AC Dedicated Line
That way, when big crescendos emerge, you know full current is still available to the rest of the system.Not so. Full current is supplied by the PSU caps. The wall only supplies current when the cap voltage is lower than the line voltage plus 1 diode drop. See Rod Elliot's http://sound.whsites.net/power-supplies.htm and http://sound.whsites.net/power-supplies.htm#s51 in particular. In the case of any peak that is out of sync with the line voltage the line supplies ZERO current. In case of any frequency below the line frequency, the line only supplies current for a portion of the cycle. In the case of frequencies above the line frequency, the line only supplies current for some of the frequency. The increase in headroom for over size wiring amounts to about 0.25db. See https://forum.audiogon.com/discussions/headroom-loss-for-1600w-on-14ga-120v |
plga I just measured last week my system and the subs consumption and, even at loud volume, more than what I hear normally, my system didnt consumed more than 1 amp and neither did the subs.rbstehno I don’t agree that running 1 - 20amp circuit is all you need. Without knowing all the equipment you have today or you will get in the future, why only put in 1 circuit when running wire for 2 or more circuits isn’t that much more? Here we see the difference between people who actually know what they’re talking about and flat out unsubstantiated opinion. Just like I said, now confirmed (and the best kind of confirmation, objectively measured, twice) audio circuits do indeed draw a whole lot less power than people think. Even I would never have said so little but there you go. Measured. Twice. Well again max power draw occurs most often when devices are first turned on and the empty caps are charging. After that its pretty minimal, even at full volume. plga again The main power of my home is triphasic and, from the main board, all the monophasic circuits are connected to somehow balance each phase with similar current. Thanks for that. We have three phase here in the US as well but here its mostly used commercially and residentially only when people request and pay for it. I know one guy with a killer wood shop running three phase. That’s it. Anyway, it doesn’t matter. Not for what you’re doing. The advantage of three phase is its cheaper because it allows transmission of twice the electricity with the same amount of conductor material. Once it gets to your house panel though then you work with it just the same as our two phase AC. The panels in all our homes have two rows of breakers, one for each phase. Yours has three. Looks different but really the same. Because in both cases each circuit runs from one of the hot phases to neutral. So you can do everything just like I said. Only little wrinkle would be you want to pull your hot from whichever one of the three has the least draw already on it. In other words try and keep it balanced. Same as you would here. Probably should mention, I got a PM about this, the biggest best value of all this is if before installing you have all your wire cryo’d. Anyone with liquid nitrogen and a chest freezer can do this for you. Don’t pay a lot and don’t pay shipping. Find someone local or don’t bother. For sure don’t waste your money on anyone touting special audiophile treatment. They are full of it. But do cryo if you can. Huge improvement. |
Wouldn’t it be riskier to use a larger breaker on a circuit than necessary? If you only draw 5 amps a 30 amp circuit may never trip. That was my understanding. Electricians, here, is that right? @jbhiller I’m an EE rather than an electrician, but keep in mind that the purpose of a breaker is to prevent the AC wiring from overheating, if more current is drawn through it than it is rated to handle. Its purpose is not to protect audio components or other devices that may be powered via that wiring. So if the AC wiring and the outlets are rated to handle 30 amps or more, a 30 amp breaker is suitable. @ieales Ian, thanks for providing a quantitative perspective on these matters, especially in the analysis you provided in the thread you linked to. My perception over the years, generally speaking, is that in the absence of a quantitative perspective it becomes very easy to attribute a perceived sonic effect to the wrong variable. As you said in that thread: ... many of the wiring ’improvements’ noted result from having a new clean home run with no quick-connects, aged connections and sockets. Heavier wire is used and any improvements are falsely ascribed to the wire gauge rather than the drastic reduction in line resistance. Best regards, -- Al |
