Questions tagged [grounding]

Grounding, also earthing, refers to the practice of providing a direct conductive path to the physical ground for an electric short to a chassis. Tag questions involving the installation or retrofitting of grounding with this.

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55 views

Installing New panel

I am installing a new service in an outbuilding, It is not at my residence so I can't test it readily. On the neutral/grounding bars in the panel, it appears as if the neutral and ground are all ...
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200amps service - ground rods instead of pipe connection

I upgraded my main circuit breaker today from 150amps to 200amps. See my previous posts here on the same project: Is RC2040M150CH MSP upgradable to 200amps main circuit breaker Neutral on main ...
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Grounding Rod for Residential application

I currently live in Florida, where the soil is basically sand and clay. My question is: how should my grounding rod for my house be installed? I've managed to dig up the grounding rod that was ...
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Not properly grounded/earthed

I know next to nothing about electricity and wanted to ask for some advice. Apologies for any cross-posting. I moved into a rented house in Spain a few months ago. Turned out it wasn't grounded. ...
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1answer
24k views

What to do with ground wire when installing ceiling fan on ungrounded branch circuit

I removed an old ceiling fan and I am replacing it with a new one. My home was built in the 60s and I'm installing so it works off one switch. After the removing the old fan the ceiling revealed ...
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1answer
86 views

Are speaker wire output negative posts on receiver common-grounded? [closed]

I am buying a subwoofer (powered Sunfire HRS 12) that has high level inputs (bare speaker wire) and it says that it has it's negative posts joined (common-grounded) and that my receiver or amp also ...
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5answers
4k views

Why are ground wires required to be so large if a short results in an immediate breaker trip?

The purpose of ground wire is just to carry current in milliseconds enough to trip the circuit breaker, it won't even get hot. So what is wrong with using very small ground wire? For example. You are ...
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1answer
315 views

Adding ground to replacement sub panel

We recently purchased a new home that has a 16 x 30 steel building in the back yard approximately 100ft from the main panel. The building has power run to it off a 60 amp breaker in the main panel. ...
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1answer
3k views

What is the difference between a coaxial grounding block, an antenna discharge unit, and lightning arrestor

I've been reading about grounding outdoor TV antennas but these terms seem to be used interchangeably by various articles on the internet. For example, this article seems to make a distinction ...
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2answers
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Outlet tester results for open ground on mixed circuit

I have a US house built in 1958 that has been remodeled in many stages over the years. I recently tested a circuit that included ungrounded outlets in the old part of the house. A number of years ago, ...
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Should outdoor deck gazebos or grills be grounded?

We recently put up a put up a gazebo on the deck of our condo unit to provide some much needed shade. The gazebo is 10'x12' and the deck is 12'x16'. The frame is light gauge hollow steel thats powder-...
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How to solve a miswiring of neutral and ground

An Outlet in the dining room which had a microwave plugged into it stopped working. I found 120+ volts from hot to ground and 96+ from hot to neutral. Also at one point my "three light tester" showed ...
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How to mark an outlet as ungrounded

I'll be replacing my ungrounded three-prong outlets with tamper-proof GFCI outlets in my home in the USA. Maybe I'm overthinking this, but is there a way to 'universally' mark the outlets as ...
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1answer
162 views

Grounding to the box and 3 Prong Receptacles

Recently bought a flip house. The flippers replaced every two prong receptacle with a three prong and a bootleg ground. In the process of undoing that unsafe practice, I've discovered that almost all ...
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2answers
2k views

Adding a ground wire to old 2 wire wiring before extending to grounded wiring.

I am remodeling a house and the partially unfinished attic has old ungrounded, 2 wire wiring. There are 2 circuits. There is a finished bedroom with one circuit on 3 walls, and a second on the 4th ...
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Can you run earth ground thru conduit into home?

I have a detached garage that I am running coax and cat6 to. Running pvc conduit underground from house to garage. My question is when the conduit comes up out of the ground and into a 1 gang pvc box ...
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801 views

How can I connect a new ground rod?

