Questions tagged [grounding-and-bonding]
For questions dealing with grounding and bonding of electrical installations, and the specific requirements of such.
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Does adding an explicit ground wire to EMT conduits provide any advantages?
I am well aware that NEC allows the EMT conduit to be used as grounding conductor.
In my home, there is no dedicated grounding wire through the EMTs. I know this is fine.
When I recently got HP/HPWH ...
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Existing service panel has grounds on neutral bus and neutrals tied to grounding lug!
Opened this panel which serves a well pump on my property and was surprised to find the grounds bolted to the neutral bus bar, and the neutrals wired together to the grounding lug. I am pretty sure ...
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When should I bond to gas and water piping?
In California, my 200A main service panel is grounded with CEE. Within the same structure this main panel serves a 200A subpanel (including ground conductor) in the garage. The garage subpanel serves ...
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Code question about adding ground to a replacement doorbell transformer installation
Existing doorbell transformer in 1950s era California house is sitting in open on a wood shelf in unfinished garage, supplied by non-metallic fabric-jacketed, plastic insulated 2-conductor cable in ...
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How to ground a metal junction box with a 10/3 and a 12/2 wires going to the same panel
I'm running 10/3 and 12/2 NM wires in the attic. Since my electrical panel is located outside, I have to switch to THHN wires into a junction box. I was wondering what the best way is to ground the ...
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Dead Electrical Leg - Ground or wire-nut and “Abandon”/Tuck?
I have a mess of a “finished” basement in CA (California) that was wired atleast 4x 1922, 1940-50, 1980 and again in 2020, before I came to own the pile of garbage.
I am redoing a lot of the wiring ...
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How do I connect a separately run equipment ground to a grounding electrode conductor? [duplicate]
Jurisdiction
Kentucky, USA; 2017 NEC / NFPA 70
Background
I live in a house built in the 50s that was originally wired with ungrounded outlets. Many parts of the house have been rewired, but a room ...
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Use water pipe bonding conductor as ground for 50A circuit?
I'm planning to run a #2 Aluminum conductor ("XLP/USE-2 or RHH/RHW-2") from my new 200A panel to the water pipe as a bonding conductor (80 ft distance). If I run the bonding wire in a PVC ...
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Bonded neutral on the generator if wiring to a sub-panel?
I wish to install a line from the generator to a sub-panel that has disconnect. The sub-panel feeds the whole house. The line would use a 30amp CB with interlock kit. The sub-panels ground and ...
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Should I connect separate retrofit ground line to existing EGC wiring?
Location: California; house was built in 1950s and originally wired 2-wire, no ground for standard outlets. In late 1960s, some circuits were added, including grounded outlets in the unfinished garage....
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How do I clamp a 4ga armored cable ground to grounding rods?
I'm upgrading 100A service to 200A. The existing 6ga grounding conductors need to be replaced with 4ga. The existing 6ga armored cable was clamped to the grounding rods with these clamps (with the ...
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Do I need to separate my main and gas grounding conductors?
I have a garage with the electrical meter and gas meter on one side, and the water and grounding rods on the other side.
I understand that the meter needs to be bonded to the water pipe and grounding ...
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Is my plan to update ground rods at my service panels reasonable?
My older home is currently grounded with what looks like two lengths of old rebar driven vertically in the ground. I know that the last time the grounding was touched was over 20 years ago, and I ...
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Long Distances- Would additional SPDs help me?
We received had a significant weather event here in Texas where I lost a AC Compressor control board, a landscape power supply (literally blew it apart), and some pool equipment. Not sure where the ...
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Water bonding AND grounding rods
Upgrading to 400 amp service. Have already set my two grounding rods and ran #2 solid for them.
My question is about the water bonding.
Existing water bond was (to my understanding) done wrong...but ...
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Dangers of installing a bonding plug
I have a generator that, I was told, has a floating neutral, so I purchased a ground neutral bonding plug because it is required in order to use the Soft Start plug.
