversized neutral, oversized ground, isolated ground, dirty ground, dedicated neutral, #6 copper wire (Beldon shielded cable) Industrial grade 3 phase service with bolt on breakers. Twenty seven dedicated 120 volt circuits and three ninty amp 240 volt circuits (just in case)

Did I miss anything? :^)
no - never use glass fuses they sound terrible.
Ceramic is the only way to go, but I have a feeling Glen that you don't subscribe to any of this nonsense. Well neither did I, until I heard it for myself. I'll never go back.
Ozfly, increased inductance on a power cord has its' ups and downs. As inductance is increased, you obtain a natural amount of high frequency roll-off. Kind of like a "low pass filter" that lets the low frequencies "pass through" and attenuates "hash" somewhere above that point. Obviously, the amount of attenuation, cut-off frequency and rate that it slopes off at will vary with the total amount of inductance for the entire run of wire.

While this may be a good thing for power cords due to their limited bandwidth, it is obviously not so good for speaker cables or interconnects. That is why most of the "high end" cable designs are of limited inductance. It should be pointed out that the "roll-off" of an inductive cable can be put to good use if you have an overly bright system. That is walking a tight-rope though, as too much inductance will dull the system out and not enough will still leave you with too much brightness. Better to fix the problem than try to band-aid it. Sometimes though, band-aids are all one can afford at that specific time : )

As to the bad part, wires that are higher in inductance act as a more efficient antenna to RF based signals. It is easier to "induce" stray voltage into them. Obviously, this can be a bad thing if you live in a densely populated area with a lot of transmitters ( cell and cordless phones, AM / FM / TV broadcast stations, CB's, Ham Radio's, etc... ).

The method that Audioengr suggests should theoretically offer benefits over some of the other methods mentioned. However, it would be a lot more work than what Bob suggested and tough to predict whether the results would be worth the extra effort under real world conditions. If one were interested in putting forth that much effort, there are ways to achieve even better results. I don't want to go into details here for specific reasons though : ) Once again though, whether the results would be actually audible or simply more "icing on the cake / increased peace of mind" would be anyone's guess.

If one wanted to get REALLY serious, they could actually measure the total impedance of the run, break down the measurements into specific LCR ( L = inductance, C = capacitance, R = resistance ) characteristics and then create a tuned trap or bandpass filter by adding additonal parts. Something like that would not really suffer from current limitations ( if done properly ) and would benefit everything plugged into that line. Obviously, this would be the optimum way to go but also ( by far ) the most involved.

The bottom line on all of this would simply be a "blacker background" and "increased liquidity" from my experience. Sean
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