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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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2answers
455 views

Is the ground wire connection grounding all switches in this box?

I am installing a Z-wave switch (I have done others), but this one is different. There are three switches in this junction box. However, only one switch is grounded (not one I am installing), and ...
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2answers
435 views

3 hots, 3 neutrals, 3 grounds; so confused

We have a 78' rancher here in Texas we just moved into and just replaced all the power receptacles/ outlets. So of them were tricky some of them were straight forward, the room was split up into two ...
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1answer
730 views

Should a stove flue be grounded for lightning protection?

I have a freestanding wood burning stove that has a metal flue straight up through to the roof. The existing stone chimney with aerials is taller than the new flue (see pic). Should there be an ...
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2answers
257 views

Ungrounded Desktop PC; Workaround to Remove Static Charge?

Background I'm in China (hot, dry area) for the summer and am a guest in an old (1980s**) single family home. Because I am working all summer, I brought my desktop HP computer with me. After ...
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3answers
394 views

Ungrounded GFCI Outlet with 3 pronged connection

I have a GFCI outlet on top of my pergola outside that had solid 3-conductor wire ran from there to an outlet on the other side of my patio when my parents built the house. My Mom wants me to put ...
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2answers
199 views

What is the functional difference between using a ground wire, and grounding to a fixture?

Is one method better than the other? How so? In the possible event that one has both options at their disposal, which one should they choose? An example where you would have both options at your ...
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2answers
580 views

Grounding a Ballast for wood enclosure when there is no metal?

I have a big 6'x4'x3' enclosure (glass and wood) for my Tegu monitor. The external magnetic ballast for my fluorescent light broke and I would like to replace it with an electronic ballast. The ...
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2answers
283 views

Would using a grounded extension cord negate the effects of a ground prong missing from device?

Specifically: I have a PA System with the ground wire missing. It has shocked me in the past and I'd like to use it. Short of a repair (which is coming), would using a grounded extension cord from ...
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3answers
212 views

Why is there a live and a neutral in a wall connector?

I get the ground. Since you can plug the plug in either way there is no way for the appliance to know what's in what wire, right?
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3answers
1k views

Installing Pendant light with gold, silver and bronze coated wiring

I bought some used pendant lights that 3 plastic coated wiring in silver, bronze, and either gold or green. All the wires are silver. I'm assuming the wiring is done that way because the wires are ...
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1answer
443 views

Can ground wire be downsized mid run?

I'm planning on running some schedule 80 PVC conduit in my garage to add extra outlets. At the same time I want to ground the 2 post rack I have in my garage. A few related questions that appear ...
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4answers
116 views

Equipment ground

I am helping family with finishing and upgrading the service to a separate garage 30ft from the house. Currently, there is 12-2 NM w/ground on a 20 amp breaker cord-capped and plugged in to a ...
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1answer
4k views

How to connect a 3 wire plug to a 2 wire outlet?

Bought a vent fan that came with 3 wires, but homes here are only 2 wires (not sure which but no ground). What to do with the extra neutral wire? Should i cut it or twist it with the other two??
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1answer
106 views

How to connect a detached garage and house electrical panel at the meter?

The meter is in between my house and the garage. Can I connect the service conductors from both panels to the same lugs at the meter? Do I handle both panels grounding and neutral bars as 'mains'? ...
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1answer
2k views

Ground wire with 1/2 EMT Conduit

Do I need to run a ground wire with conduit? I have installed a line of lights using 1/2 EMT and tied into another circuit that is grounded coming off the panel. There are about 7 lights in a ...
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2answers
2k views

adding a ground wire to a 2-wire breaker panel

I am trying to run new ground wires from outlets in the house into my breaker panel that handles an old 2-wire system. There is only one panel after the meter that has the main cutoff, the various ...
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3answers
4k views

European Light Fixture in the US - Does it require a ground connection to light up

A bit of an oddball question. We bought, through a US distributor, a ceiling light fixture that was made in Europe (Netherlands). It is a metal fixture, connected to the ceiling via a metal chain, ...
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4answers
278 views

Can an inspector require a specific grounding technique?