The generators motor started ...
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Neutral and Ground Bond for new Automatic Transfer Switch and Main disconnect Switch
I am working on a design where there is an existing transformer, generator, manual transfer switch and main panel. Where should I bond the neutral and ground for the new ATS and Main disconnect switch?...
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Question about grounding a new 40' self-supporting aluminum TV antenna tower
I've thoroughly researched the grounding requirements of such towers and equipment, but there are still some details I'm not quite sure on. Tower requirement for grounding electrode as per NEC, one ...
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Bonding wire on copper pipe
The previous owner of my house (built in 1999) started replacing the copper water lines with PEX. There’s a bonding wire connected to a section of copper pipe that runs from my kitchen sink, but that ...
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What are the grounding/bonding requirements for outdoor-mounted power over Ethernet (PoE) security cameras?
I am planning a construction project; as part of it, I will install several security cameras mounted to the underside of my soffits. The cameras will be connected and powered via a wired network (...
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Adding ground wire to sub panel
I have a service drop 50’ from my cabin. 2 runs of 1/0 aluminum underground wire (3 wire system) were run underground in 2” PVC conduit pulled in to a junction box and then one run was wired into the ...
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Am I supposed to ground the breaker box itself?
In a tool shed on my property, I've removed an old fusebox, and installed a breaker box to provide power to a couple lights and outlets.
Obviously I don't want anyone to get shocked, and am a little ...
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Why separately ground the device case? [closed]
Why separately ground the device case?
I had some work to do to install network devices in a rack. And in the course of work, I had a question. I had a Cisco switch in my hands, on the front panel of ...
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Do the EGC and GEC both terminate at grounding bar in new sub-panel in detached building (garage)?
Edit: My rough location: Grand Rapids, Michigan, USA
There are a million questions and youtube videos on the topic, and I'm sure one of them clearly answers this question because it seems so ...
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What's the proper way to extend wiring into a replacement panelboard?
I'm planning a replacement of a 1960s-vintage subpanel in my home's garage/garage apartment. Power feed from the service entrance is through EMT, which I'll have to use as the grounding means as it's ...
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Crimping wires with ring connectors in residential electric in the US
I'm wiring a whole house and I have a bunch of metal boxes that have 4 ground wires connected together with a wago:
2 grounds for the line (line in/out)
The pig tail to the device
The connection to ...
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Why is it required in some countries to sleeve uninsulated earth wire in junction boxes, but not required and not practiced in other countries?
I don't know if the better question should be "why does, for example UK, require earth wires to be covered in a yellow sleeve in junction boxes", or should it be, "why does, for example ...
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Mounting lug to junction box
I need to bond 10 ga stranded EGC to a metal junction box. I’d like to use something like this lug. The box will be screwed to a floor joist in the crawl space under my house.
Does this lug need to be ...
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electrical feed to fish cleaning station
I have a fish cleaning station with a light and a GFCI receptacle. The GFCI feeds the outdoor floodlight that keeps tugboats from running into the pier. Should the circuit be fed by a GFCI breaker. ...
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Main panel grounding modification (two grounds in box to single ground wire)
My old house’s main panel has two ground wires, one leading to pipes, another to a grounding rod. Because the bottom is the only easily-accessible side for new circuits, and because most of the ...
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Upgrading 240v 3 prong dryer outlet to 4 prong
I was going to replace an old 3 prong dryer receptacle with a new one. It being an old townhouse built in the late 60's I assumed there wouldn't be a ground wire, but when I took the outlet out I ...
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How is a Ufer ground attached to the panel?
I am planning a addition to my house. I'm not sure of the current state of the house's grounding system (built in the 1890s, last updated in the early 1970's by my estimation, so "minimal" ...
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Code re water pipe as grounding electrode
My 200A main panel ground currently goes to the metal water pipe right where it comes into the building. Presumably the pipe was allowed as the only grounding electrode when the system was installed ...
