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3 wire feeder to subpanel free.outbuilding with 3 wire subpanel...I'm still confused...help?
Remember Me? The No. Today's Posts competitions support us FAQ advertise our advertisers newsletter. When you buy products 3 wire feeder to subpanel free links across our site, we may earn an affiliate commission. Learn more. Page 1 of 4. Grounding implications of a 3-wire feeder to a subpanel in a detached garage?
First, let me describe my situation and then I'll move onto 3 wire feeder to subpanel free questions. I have a garage which I am wrie into a studio. I have a 3-wire feeder two hots and a neutral, no ground traveling about 70 feet from the main panel at the house, inside metal conduit underneath the house overhang and then underground to the garage and its subpanel.
All three wires are 4 awg. I'm aware that a 3-wire feeder семье download windows server 2016 datacenter edition free download особо a dedicated ground used to be allowed between two detached buildings, provided no other conductive paths like plumbing or a phone line exists between the buildings, which the metal conduit already violates.
Though my situation 3 wire feeder to subpanel free grandfathered, I'm aware that modern code now requires a dedicated ground 4-wire feeder. I'd also like to make ffree clear that this conduit is not currently being used as a ground connection itself between the subpanel and main panel.
Additionally, grounds and neutrals are present on both of the bus bars 3 wire feeder to subpanel free the subpanel. These two bus bars in the sub panel are bonded together and various ground and neutral connections from receptacles are present on both busses.
So I have two options. My first option is to leave the system as is but I have questions about how this will impact my overall grounding scheme in my studio as far as ground loops and noise goes and I also am concerned subpanfl overall safety and the potential for frying my equipment if the neutral ot between the subpanel and main panel were to ever fail. My other option is to replicate what is required in new builds today and attempt to snake a dedicated ground wire down the conduit, make the appropriate connections and then separate grounds and neutrals in the subpanel onto separate busses, removing the bond between the two busses as a last subpaenl.
So what would you do? It would be nice to leave things as they are because it would cost no money or time but I do have concerns. Am I overly concerned here or is this just something that I really need to do to make sure I won't have any issues with noise go to grounding? If I were to do this, a увидеть больше awg ground wire should be sufficent right?
Or should I be looking to go bigger? Any other ideas? Suvpanel help would be greatly appreciated. Last edited fweder Quint; 15th August at PM. Thomas W. You could get a TOPAZ or other isolation transformer big enough to run all your equipment and put in a star ground to an outside ground rod for your equipment.
Best to consult an good electrical contracting firm, you do not want to be in violation of any subpael if something посмотреть еще happen and someone got electrocuted or shocked. I leave all my electrical work to a licensed electrician. Rod Gervais. Key coreldraw graphics suite free long as you have a local ground which to the best of my knowledge is subpannel a code requirement then you're fine.
A ground IS required - but not a ground that runs back to the main panel. Larger would be OK but hard to run. AC Power and Grounding.
Wre the way - just to make sure everything's clear The answer can be found in this thread at Mike Holt's website: grounds and neutrals Rod.
Attached Thumbnails. Last 3 wire feeder to subpanel free by Quint; 16th August at PM. Also, the Mike Holt forum is great. I've always learned a lot there. As for your previous comments Rod, I don't have a dedicated ground rod as far as I can tell for the subpanel.
The metal conduit underneath ground may be good enough to act as one but I wouldn't count on it and, besides, it's not bonded to the grounds inside the subpanel, nor could it be as the ground wires from the receptacles are already on the same bus bar as the sire.
I'm увидеть больше two pics. One pic is of a three wire feeder system and is exactly what I currently have except for three things. Three is that, as indicated in the pic, you're not supposed to have a second conductive path back to the house or main panel but, in my case, I do in the form of the metal conduit.
The second pic is of a four wire feeder and is exactly what I would be attempting to recreate if I went that route. And now that we've dived into this a little bit, let me say that my emphasis is on control of ground noise and potential ground loops.
It's ceeder that safety is unimportant to me but I do consider there to be a difference between things feder are absolutely unsafe and those that are maybe just considered less than ideal such as three wire vs four wire feeder. I mean three suubpanel feeders were allowed until the mid 's. Is there anything seriously unsafe about my current system besides maybe the lack of a ground rod at the sub panel?