Illinois house, built 1963. Not sure if there is a ground rod or just the water pipes used for ground. Want to put in another/first rod. Can I connect it to the clamp on the electrical meter housing ...
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231 views

Would my grounding conductor be “choked” out by metallic conduit?

I’m in Hawaii. The G.C./engineers have told previous electricians that they want the bare ground coming up through slabs to building steel to be in a short piece of rigid conduit for protection of the ...
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1answer
518 views

Is a Redundant Ground at Sub-Panel Permitted? Useful?

I've searched the forum and haven't found an answer for this exact situation. Here's the configuration: Main 200A service panel at one end of house (exterior), and 100A sub panel at opposite end of ...
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78 views

GFCI Grounding Issue

I'm trying to replace a two prong outlet in my garage with a GFCI. The receptacle line is fed from a light switch on the wall, and the load runs to an outdoor(one bulb) lamp post. The general ...
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486 views

Off Grid PV System Grounding Question

Hi I am installing an off grid solar system form my orchard and shed. Basically there are some pumps, lightning and some household appliances like refrigerator etc. I have read many articles about ...
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1answer
3k views

Main Panel with separated neutral and ground

A customer of mine had a friend wire his basement. He did a neat job, but when I opened up the mailnpanel to add a circuit, I noticed he had installed ground bars and separated them from the neutral ...
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1answer
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how to replace surface conduit for a two-wire lighting circuit?

I have an old house with unswitched knob-and-tube running to a ceiling fixture. Previous owners ran surface conduit to a wall switch and to a second light fixture over the sink; none of this was ...
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1answer
1k views

Can I run a new ground wire from junction box in attic down the wall to replace 2 prong outlet

I have an older home where some of the house has updated electrical and some doesn't. In a few rooms I still have several of the 2 prong outlets with no ground wire in the box and I want to replace ...
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341 views

Grounded Conductor Sizing

OCPD: 400A System: 480/277V Ungrounded conductor size: 500kcm How do I find the minimum size Cu THHN grounded conductor? I tried using T250. 102(c)(1) from 2017 NEC 70 and I got 1/0 AWG but I am not ...
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How to add a gfci and surge protector to pool pump line?

I want to add a gfci and surge protector to the 240v circuit for my pool pump. The 12 guage power wires (red and black) and ground (green) run from the corner of yard directly to the main breaker ...
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2answers
2k views

What to do with dimmer ground wire?

I am replacing an old dimmer switch with no ground wire with a dimmer switch that has a ground wire. The metal box in my wall is grounded, but there is no ground screw or anywhere else to attach the ...
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2answers
1k views

Is this ground attached to the wrong water pipe? [duplicate]

I recently noticed that I have ground wires attached to metal water pipes in my home, as shown in the following image. The area marked A is where the water service enters the home with that blue ...
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3answers
152k views

Is it okay to have an ungrounded light fixture?

I recently moved into an older home (built in 1968) and have been replacing some of the older light fixtures. We pulled down one of the lights and found that there is a ground running into the box but ...
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1answer
357 views

Grounding chandelier in old pan junction box

I recently removed a crossbar from one of my ceiling pan junction boxes and replaced it with a hickey. As I understand it, having the crossbar was a bit odd since a mounting stud was already available....
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323 views

Electrical wiring/grounding - continuity via metal junction box?

Question about grounding in a metal junction box. I have a 4x4 steel junction box, with 4 cables coming into it. 1 cable comes in from the main panel, 3 separate cables go out to 3 separate ...
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1answer
93 views

Is it OK to have a redundant path to earth?

I have a home with separate flat on the grounds. Our system, in South Africa, has 230V live and neutral, supplied by the national grid operator through a distribution board, via isolator. It then ...
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1answer
395 views

No ground wire, no box (old or new) trying to install light fixture

I just removed an INCREDIBLY old and ugly Hollywood light fixture from my bathroom. The wall now looks like the picture below. I bought a box and a Snap Tite connector. I even got a hold of some ...
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7k views

What can I do about a severed grounding wire?

