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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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using load center ground bars for neutrals

I'm replacing my main load center, with this unit: Note that the neutral bars extend only about halfway down the columns of breakers. This seems a bit inconvenient, especially for a retrofit where ...
RustyShackleford's user avatar
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1 answer
46 views

Requirements for how electrical ground bonding jumper enters structure and reaches subpanel?

Burbank, CA I added a 125 A subpanel to my detached garage (2/0 feeders), and ran copper ground between it and the main panel. I’m now installing a pair of grounding electrodes for the subpanel, and ...
Rick's user avatar
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2 votes
1 answer
101 views

Connection of Protective Earth for EV charging

I am reading about the EV charging at J1772, where a connector image is displayed. The connector has a PE terminal. I read that the Protective Earth is connected to a earth rod on the charging station ...
Novice's user avatar
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0 answers
79 views

Neutral ground bonding in main service panel

I purchased a property with a 200 amp outdoor main service panel below the power company's meter. I want to use this to run power supply to my mobile home about 30 feet away. I also want to supply a ...
Wanell Drake's user avatar
12 votes
2 answers
2k views

Does NEC allow a metal box to carry the ground connection between separate conductors?

I found this box: You can see that most of the conductors have their grounds crimped together in the deep part of the box. A box extension was added to this at some point, so it is rather deep, but ...
Ryan Mortensen's user avatar
1 vote
0 answers
58 views

How to properly ground panel box if I'm replacing all copper with PEX?

So I've got a 1950s house and I'm in the planning stages of a project to replace all the copper plumbing with PEX. The copper is in really bad shape, there are ancient gate valves all over the place ...
Livin' In The Mountains's user avatar
2 votes
2 answers
113 views

Can I use this disconnect between meter pan and main panel?

I'm planning to add a disconnect on the outside of my house between a meter pan and my 100A main panel (inside). This is a follow up question to an earlier question. After I've added the disconnect I ...
Christian K's user avatar
1 vote
1 answer
49 views

Routing ground bonding conductor across garage

I am planning to install an antenna on the gable at one end of a house. The electrical service panel is on the other end of the house, about 100 ft away. I plan to install an earth ground outside ...
D.Mac's user avatar
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How do I get my grounding up to code? Subpanel is missing grounding connector

I have a bit of a situation with my interior subpanel not being grounded properly. The interior subpanel does not receive a ground wire from the main service panel where it is grounded (to the water ...
Dong Shi's user avatar
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1 answer
23 views

Safety of direct bonding to exterior ground for CSST

The instructions for my yellow CSST propane line require it to be bonded where the service enters my home. They also specify not to bond at two points, and not to bond at the appliance. The appliance ...
aaron.kyle's user avatar
2 votes
2 answers
104 views

grounding in off-grid installations

I will spend some weeks completely off-grid with a AC inverter generator, a battery charger, a 12V battery and a small inverter. Why a generator and an the inverter? because I'll use the generator ...
jmann's user avatar
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2 answers
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How do I resolve a shore power ground fault on a bonded neutral generator?

I have a 50A RV with a custom solar setup using a Victron 12v Multiplus II 2x120v inverter. In normal operation I run shore power through an EMS and the into the Multiplus, then from the Multiplus ...
Solar_Samuel's user avatar
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two grounding rods for main panel: copper wire connections

I've seen diagrams on reputable electrical journals showing two grounding rods driven 8' into the ground with approximately 8' distance between then, the two rods connected by a length of 6GA copper ...
mr blint's user avatar
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1 vote
2 answers
117 views

Ground backstabbed into neutral with neutral on ground terminal on a series outlet?

1960s build, electrical redone with a 200 A Siemens panel (where each breaker is labeled with/serves two circuits) about 15ish years ago. Replacing a receptacle, I came across this series outlet with ...
msanford's user avatar
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2 votes
2 answers
257 views

Bonding at Meter vs. Main Panels

I think my head is going to explode trying to figure this out. Trying to go through and ensure the safety of my house's electrical system. It is a bit of a mess. Currently working on grounding and ...
alexok16600's user avatar
7 votes
3 answers
1k views

Best, and acceptable, connector for 12 to 20 ground wires in a junction box?