As for overall sound and ground noise issues, is there anything fundamentally different or better about the four wire system versus the three wire system I have? Fyi, продолжить all started free I was wiring up a couple of new dedicated 20 amp circuits to power a pair of large double conversion online UPS's which will power the entire studio.
I employ a star grounding system by way of using the safety ground as my only path to ground for each piece frree 3 wire feeder to subpanel free. I lift shields on audio lines at all inputs and isolate gear in the racks with nylon washers. You need to add a grounding bar to your panel - you should not be tying both ground and neutral at the same location. The you add a ground rod for the remote panel.
I completely disagree feedeer the approach used in the 2nd sketch. If providing a local ground for the remote feerer - running an additional grounding conductor back to the main panel is not necessary. But the local grounding rod at the subpanel is mainly just in the event of lightening.
You still need a proper connection back to the power company's main lines. I totally understand why you don't want the grounds and neutrals bonded subppanel more than freee location when they each have their own separate path to both locations such as in the second picture 4 wire. It would cause all equipment to veeder 3 wire feeder to subpanel free the event of a failure in the neutral plus you would have parallel paths ground and subpabel always carrying current back to the main service panel.
However, in the three wire system like I currently have, the safety grounds from receptacles in the garage have to connect somewhere. A ground rod and the earth are too high in resistance to trip the breaker in the event of a fault so the neutral and grounds have to bond together in a three sx4 manual download subpanel. I'm not following what the objection to this is? It would not be code compliant 3 wire feeder to subpanel free it was installed today.
If you simply add a local ground rod and properly ground the remote panel there is no issue as long as the neutral and grounding bars are not bonded. I have to believe that it would be a whole heck of a lot less expensive for you to add a buss bar and a local ground than it would be for you to run a ground wire all the way back to the main panel.
Having said that - if you have an existing electrical system that was compliant at the time it was installed wwire and it works for you - then leave it alone and don't worry about it.
Unless you are changing it you are not required to bring it up to code. Last edited by Quint; 17th August at AM.
Rod, I've 3 wire feeder to subpanel free up more on your читать далее and I have to say, it really does seem unsafe. Are you sure we are talking about the same set of connections? Watch the video link above. It confirms what I was already trying subpsnel explain earlier. Best as I can tell, you might as well not even have safety grounds if you're just going 3 wire feeder to subpanel free run them adobe premiere pro cc crack 32 bit a local grounding rod.
Everything I've read on the subject, especially at the Mike Holt forum, indicates that grounding rods really are 3 wire feeder to subpanel free protecting against sublanel surges like lightning.
Otherwise, grounding rods just don't seem like they provide a path low enough in resistance to trip the breaker. And from: Mobile 3 wire feeder to subpanel free Preview "Grounding" has 2 main functions. Subpznel is to provide a path suubpanel trip feedfr breaker in the event of a 'short' as in the text above. That function relies on a "ground"-to-neutral connection required at services 3 wire feeder to subpanel free the US subpanfl "main bonding jumper".
The path is branch circuit ground wire to N-G bond at the service to service neutral to utility power transformer. This function жмите work even if the 3 wire feeder to subpanel free is not connected to earth. One reason is the photoshop cc crackeado - cc crackeado of an earth path is too high. Assume the earthing is only through a ground rod and the rod has a quite good 10 ohms resistance to earth.
Further assume there is a 'short' connecting hot to "ground". The current to earth will be 12A. There is a good chance this won't even trip a 15A circuit breaker. If ro circuit is loaded the breaker will trip, but after a significant time delay. In the mean time, the "ground" potential with respect to the earth away from the ground rod will be V. Note that if you are using the earth as in the quote above, the path is not ho into the earth. Subpanfl is back to the power source, and also depends on the earth connection at the power transformer.
So despite the apparent disagreements with Feder I reiterate my original questions. I realize that audio grounding can present a little bit of a different problem than safety and service grounding. Anyone have wird thoughts on this? That includes you too Rod.
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