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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: RE: Faraday's Law and Ohm's Law. posted by Pooge on June 24, 2007 at 03:17:06:
So how does Steve correct his ground loop problem?
Things we know so far.
#10-2 W/grd NM-B, (romex trade name), was installed for each of the three branch circuit wiring. Hard to believe there would be any resistance if measured at each recept between the neutral and equipment grounding conductor. Max allowed by NEC is one ohm.
All three circuits are fed from the same electrical panel and all three equipment grounding conductors are terminated in the same panel. How was the terminating of the three neutral conductors and equipment grounding conductors accomplished? we do not know. Are the neutral conductors and equipment grounding conductors terminated on the same Bar.In other words was the neutral bonded to ground in his electrical panel the branch circuits are fed from. This would have the neutral conductors and equipment grounding conductors terminated, sharing, the same neutral/grd bar.
Steve did not have a hum from his system before he connected his equipment to the three new dedicated circuits.
We know he uses a power conditioner.
We know that if he disconnects the ics from the preamp to the power amp/s the hum is not present. At this point we do not know if Steve tried the preamp and power amp/s tied together by the ics without any inputs of the preamp connected to any other equipment by ics. Ics removed.
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What we do not know,
Are all three circuits connected to the same Line in the electrical panel.
What is the total length of each branch circuit.
Is the AC polarity of each recept correct. Hot and Neutral conductors not reversed at a recept.
What would happen if the power conditioner was taken out of the equation. Could it now be causing the problem.
Could a bad ic grd shield connection cause the problem. Corrosion maybe at the RCA jack or possibly the ic connector. Possibly poor contact or contact pressure.
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What can be added to the list?
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Follow Ups
- Ground loop problem............. - jea48 07:49:45 06/24/07 (0)
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