New listening room electrical design
The wiring method depends on the construction of the house. Without knowing the construction of the house there is no easy answer to your question. The electrician you hire will look over the construction of the house and will determine the options of the wiring methods he will have. He then should explain the options to you. Things to consider: Wood stick framing? Other? Basement? Unfinished or finished ceiling in area below the audio room? Foundation crawl space? House/audio room built on a concrete slab? Above ceiling attic accessible crawl space? Other? //
Well if you are going to spend the money to have a sub panel installed the bare minimum size in my opinion would 70 amp. Wire size #4 copper. Or bump up to #3 which is good for 85 amps. What is the aprox total length of the feeder? Include up down and all around in the calculation. Does the garage have an accessible attic crawl space to install the feeder? If so you might want to consider NM-B sheathed cable or MC instead of conduit with loose random conductors pulled inside. Depends on the total run, length, of the conduit and installed feeder conductors. http://centralindianaaes.files.wordpress.com/2012/09/indy-aes-2012-seminar-w-notes-v1-0.pdf //
Twisting the wires? As in wires, conductors, that are pulled in an empty conduit? Not sure that meets NEC (National Electrical Code). Note: Dedicated branch circuits should never share the same conduit or raceway with other branch circuits. That includes multi conductor cables. For the branch circuit wiring from the sub panel to the wall receptacle outlet boxes I would use NM-B cable, Romex. (If local code permits. And or the wiring method that must be used will meet local code for NM-B cable.) If the wiring must be in conduit ask the electrician if aluminum armor MC cable, 2 wire with ground, meets local code. Note: MC, not AC cable. (MC comes in both solid core and strand copper conductors. Specify solid core only. Beings you will be using #10 wire the electrician will try to talk you into using stranded. He will tell you they are both rated for 30 amps. Stand your ground, Solid core only. Example of 10-2 with ground MC cable with aluminum armor. http://www.lowes.com/pd/250-ft-10-2-Solid-Aluminum-MC-Cable/3637694
|
Thanks for the info. Just going from memory I believe Synergistic Research has Leviton build their receptacles. Adding the TR face plate is easy to do, for a price, and thereby makes the duplex receptacle code compliant for use in a residential dwelling. Just a guess others will follow. They are probably trying to sell off their existing inventory first. That still doesn't make it right, code compliant, though. |
Jea48, Thanks again. The room and garage are in the above the grade basement, an concrete slab no crawl space under the slab Subpanel will be about 10-12 Ft. away from the main panel, and can be located on the wall, separating garage from the audio room. The 3 walls of the audio room are sheetrock on studs over concrete The other side wall is internal, non-bearing, sheetrock on studs, that is likely will need to be reinforced. The ceiling is finished, with the living room, kitchen above it. I would imagine, there is some space for the wiring. MC vs. MC armored cable duly noted |
jea48: The new Synergistic Research Black outlets are stamped TR and one can see that TR mechanism in the outlet orifice. The ST Tesla Plex outlets are in fact made by Levitron + modified by Synergistic Research. The SR Black outlet has many sonic properties that I think make it worth auditioning in one's system. They are expensive and to me worth it. They are one of the few audio grade outlets sold with a 30 day return policy. David Pritchard |
