15A vs. 20A power cord questions
I rather not upgrade the power cables at this time. I would like to see the effect the dedicated lines and outlets have first. Are there any issues with running 15A power cords into a 20A outlet and line? Would a 20A power cord possibly sound better or is it just a matter of the blade orientation?
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"As for the use of an isolated earth ground rod, that’s a no, no. The purpose of the safety equipment ground is to provide a low resistive path for ground fault current to return to the source. Mother earth is not a low resistive path. If the earth is used as a path for ground fault current, and there is a ground fault event, the area around the earth driven ground rod works great for hunting fish worms. The earth does not possess some magical mystical power that sucks nasties from an audio system". THIS! It's REAL important! ALL grounds must return to the ground buss in the service panel. |
Send him a copy of this. Quote from Link below: >> "Grounding Myths >>>>>
About how long will the branch circuit run be? Don’t forget to figure up, down, and around, when figuring the total length of the run. (2 conductor with ground only! Hot, Neutral, and ground) The wiring and wiring method used depends on the state and or local electrical code of Pittsburgh, PA. The electrician you hire will know what is code for your town. He will determine what will work for your wiring installation job. IF NM-B sheathed cable, (Romex is a trade name of), can be used for the electrical wiring installation that works great for audio dedicated branch circuits. IF because of code or because other reasons it has to be in conduit ask the electrician if MC aluminum armor cable meets code for your town. (2 wire with ground only! Hot, Neutral, and insulated green wire.) If that meets code make sure he buys solid wire conductors and not stranded wire. Don’t let him talk you out of it. Especially if you want to use #10awg wire. Trust me he will try to get you to use strand wire. If he says nobody has 10-2 with ground solid wire MC AL armor cable tell him to try an electrical wholesale house in town. They will have it. Worse wiring method for audio branch circuits is for the dedicated branch circuit wires pulled in an empty conduit where they are loose and randomly laying inside the conduit. This method can lead to induced voltage noise on the equipment grounding conductor. A true dedicated branch circuit does not share a conduit or cable with any other branch circuits. Example: 10-2 with ground NM-B sheathed cable. Example: MC AL armor cable |
asp307 said: Lines? More than one. Not knowing what the wiring layout method will be for the NM-B cable installation, if possible after the electrician gets out of the electrical panel and starts the horizontal parallel runs of the cables ask him if possible to keep them separated from one another by at least 12". If they are installed right next to one another for several feet when a connected load is connected to the cables the current carrying hot and neutral conductors magnetic fields will induced AC voltage/noise onto one another. (Same reason why dedicated branch circuits should never be installed in a conduit or raceway with other branch circuit wiring.) Have him keep the dedicated branch circuit NM-B cables away from any other branch circuits that may have light dimmers connected to them. The load side wiring as well as the line side feeding the dimmer, (when turned on light/s dimmed), emits Harmonics RFI as far as 3’ to 5’ in all directions from the wiring. (The wiring becomes an antenna). If your new dedicated circuits are closer than 3’ the wires will pick up the RFI from the dimmer emitting wiring. When he connects the branch circuits to the branch circuit breakers in the electrical panel make sure they are all fed from the same Line,leg. All from Line 1 or all from Line 2. Not from both. Have him verify they are all connected to the same by using his volt meter and measure for voltage from the Hot contact of one duplex receptacle dedicated branch circuit to the Hot contact of all other dedicated circuits duplex receptacles. If they are all fed from the same Line, leg, he will measure zero volts. If he measures 240Vac nominal between any of then they are fed from both Lines. For audio equipment connected together by wire ICs you want all the equipment fed from the same Line, leg. |
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