I had been taking classes to become an electrician at one of the bigger community colleges in my area (specifically LBCC) and my brother had been doing some renovation on his own home and asked me to ...
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3answers
2k views

Grounding an old 2-Wire system in my bathroom

I have been remodeling my bathroom in an old house with a 2 wire electrical system without conduit. It had a 2 prong outlet at the lower wall that I've replaced with a new standard 3 prong. Also I'...
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1answer
164 views

Adding Ground Conductor from Service to Upgraded Sub-Panel

Upgrading electrical system with new 200 amp (main disconnect) service panel then underground 110 feet to house and a new 200 amp sub-panel. There is a 3 wire feed of 4/0 Au in 2" PVC conduit (with ...
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1answer
402 views

How to ground a junction box extension when using a non-metallic box?

I have a water heater that gets electricity from a dryer cord plugged into an outlet on the wall. I need to remove the outlet and replace it with permanent wiring and some form of quick disconnect. ...
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2answers
8k views

Dangers of connecting ground to neutral?

In my living situation, there is no ground wire at the building. There is a ground AND neutral bus in the breaker box, but it doesn't extend to this separate building, which I'm living in. I've got ...
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2answers
4k views

Is it safe to substitute a 10-gauge wire for ground strap on dryer?

I am backfitting a dryer with a 3-prong plug. The manual says to connect the body to the neutral terminal using a copper ground strap. I don't have a ground strap and none of the stores around carry ...
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1answer
335 views

Anything wrong with this ground wire? Is it supposed to be insulated?

Panel is from the late 1970's. Looks like there was some insulation on the ground wire, but most of it has come off. It's the same way through the crawlspace.
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1answer
154 views

What would cause arcing between equipment connected to each other where power is connected to different circuits?

Scenario In my "datacenter" (read: basement), I've got a rack of various computer and A/V equipment plugged into a UPS, and into a standard 120v outlet on one side of the room. This equipment works ...
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2answers
197 views

What did cable installer use to tap onto my service ground?

I have a somewhat mysterious service ground apparently underneath a concrete entryway. All that is visible now is a heavy gauge bare copper wire coming through the cement. When the cable company ...
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3answers
3k views

Using receptacle mounting screws for ground connection

I will soon be adding some outdoor wiring using weatherproof metal boxes and EMT conduit. I noticed when I was playing around with a multimeter that without a ground conductor between a receptacle and ...
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1answer
266 views

Grounding subpanels located ~100ft from main breaker

Based on this question on EGCs in conduit (in the context of branch circuits) and this question on conduit as a sole ground source, I would like to know whether two subpanels, located ~100ft from the ...
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1answer
239 views

Does 5V DC power supply require Ground wire?

I got this 5V DC 8A power supply for some 5V LED strips. For the AC input connections it has Line, Neutral, and Ground (numbers 1, 2, and 3 in attached image). My question: For the 120V AC input is ...
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1answer
5k views

Adding second ground rod. Is this an acceptable way of bonding?

I recently found out that our sole ground rod is only 4 feet long. That said, I want to add a properly-sized ground rod to "improve" the grounding system and hopefully comply properly with the ...
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1answer
282 views

Attaching a grounding pigtail to a junction without a tapped hole?

I'm trying to ground an outlet in my home to the metal of the junction box. I'm using a grounding pigtail of 14AWG wire with a 10/32 terminal attached to one end. Unfortunately it seems the metal ...
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2answers
7k 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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2answers
1k views

How can I tell if my two-pronged outlets have ground wires behind them?

I have two-pronged outlets in my apartment. They look like this: Is there a way to check whether they have a ground or not? Some guides talk about use a circuit tester and touching the screw, but I ...
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1answer
717 views

Master showerhead has electrical current, what to do?

