Using 15 amp power conditioner and power cords with 20 amp wired outlet.


I’m thinking of having my electrician run a 20 amp dedicated line in place of the existing household line that is in the living room of my 1959 built house and most likely is ungrounded and part of a string of multiple outlets on the same circuit. 

I know this has probably been covered many times before and, yes I may check the archives for solutions but thought I would inquire here anyway. 

Since I’m going to he trouble of running a dedicated line, I figure I might as well get it to 20 amp specs. In the future I may order a new solid state amp in the 20 amp version for better bass and dynamics. 

For now though, I would continue to use my existing 15 amp power conditioner (Bryston BIT-15) and power cords. As far as I know the power conditioner would protect my components and nothing would malfunction as far as I can tell. Please feel free to educate me here. 

My future 20 amp upgrades would be a new Bryston cubed series amp with a 20 amp option and possibly moving up to the Bryston BIT-20 power conditioner for better bass, quietness and dynamics potentially with my low impedence Thiel CS-3.6 speakers. 

Thanks for any help.
masi61
Yes you can run a 15 amp power conditioner on a 20 amp circuit. You're not suppose to run 20 amp on 15 amp circuits. I'm not sure what you're talking about with future 20 amp options on an amp. Do you mean 240 volt instead of 120 volt? 
If you install a 20-amp breaker, run a #12 or #10 branch circuit and install a Nema 5-20R receptacle, that will cover all 120 volt options for 15 or 20 amps.

My advice: use romex 10/3. Cut the bare ground and use the insulated red for ground connected to the receptacle ground screw. Be sure to put green tape on the red wire where it is visible. This feeder works the best IMO since all the wires are twisted at the factory. The twist helps cancel common mode noise. The worst wire to use is 2-wire romex because the hot and neutral are parallel to each other, which makes it a very efficient RF antenna.

gs5556
874 posts

My advice: use romex 10/3. Cut the bare ground and use the insulated red for ground connected to the receptacle ground screw. Be sure to put green tape on the red wire where it is visible. This feeder works the best IMO since all the wires are twisted at the factory.

So don't use the bare ground at all. Use the insulated red one but mark it with green.  I understand all that.

I don't understand "all the wires are twisted at the factory" romex?
Did I miss something.. Isn't Romex flat? If it's flat, and not twisted, why abandon the wire intended for the original ground, why not use both one for ground, and one attached only at one end as a shield. Would that work, and still be code?

Regards