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Dedicated line questions...

Did a search, but can’t come up with a good answer. I am considering the install of a dedicated line. The general consensus is a 20amp circuit. How does this rectify with a full system designed around 15amp components/cords. I already have PS audio receptacles, and have upgraded/cleaned up all the other outlets on the current circuit, but it is still noisy. Would installing a 20amp circuit require a refit of gear or just 15-20 amp power cords? I don’t run big mono’s and really only need one line. Would a dedicated 15 suffice?  Yeah, fairly clueless in this realm.
geof3

Showing 3 responses by erik_squires

erik_squires
15,647 posts
 
Thanks @cal3713 , I appreciate the update. The very serious testing done over at Audio Science Review only measured the DC output, not the noise they could put back into the line.

This answers my question about that!

I do recommend keeping wall warts out of your "clean" power zone, whether by using multiple strips, or by using conditioners with separate zones.

https://inatinear.blogspot.com/2019/04/power-management-for-frugal-audiophiles.html

I guess now we know we need to stick to linear supplies otherwise.
erik_squires
15,647 posts
 
@cal3713 I'd be interested to know if you still have the same noise if you use an iFi power supply
erik_squires
15,647 posts
 
Hi there.

Domestic 15/20 amp circuits are a little more flexible than you are thinking. Kind of rare for the NEC.

The idea, I think is that you might want to plug in a couple of 10 Amp devices in at the same time, and that a single 15A circuit wouldn’t work.

As a result, you are allowed to use dual amperage receptacles, which have 1 prong shaped like a T on a 20 A circuit, and connect either 15 or 20 A devices or even far less.

Many devices, like wall warts, will sip off this and may be 0.5A or less. What is important is that the breaker be correct to the house wiring, and that the dual A receptacles be used only on 20 A circuits.

The appliances however may use any gauge of wiring that is acceptable to it’s own fuse/breaker rating. So yes, you can run a 20 A circuit, and put in multiple outlets with T shaped sockets and use 15 A surge protectors on them. If your appliance is rated for 15A you must use a minimum 14 gauge. If 20, 12 gauge.

Best,

E
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