|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
136.28.231.246
In Reply to: RE: To answer your question ....................... posted by Tre' on February 26, 2021 at 10:41:29
He might want to put a GFCI (For Safety) on the Circuit that he has plugged the amps into. That was ultimately my solution when I lifted my grounds as well. I put a GFCI on the Circuit Breaker on my Audio Circuit at the Panel.
Edits: 02/26/21Follow Ups:
I have only my preamp grounded, otherwise I get ground loop hum.
It's been that way for over 20 years and I'm not dead yet. :-)
A GFCI is probably a good idea.
Thanks.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
I am glad to see someone as knowledgeable as yourself, is not totally freaked out by this. I have done lots of research on this topic, as well as spending many hours on my system fighting Ground Loops.And, I have All of my Audio Gear with the Ground Lifted. I started with my Tube Amps as I have 115DB Horns. However when I lifted the remaining Grounds I found that the Background is much Blacker and Noise Free with the other Grounds lifted.
And not only is a GFCI is good idea, It is much safer than just a 3 prong Plug. This is per the NEC (National Electrical Code). Addressing homes with older type 2 prong Plugs.
***************************************************************************************
"A grounding-type receptacle that is GFCI protected without an equipment grounding conductor is a safer installation than a grounding-type receptacle with an equipment grounding conductor (if GFCI protection is not provided). This is because the GFCI protection device will clear a ground-fault when the fault-current is 5 milliamperes (+ or - 1 milliampere), which is less than the current level necessary to cause serious electric shock or electrocution"
Edits: 02/26/21
.
Have Fun and Enjoy the Music
"Still Working the Problem"
"And not only is a GFCI is good idea, It is much safer than just a 3 prong Plug."
Mixing 3-prong and 2-prong gear can create a major safety hazard. The chassis need to be securely connected together, and all the gear need to be unplugged while that's being done.
--------------------------
Buy Chinese. Bury freedom.
Just use a GFCI on the Circuit.
A GFCI is not intended to resolve a potentially lethal safety problem that has been incorporated as a routine part of the system. It's purpose is protection against accidents, such as dropping a hair dryer into the bathtub. I would never design a system in such a way that a piece of Chinese-made electronics purchased at Home Depot is the only thing routinely standing between me and death. Tie the chassis together or risk the consequences.
--------------------------
Buy Chinese. Bury freedom.
You Obviously don't understand the purpose of a GFCI. The GFCI does not know or care whether the Ground Fault was caused by an 'Accident' or whether the Ground Fault was designed into the circuit on purpose. It will Trip! Have you ever seen or used a Ground Fault Tester? - Pay attention to the N.E.C. -- Here is what they have to say about 2 Prong Installations:
************************************************************************************************************************
Replacing Receptacles to Meet the NEC
The NEC requires receptacles installed on 15 and 20 ampere branch circuits to be of the grounding-type and it requires the grounding contacts of those receptacles to be effectively grounded to the branch circuit equipment grounding conductor [210-7]. However, the Code allows the installation of any of the following installations when replacing a 2-wire nongrounding-type receptacle where no ground exists in the outlet box [210-7(d)(3)], Figure 9/10:
(a) Replace the 2-wire receptacle with another 2-wire receptacle.
(b) Replace the 2-wire receptacle with a GFCI-type receptacle and marked the receptacle with the words "No Equipment Ground."
(c) Replace the 2-wire receptacle with a grounding-type receptacle where protected by a GFCI protection device (circuit breaker or receptacle). Since the grounding terminals for the receptacles are not grounded, the receptacles must be marked with the words "GFCI Protected" and "No Equipment Ground."
A grounding-type receptacle that is GFCI protected without an equipment grounding conductor is a safer installation than a grounding-type receptacle with an equipment grounding conductor (if GFCI protection is not provided). This is because the GFCI protection device will clear a ground-fault when the fault-current is 5 milliamperes (+ or - 1 milliampere), which is less than the current level necessary to cause serious electric shock or electrocution.
I understand perfectly. Don't make this a personal issue. A GFCI is not an excuse for an installation that would otherwise routinely place the user at risk. And please note the NEC quotation does not apply to grounded outlets.
--------------------------
Buy Chinese. Bury freedom.
Do you know how many houses in the U.S. have ungrounded systems? -- What is allowed by code and what is safe are two different issues."It was in 1984 that a new provision was provided to put 3 prong outlets on un-grounded system if GFCI (Ground Fault Circuit Interrupter) receptacle was used.
And the fact remains, that any circuit with no ground, whether it has a 2 prong ungrounded receptacle or the ground lifted on a grounded 3 prong receptacle, with GFCI protection, is much safer than your Grounded 3 prong receptacle with no GFCI on the Circuit.
Edits: 02/28/21
"What is allowed by code and what is safe are two different issues."
So why did you quote NEC? You're right, code has nothing to do with this discussion.
And as for the rest of it, I never said a GFCI shouldn't be installed. I said that if the system includes a mix of 2-prong and 3-prong gear, the chassis should be connected together, and that a GFCI shouldn't be used as an excuse not to do that. In other words, the system should be wired so that it's safe to use, and then the GFCI should be applied. Tell me again why you have an issue with this.
--------------------------
Buy Chinese. Bury freedom.
I have no problem with what YOU do. You were the one that had a problem with what we were doing. You even mentioned 'death'. I was merely pointing out that my method was safer than yours.
Edits: 02/28/21
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: