Dedicated AC line question

0 Members and 1 Guest are viewing this topic. Read 1722 times.

topround

Dedicated AC line question
« on: 12 Apr 2008, 12:33 pm »
This probably has been covered here before but..
I plan on running a dedicated line to my outlets for my system, can anyone make any recommedations?

What cable should I use ?
Should I upgrade the outlets beyond the Hubble hospital grade?
Should the breaker be installed in any special way, ie AC box tweaks?

Thanks all
Mike

djbnh

Re: Dedicated AC line question
« Reply #1 on: 12 Apr 2008, 01:20 pm »
This probably has been covered here before but..
I plan on running a dedicated line to my outlets for my system, can anyone make any recommedations?

What cable should I use ?
Should I upgrade the outlets beyond the Hubble hospital grade?
Should the breaker be installed in any special way, ie AC box tweaks?

Thanks all
Mike
Came up w/tons of hits using the "Search" function. Here's a thread I started that may answer some of your questions.  This link refers to the post of what I finally had done including installation cost of the lines.

Anywho, I'd consider keeping the digital and analog components apart, and going for 20A lines; there may be other and differing opinions.

Regarding outlets: I separately purchased cryoed P&S 8300 MRI (20A) hospital grade outlets, which worked within my budget constraints. Furthermore, my electrician had no problem allowing me to apply a coating of Walker SST on the bare wire ends going into the duplexes and panel [I note I use SST on electrical / IC / SC connectors throughout my system.].  Others audiophools swear by Porter Ports and different products. On a related note, VH Audio reports it will be discontinuing offering P&S hospital grade duplexes, because "Pass and Seymour has recently made it very difficult to source these receptacles at competitive prices, unless unreasonably large volumes are purchased. Too bad." I echo the "too bad", noting all my dealings with Chris VenHaus have been excellent.

As an aside, get an electrician that understands "phase".  :wink: My electrician from my church made installation on-time, low cost, precise, and painless. [I note my application required that wire be run the length of the house, which increased the amount of wire used/added somewhat to the installation time and cost. However, my basement ceiling at the time was easily accessible, so that mitigated what others might face in labor costs.] For me, the input/outcome = low cost/high return. YMMV. Best of luck with your decision making.

satfrat

  • Restricted
  • Posts: 10855
  • Boston Red Sox!! 2004 / 2007 / 2013
Re: Dedicated AC line question
« Reply #2 on: 13 Apr 2008, 04:21 am »
PM sent,,,,,,

mfsoa

Re: Dedicated AC line question
« Reply #3 on: 13 Apr 2008, 03:52 pm »
Hi Mike,
I've been thinking of making the call to my electrician too. In my case my breaker box is on the far side of the house, and I don't think I have enough open breakers anyway, so multiple dedicated lines are out.

Unless there's some good reason not too, I'm thinking of having a single 220V line run to the audio room for a Richard Gray Substation or something like it. Seems like this would give the cleanest supply of AC, and you can take it with you when you move!

Since want a line run already, maybe it should be a 220V to run an isolation transformer?

-MIke

markC

Re: Dedicated AC line question
« Reply #4 on: 13 Apr 2008, 04:03 pm »
Depending on the brand/age of your breaker box, there are "mini breakers" available. These replace a singal existing breaker and provide 2 breakers in the same size package. I know that these are available for Square D, ITE, Siemens and Cutler Hammer to name a few. Another alternative is to install a "pony panel" or sub panel.

BobRex

Re: Dedicated AC line question
« Reply #5 on: 14 Apr 2008, 01:43 pm »
Check with your local inspector before you install piggyback breakers.  I didn't and I had to tear them all out and install a subpanel when I finished a basement a few years ago.  Just because the manufacturer says you can do it, doesn't mean the locals will approve.

rydenfan

Re: Dedicated AC line question
« Reply #6 on: 14 Apr 2008, 04:00 pm »
My electrician will be installing 2 dedicated 20 amp circuits on Wednesday. My plan is to run my Amp on one and my other gear on the rest. I am excited about it.

My question is, how important is it to use upgraded outlets instead of whatever my electrician will provide? If so what should I use that I could have delivered overnight?

markC

Re: Dedicated AC line question
« Reply #7 on: 14 Apr 2008, 08:43 pm »
If your in a hurry, I'd start with industrial grade outlets, (the orange ones). They have isolated ground and provide a good, solid grip just like hospital grade. If you must upgrade, you can do it later. At least you won't be starting off with the $.79 crap. You can get them @ Home Depot, Lowes, etc. Cost should be about $7 or $8.

rydenfan

Re: Dedicated AC line question
« Reply #8 on: 14 Apr 2008, 08:46 pm »
I went with some 20A Pass & Seymour from Chris at VH Audio.

markC

Re: Dedicated AC line question
« Reply #9 on: 14 Apr 2008, 09:13 pm »
Even better! Let us know how the dedicated lines impact your system.

rydenfan

Re: Dedicated AC line question
« Reply #10 on: 14 Apr 2008, 09:39 pm »
I certainly will! I am quite excited about it.

I also have a ground loop that is driving me pretty insane that I need to find...

JLM

  • Full Member
  • Posts: 10745
  • The elephant normally IS the room
Re: Dedicated AC line question
« Reply #11 on: 15 Apr 2008, 09:06 am »
When we built 3 years ago it included a listening room.  Regarding A/C:

We're located in a small rural sub-division (minimal industry, etc. sharing the substation).

House has dedicated transformer due to the 400 foot underground feed.

All new appliances, built-ins, furnace, etc.

Added a whole house surge protector (highly recommended).

All wiring is 20A/12 gauge, except for future hot tub which of course is heavier.

Ideally A/V circuits should be at the top of the panel (my are not, not sure if that really would help much).

Ran three dedicated circuits to the audio system, each with a single cryo'd hospital grade 20A Hubbell receptacle.

The three receptacles/circuits are grounded together, independent of the rest of the house.

The audio system is very simple.  One receptacle/circuit for each 40 watt monoblock and the third for transport/DAC.

Always work by the building/electrical code, its there for good reasons, and based on hundreds of years of millions of experiences.

Total additional cost: $100 for the receptacles; the rest was done for the flat rate quoted for the overall house.  I'd experienced power abberations (the technically correct term) at audio events, but never wherever I lived (newer ordinary house, newer apartment with independent panel, 50 year old house in small town with "scary" wiring).  So most of what we did can be attributed to a "while we were at it, we might as well" sort of mind set. 

ctviggen

  • Full Member
  • Posts: 5251
Re: Dedicated AC line question
« Reply #12 on: 15 Apr 2008, 11:22 am »
The three receptacles/circuits are grounded together, independent of the rest of the house.

This is not up to code.