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ITE EQ Load Center neutral / ground update
Here’s an update on the main panel neutral issues that I raised originally in another question. I relabeled the photo, and made a diagram to show the problem. This post restates the issue, I hope more ...
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Utility requires EGC wire to be bonded in meter can, do grounds and neutrals have to be separated in main panel?
My utility requires a bare #6 wire to run from the the rods to the meter pan and be bonded with neutral. The wire then runs to the ground bar in the panel.
I have an old panel with only one bar for ...
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ITE EQ Load Center neutral / ground questions #2
In the photo below of the top of my main panel, wire A is clearly not in a good spot. Perspective in the photo is distorted, it's actually about 1-1/2" from the mains, but still ... Anyway, at ...
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Generac GP8000e/Need to be grounded? Remove Neutral?
I have a Generac GP8000e generator that I plan on back feeding the main panel of my home with the portable generator, power inlet box L14-30a and breaker. First, I will install an interlock between ...
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Changing out GFCI disconnect for new hot tub
I purchased a new hot tub. On the current disconnect, using an ohmmeter, I get 0 ohms between the bare conductor and white neutral. I wired the original box and had it inspected but not sure how in-...
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What types of conduit would be appropriate to extend a circuit inside a storage bench?
The existing condition has a built-in banquette (bench) with hinged seats so that the interior space is accessible for storage.
There is a wall-mounted receptacle inside the bench. Because of the ...
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How to ground two circuits in same box without violating neutral bonding
Confused on what to do in this situation, or if there is a problem... here's the setup:
I have a main panel and a subpanel. Main has ground bonded to neutral and sub panel has bonding screw removed to ...
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Is my non-standard outlet box grounding screw code-compliant? (US in 2022)
I'm installing GFCI outlets in my 1950s era existing kitchen counter wall boxes. The metal boxes in the wall have a number of holes in them that I thought were for standard green grounding screws, but ...
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How do I check if my outlet's ground and neutral are connected correctly?
When we moved to a new house I noticed a strangely wired up outlet:
For this outlet, I am really suspicious whether the grounding is messed up and mixed up with the Neutral.
Normally Neutral and the ...
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Does this "creative" grounding meet 2017 or 2020 NEC?
House configuration:
1950s California ranch style single story with attic. Late 1960s split bus panel with probably 100A service. 120V outlets in house are ungrounded 2-prong. Gas enters house ...
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Bonding gas line to electrical Ground
When bonding a gas line to a electrical ground, can the bond to the gas line be anywhere post meter or does it have to be close to the meter?
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Should a subpanel in the same building have its own grounding rod?
I'm installing a subpanel on the opposite side of my home. To be clear the subpanel will be attached to the same structure as the main panel (the main panel does have a grounding rod), just on the ...
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Bonded neutral generator - connecting to house and removing bond in main panel instead of within generator
When connecting a generator to a house, since it's a bonded neutral generator, I was told that I need to first remove the bond within the generator since there's already a house bond.
I was going to ...
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Should a subpanel be bonded if it's not grounded to main panel?
I have a subpanel that was installed probably back in the 80s. It has a ground wire running to a local ground rod, not back to the main panel. The ground bar in the panel is not bonded to the common (...
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Connecting a "Bonded Neutral" in an A/C disconnect
Followup to my earlier question about replacing a sub-panel and adding an A/C disconnect: I'm just taking a good look at the disconnect and I see that it has the two line voltage legs, OK, and another ...
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What is the best way for pulling 3- 4/0 wires and bare ground through 2” conduit [closed]
Pulling 200 amp service from meter to panel
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Do I need to bond and ground where the CSST connects to the metal pipe?
I recently had my gas line moved for my range. The piping was replaced with CSST.
If my metal piping is already bonded and grounded near the gas meter, do I need to also have a separate bond and ...
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