Questions tagged [grounding-and-bonding]
For questions dealing with grounding and bonding of electrical installations, and the specific requirements of such.
294 questions
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How can I tell if my home has an electrode grounding system?
I have a 1960s home located in Georgia with brick exterior where the outside electrical meter is located. My breaker panel is located close to the middle interior of the house on 2nd floor.
I have ...
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No ground to connect to for light/fan switch
This house was built in '65 with original wiring. There are no ground wires available to connect lights and exhaust fan for my bathroom. I added a yellow 12/2 cable for my vanity light with a ground ...
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Is there a limit below a panel's rating for bonding neutrals and grounds?
I have a 225Amp rated main breaker and panel box.
The neutral and ground bus bars are bonded directly to the neutral main and are full, unfortunately.
We want to add a 50A RV circuit to the panel, and ...
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How can I properly ground my service disconnect panel?
I am not sure my house is properly grounded.
The meter outside connects to a single breaker panel with a 150 amp breaker (I will call this the service panel). This service panel is not connected to ...
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New 200A Service to Barn/Workshop
I am having a barn built and plan to install 200A service, doing most of the work myself. My property is zoned agricultural, so I do not need an inspection by the County. Nonetheless, I intend to hire ...
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Is grounding an outlet only to its box enough?
There's an outlet in the front hall of my house near Atlanta, GA. I noticed scorch marks on the face, so I decided to investigate it a bit. My outlet tester indicated an open ground.
When I opened up ...
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Predator 5000 correct grounding
Will this be all I need to ground a predator 5000 portable generator: a 5 /8" by 8' grounding rod and copper cable to generator terminal? The generator will be used when needed for residential ...
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120V on fridge door handle when ground broken
Looking at a friend's fridge that I discovered had a broken ground pin in its power plug
Fridge chassis was causing painful shock when touching it. I measured 120V from fridge chassis to ground. I ...
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How can I add a neutral to a 240V to 120V circuit conversion?
We’ve replaced our furnace and a/c - which resulted in changes to the wiring from the furnace to the subpanel. The prior furnace was wired to a 240v subpanel with no neutral, which I assume was okay ...
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Is this part of the grounding electrode network and does it need to be hooked into my new service?
I found this on the outside of my house. As a note, the house was build in the 50s and the electric probably hasn't changed much since that time - the grounding all around is pretty bad. I'm doing a ...
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What are the bonding and grounding requirements for my heavy-up and new panel?
Jurisdiction is Dayton, OH - currently on NEC 2023.
I'm upgrading from a 100A service going through a meter on the outside of my house and into a main service panel inside my house.
The new system ...
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Is the ground screw on this 4" round weatherproof box OK by code?
I recently bought some house brand weatherproof boxes at my local big box store. I'm planning on mounting a lay in lug at the green grounding hole, so bought some longer #10-32 screws to accommodate ...
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Outdoor installation advice for 6 ga ground THHN wire in liquid tight flexible non-metallic conduit (LFNC)?
I'm running a 6 ga stranded copper THHN ground wire about 70 feet total outdoors in dedicated 1/2" LFNC to retrofit equipment ground (EGC) to old ungrounded outlets in the back side of my house.
...
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Can I use a galvanized well casing as a ground
I'm installing a sub panel the main is at the pole I have a galvanized well casing over 6' away from the first ground rod can I use the well as my second
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Water pipe bond in exterior disconnect
I've installed an emergency/service disconnect outside of my house. I'm bonding my grounds and neutrals in this enclosure. I have the following grounding and bonding conductors coming into the ...
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"Main" panel wiring
At my property the power company installed the meter with a box below it with a 200 AMP breaker. There are lugs inside to attach wires directly to the bar so they feed directly from that breaker. So....
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Can I use a hose clamp to ground a wire to EMT?
Question:
What are the rules for how to attach a wire to an already grounded EMT conduit? Can I use stainless steel host clamp and tighten down?
Background:
I was installing a metal box for a light ...
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using load center ground bars for neutrals
I'm replacing my main load center, with this unit, Siemens PN4264B1225C:
Note that the neutral bars extend only about halfway down the columns of breakers. This seems a bit inconvenient, especially ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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....
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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 ...
- 707
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984
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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....
- 4,594
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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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