Good morning, I purchased a home last month and have been in the process of updating/renovating. My first night in the home was Saturday night. I went to take a shower, turned the water on and got in....
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1answer
3k views

Why am I getting shocked by a water heater?

Background: I live in Metro Manila, Philippines where the electric distribution company, Meralco, delivers split-phase power to residential buildings. Our old (1980s) Meralco service drop consists ...
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1answer
326 views

Can I use a busbar as a ground in my travel trailer?

I need to ground my inverter and a few other items from my fuse box. Can I use a single busbar, mounted to the floor, as a ground. If not, can you offer suggestions?
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3answers
182 views

Unusual wiring in receptacle connected to switch

I have a receptacle with a wiring configuration I am not familiar with (see picture). The receptacle is controlled by a single pole switch elsewhere in the room. The two black wires are pig-tailed ...
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1answer
652 views

Do I need a permit to ground an outlet?

At the moment, I have a receptacle that has no ground but is using three prongs. I plan on fixing this by installing a ground screw in the electrical box and routing a copper wire from that to the ...
4
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1answer
598 views

Outlet with ground wire attached to socket ground and neutral

I am replacing some sockets with new sockets, that also contain USB charging receptacles. I have done this before. The question I have is with one of my outlets in my rec room (built in 2007, ...
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0answers
50 views

Some of our electonics are being fried

Would having the ground from a 277/480 panel hooked up to the ground of a 120/240 panel have the potential of causing problems, such as fried electronics?
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4answers
866 views

How is a a two phase, three wire, grounding plug such as a NEMA 6-20P safe to use?

I'm looking to use a piece of commercial equipment in my home, and I've been reading about AC current and circuits. I currently have access to an old style non grounding 10-30 style plug, which I ...
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2answers
546 views

How can I add a ground wire?

I have this metal electrical box that has no ground wire. I was thinking that I could buy a ground screw and screw that into the side of the box. There's a wooden frame on all sides. Afterwards, I ...
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2answers
696 views

How to run ground, for electric supplied by generator and batteries through a inverter

I have a panel that is powered from the generator, it runs my major appliances. One of the circuits feeds my inverter/charger , which charges my batteries. A 2nd. panel receives power from the ...
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3answers
6k views

How to check if my house is properly grounded?

I live in an very very old house, recently I purchase a surge protector (APC P5B-GR) and it came with "grounded" light indicator, when I plug the surge protector into my house wall outlet, the ...
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1answer
4k views

How do I/can I install a dimmer without a ground?

Full disclosure: I know very little about electrical work and was hoping for an easy fix. I have been getting a buzzing from my dimmer every time the dim feature is used, and I read that a low ...
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1answer
99 views

grounding wires overkill

I have been replacing some light fixture recently and haven't seen any info on connecting grounds wire together with a wire nut when a)one has been grounded to the green screw on the plate and the ...
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1answer
381 views

Grounding a dryer

I have 4 prong dryer outlet that the previous owner wired up with 10 ga 3 conductor wire. He wired it "correctly" with a red, what, and black conductors. The ground terminal isn't connected to ...
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3answers
2k views

Safe way to remove paint from ground wire?

I'm addressing an item on our house's inspection report where a GFCI outlet had been ungrounded. I turned off power at the breaker box, popped the outlet cover off and found the ground wire neatly ...
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2answers
245 views

How to connect a 230V jointer to a pre 1996 dryer circuit?

I would like to connect a jointer to my dryer receptacle but I am concerned about proper grounding. The jointer draws 8.5 amps at 230V and has a NEMA 6-15 plug. The dryer is plugged into a pre-1996 ...
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6answers
438 views

Buzzing on laptop, stove and other electrical devices in Canary Islands

I have a friend who has moved to the Canary Islands (Spain) for a while. She has told me that there is a buzzing that she feels when she touches many of the electrical devices. I noted something ...