In a junction box with about 12, and may grow to 20, cables of size #14, #12, #10 what is the best, and alternative connectors to join all the ground wires together? Can I install a ground block, the ...
jay613's user avatar
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0 answers
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Grounding question: Honda eu7000is generator connected through PG&E backup power transfer meter

Earlier this year PG&E installed a free backup power transfer meter at our California property (info sheet here). Using the cable supplied with the meter, it connects our Honda eu7000is inverter ...
Dave Millman's user avatar
1 vote
2 answers
100 views

Is my metal building enough to bond subpanel to for a earth ground with neutral bar isolated? [closed]

I want to follow up my prior subpanel inquiry with another question for my understanding and overall grasp of neutral-ground-main supply-subpanel and building’s relationship. I have an all metal ...
john mcmiller's user avatar
2 votes
1 answer
450 views

Bond neutral to service box and earth ground in shop sub?

I have ran underground ~40’ of 600V pvc ins. alumaflex 4way wire from code grounded 200A meter/load dist. combo box on permanent service pole to ungrounded 200A shop subpanel inside of shop. I don’t ...
john mcmiller's user avatar
1 vote
1 answer
148 views

Can the neutral wire be grounded at a manhole (before the service disconnect)?

Consider the following scenario. A 240/120-V split-phase overhead service. The service conductors from the pole-mounted utility-owned transformer come overhead with a guy wire. They enter a weather ...
alejnavab's user avatar
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1 answer
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Proper grounding of old fuse panel now turned J-Box

I am working on my old house from the early 1900s. It has 100A service, a 6x15A FUSE panel that was turned into a sub panel powered by 2x 20A circuits from a small "newer" 100A breaker panel....
Dentpusher's user avatar
3 votes
3 answers
998 views

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 ...
divB's user avatar
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0 votes
2 answers
162 views

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 ...
David D.'s user avatar
2 votes
1 answer
201 views

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 ...
Matthew's user avatar
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2 votes
1 answer
53 views

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 ...
Armand's user avatar
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1 answer
87 views

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 ...
Scredly Smith's user avatar
0 votes
1 answer
84 views

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 ...
bwp8nt's user avatar
  • 125
2 votes
2 answers
320 views

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 ...
scott's user avatar
  • 123
0 votes
1 answer
109 views

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 ...
Christian K's user avatar
2 votes
1 answer
657 views

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 ...
Charles Chubb's user avatar
0 votes
1 answer
58 views

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....
Armand's user avatar
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0 votes
1 answer
83 views

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 ...
000's user avatar
  • 318
3 votes
1 answer
375 views

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 ...
000's user avatar
  • 318
1 vote
2 answers
123 views

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 ...
ehbowen's user avatar
  • 429
2 votes
2 answers
137 views

Is there any benefit to installing a second surge protection device at the sub-panel for long distances?

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 ...
Stuart McKenna's user avatar
2 votes
1 answer
569 views

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 ...
Shawn G's user avatar
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0 votes
0 answers
207 views

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 ...
Frederick's user avatar
0 votes
1 answer
147 views

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?...
Andrew Carter's user avatar
3 votes
1 answer
179 views

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 ...
Vince L's user avatar
  • 31
3 votes
1 answer
372 views

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 ...
Manny Maltese's user avatar
2 votes
2 answers
518 views

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 (...
Frank Lesniak's user avatar
0 votes
1 answer
144 views

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 ...
Mike R's user avatar
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5 votes
3 answers
6k views

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 ...
Jamin Grey's user avatar
1 vote
2 answers
187 views

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 ...
RoyalGoose's user avatar
9 votes
1 answer
497 views

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 ...
shoelessone's user avatar
2 votes
2 answers
2k views

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 ...
ehbowen's user avatar
  • 429
2 votes
3 answers
923 views

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 ...
Nicolas Guillaume's user avatar
10 votes
2 answers
3k views

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 ...
jay613's user avatar
  • 38k
0 votes
1 answer
619 views

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 ...
Rick's user avatar
  • 525
0 votes
1 answer
78 views

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. ...
ctaylor's user avatar

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