Not B.S. They explain it if you’d just read the instructions. Worlds Best Cables simply say this: These Quad RCA cables are configured as directional cables, we strongly believe that this is the most appropriate topology for best performance and superior noise rejection characteristics. Most cable assemblers will either leave the shield floating at both ends or grounded at both ends which makes it easier to assemble but inferior in performance. We do not take such shortcuts.
What does "Directional" mean: This simply refers to the construction, which is depicted in their included diagram, which shows the shield, which is connected to the ground at the signal emitting end acts as a Faraday cage which rejects external noise that could degrade the signal. The cable will work even if you connect it the wrong way, but this will diminish the noise rejection capabilities of the cable.
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I work with several electrical engineers and they concur with the above. Does it make any "real world" difference? That will depend on the electrical environment of your equipment and how "noisy" it is. But it doesn’t hurt to be erring on the side of reducing possible interference. I mean, short of using balanced cables for every single interconnect (something not possible on most devices), using cables that are "directional" seems to be the next best thing.
Directional wires/cables
Is there any reason to support the idea that cables, interconnects or any other kind of wiring can be considered directional? It seems that the theory is that carrying current will alter the molecular structure of the wire. I can't find anything that supports this other than in the case of extreme temperature variation. Cryo seems to be a common treatment for wire nowadays. Extreme heat would do something as well, just nothing favorable. No idea if cryo treatment works but who knows. Back to the question, can using the wires in one direction or another actually affect it's performance? Thanks for any thoughts. I do abide by the arrows when I have them. I "mostly" follow directions but I have pondered over this one every time I hook up a pair.
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Did you do your practical hospital wiring based on the "false" teachings from your apprenticeship, or based on what you learned here? Be honest. Maybe you were the sparkie that "forgot" to connect The Canberra Hospital's UPS to the mains supply? Perhaps you could restate your understanding of electrical energy, as set out below, so it makes sense? You might care to include the effects of resistance and voltage ... and the relationship between power and energy:
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You seem to accept that
I'd add "in a vacuum" just for completeness. You would, I hope, agree that low frequency electromagnetic waves are radio waves and travel at the speed of light. So would you dispute that the wavelength of 60-Hz radio waves in a vacuum is 186,000 / 60 or about 3,100 miles? That's about the radius of our planet. Do you really think the conductors in a circuit board radiate any detectable amount of 60-Hz radio waves? You might care to read up on the difficulty of communicating with submerged submarines using extremely low frequency radio - see Communication with submarines - Wikipedia |
@richardbrand Said:
I did electrical wiring after 2010 the same way as I did before 2010. Why would you think I would do it any different? Knowing how energy actually flows from the source >>> to the Load doesn’t change anything as for installing electrical wiring. To keep it as simple as I can for you... Example: A customer has a new piece of equipment he wants connected to electrical power. He may have a spec sheet that specifies what the manufacturer requires for the minimum electrical wiring requirements. Usually it just says it must be wired to meet NEC code. (Not Always) If nothing is given the name/data plate on the equipment is used. The data plate will show the Phase, voltage, and the FLA (Full Load Amps). Per NEC, (National Electrical Code), the branch circuit wiring is sized using the FLA times 125%. If the FLA is 27A, 1.25 X 27A = 33.75A. Table 310-16, (and notes), wire size? #8awg copper. That’s It.... Phase, Voltage, and Full load current. (Note: Motor loads use different wire sizing calculations) Nothing said about current "flowing" back an forth in a circuit. Nothing said about energy flowing in one direction either... Phase, Voltage, and Full load current... (Note, there are, will be, maybe, other things the electrician must take into account, for the wiring method he uses. I kept it simple, for you.
As for this"
LOL, that was a quote... I really don’t think the author needed to say, in a vacuum... Most people know outer space is a vacuum. .
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@jea48 Thank you for your honesty, You do your wiring the same before and after you ’learnt’ how electricity really works on this forum.
No, but as a physicist I just had to add that nuance before I got accused of getting it wrong! Light slows down in water, glass or plastic by a ratio corresponding to the refractive index of the medium. In fibre-optic cables, light normally arrives faster if it travels straight down the middle, than it does when bouncing at an angle off the inner surface. This is simply because it has further to travel. So at the end of the transmission, the light is smeared out in time depending on the path it took, which is not good for digital signals Clever manufacturers use glass with a higher refractive index at the centre, getting lower towards the edges. This is done by changing the composition of glass vapour during vacuum deposition when building up a glass slug. The slug is subsequently drawn into a very fine fibre. The higher refractive index at the centre is designed to slow straight-through photons so the signal arrives all at once, more or less. Obviously this is more important for undersea cables than for component connections, but hey .... if marketed properly some will buy in. Did you know that space has negative energy? Create more space, and you create more vacuum into which things can "fall". Or that quantum space is not really empty - particles and anti-particles appear and annihilate randomly. That is a credible way to create a universe from almost nothing
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