After doing some yard cleanup, I realized that my panel ground wire was severed. I went to Home Depot and was told that they only carried a temporary solution (see attached photo) and that I should ...
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2answers
5k views

What is the purpose of this grounding screw in a plastic electrical box?

Upon inspecting my light bulb socket in the garage of my new construction home (2018), I found a random grounding screw which wasn't wired to anything but attached to some bar. Does anyone know what ...
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94 views

main breaker panel to sub panel

The main breaker panel has the grounds and neutral hooked together and has bonding screw installed. Where do I put the ground wire for the sub panel? Do I put it on the neutral bare where the white ...
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2answers
2k views

Grounding sheds and garages

I have a detached garage whose wiring is fed by just two conductors running back to the main panel. There's no ground wire in the feeder and no separate ground rod at the garage. The feeder has only ...
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1answer
6k views

Can plug an air-conditioner into a outlet with an adapter

So I'm getting a window unit and I've read online that you should never plug an AC into a power strip or even use an extension cord. My room has no three prong(grounded) outlets, can I plug the AC ...
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3answers
44 views

verify if the Ground cable is connected to Neutral cable

I want to verify if electricity outlet is grounded. For this I did a test using a bulb connecting it to Phase and Neutral and it lit (to verify if bulb works). Then connected with Phase and Ground and ...
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111 views

120V measured between different outlet grounds

I'm experiencing some electrical issues with the apartment I'm subletting. While connecting up a projector/speaker setup using outlets from different sides of the room, we discovered (through means of ...
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2answers
112 views

Where should shielded data cables be grounded?

In the comments on this question (Using PEX as wire conduit), the issue of grounding shielded data cables on one end vs both ends came up. For any arrangement of cables (ex. single cable, multiple ...
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23k views

Do I need to ground black gas pipe?

The backstory: My HVAC friend, my dad and myself installed new gas pipes in my house after the 40 y/o pipe started leaking. Suffice to say, the old pipe was beyond repair, every retightening of the ...
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63 views

Grounding rods and testing

I'm looking to install a couple of vertical grounding rods for a friend's property in the middle of nowhere (very country - The earth is mostly clay, rocks and sandstone) From the limited research I'...
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2answers
9k views

Converting a Samsung Dryer from a 4-prong cord to a 3-prong cord?

I just bought my first home and I need to replace my 4-prong cord on my dryer to a 3-prong. I've removed the four prong and now I see this: I know how to hook up the three prong, I'm just unsure ...
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1k views

Plugging compressor into 240v dryer plug (NEMA 10-30R)

I've recently received a compressor that has a NEMA 6-50P plug on it. I would like to plug it into my current dryer receptacle which is a NEMA 10-30R. Voltage and amperage-wise, I think everything ...
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1answer
124 views

How can I ground an appliance with a CEE 7/7 plug plugged into a step-up transformer with a “universal” female outlet?

I'd like to use a European appliance (5A 208-240V 50/60Hz 900W) with a step-up transformer such as this one. The appliance has a CEE 7/7 Schuko-French hybrid plug. The transformer has a female ...
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Distance between grounding rods

Here in Hampshire County, WV we are required to have 2 grounding rods. Question #1 How deep do they need to be? #2 This mountain was formed by a rock glacier before I was born. I can drill down 18",...
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1k views

What are the proper steps needed to install a grounding rod?

We had an electrician friend upgrade our service panel and install grounding rods. I've read that you have to drive the rod flush to or below ground. Please see these pictures. Is this okay? Do I need ...
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water heater circuit requires a ground connection

Purchased a British Standard water heater with 3 supply connections -live, neutral and earth. The circuit design requires a ground. Tried to fix the water heater in Philippines which only has 2 pin ...
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How to check grounding connection

Background: in my neighborhood the water company is renewing the pipe line, taking away the old metal pipes and replacing them with plastic pipes. The electrical network company has thus sent a letter ...

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