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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How to properly bond metal junction box with 6 AWG conductors

What is the appropriate way to bond a metal junction box containing a receptacle wired with 6 AWG wire? It seems that most metal junction boxes have a 10-32 tapped hole to accept a ground screw but ...
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0answers
26 views

How can turning on or off a circuit beaker affect a ground on a different circuit?

I am addressing electrical issues in my parents house and came across this situation..Circuit breaker "A" controls the downstairs bedroom outlets. Circuit breaker "B" controls the upstairs bedroom ...
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1answer
106 views

Main service electric panel has no neutral wire - both neutral and ground wires on same bar - sub panel question

My main service panel is 200 amps and has only 2 black wires coming in, there is no neutral wire like I was told is commonly how it should be. All neutral and ground wires for the individual circuits ...
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3answers
60 views

Can I safely create another 120V outlet using the fourth neutral wire from a 4 wire 240V line?

I recently just ran a 4 conductor 240 volt line out to my shed. I chose to run the extra conductor just in case, but I do not currently need it for my application. My question is, can I add a 120V ...
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2answers
40 views

Grounding an industrial pipe fitting lamp, which wire to use?

I'm working on creating an industrial lamp using black metal pipe fittings. Since this pipe is all metal it should be properly grounded. I'm looking around for 16/3 or 18/3 lamp cord, but finding it ...
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2answers
8k views

Why doesn't my motion sensor light work?

I want to install a simple motion sensor (Lutron Maestro MS-OPS2) on a single pole switch in my garage. When I installed it the light would not turn off. The instructions (PDF) that come with the ...
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2answers
81 views

Connecting earth wire with motor water pump

I am going to rewire my house and at present we have no earth wire anywhere in our house. Even the wires/cables available here in the market only have one phase wire and one neutral wire in them. So I ...
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0answers
26 views

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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1answer
51 views

Is a wire coiled around a post adequate for grounding light fixture bases?

I was changing a light bulb in a ceiling light fixture. I unscrewed the nut and removed the glass cover. When I was replacing the bulb I noticed that there was a copper wire loosely coiled around the ...
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1answer
85 views

If i use one ground wire for two outlets, will my equipment get damaged?

If i use one ground wire for two outlets, will my equipment get damaged? Here is what I want to do: If my air conditioner sends voltage through the ground wire shared with the outlet powering my ...
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2answers
53 views

Bonding Neutral and ground in a service panel

My home has a 200amp meter box with 6 double breakers beneath the meter under a flap - 4 breakers are 60amp (stove heater, AC, unknown) - there are also 2 100amp breakers going to load centers inside -...
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1answer
71 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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1answer
43 views

Three sets of wires and no clear way to ground

We're changing the extremely old fixtures in our hallway with some sleek modern LED lighting. Upon removing the fixture I discovered three sets of twisted wires - double white, black-red (the fixture ...
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4answers
105 views

Which wire is the ground in this light box?

So I'm trying to fit a new light fixture that's got the usual black, white, and copper/green wires coming out from the light itself. However, when I took off the old light and looked at the wires in ...
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1answer
26 views

Installing grounding rods…without hitting something critical?

Is there an easy way to figure out where a safe location for grounding rods are? I don't want to hit a sewer line or a water line. Our house is on a raised foundation and has a crawlspace underneath. ...
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3answers
212 views

Tester showing ground, but I am not seeing a ground

In the original portion of my 1940's house, I have three outlets that have wires being ran using conduit. When I test them using a three prong tester, it shows that they are grounded, but when I open ...
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3answers
114 views

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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1answer
18k views

Is there a length limit on grounding conductor to ground rod?

My service panel is over a concrete patio, it was improperly grounded in the crawlspace. I cannot drive a proper ground rod in the crawlspace so I would like to drive one into the earth on the side ...
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3answers
208 views

Is it safe to ground a portable generator using the house ground at the service panel?

I've bought a portable generator that I'll use when the power goes out. The instructions in the paperwork state that the generator needs to be grounded before use. Can I use the house ground at the ...
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2answers
38k 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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0answers
18 views

Electrical — Open Ground on One Tester, Correct on Two Other Testers

Very Simple: I have a multi-unit building that had two separate outlets in different rooms with open ground readings on an outlet tester. Grounded each separate outlet to a nearby junction box with ...
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3answers
70 views

Is is safe to only use a gfci with no ground wires downstream?

If you use a gfci outlet and the rest of the outlets downstream don't have a ground wire attached, are they still considered grounded and are they safe?
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2answers
50 views

Is this iron pipe lamp grounded/insulated enough to be safe?

I replicated this lamp from a Home Depot tutorial. http://blog.homedepot.com/diy-industrial-lamp-cool-desk-lamp-made-from-pipe/ I'm worried that the lamp socket isn't isolated enough and that the ...
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1answer
57 views

How should grounding be handled for multiple RV pad feeds?

Trailer pads were wired at my deer camp over 15 years ago. The main power pole has meter with 200 amp disconnect. From the meter a 3 wire service was run overhead to each pad. At the first breaker ...
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3answers
406 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
91 views

Should I install GFCI outlets or run new grounded cabling in my older home?

I am renovating an old home(90 years) that my wife and I just purchased. The electrical system in the house is outdated - some of the outlets appear to be knob and tube but most are the brass and ...
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1answer
75 views

How do I rewire this electrical panel?

House was built in 50s or 60s, and there was a bundle of wires all grounded to the main ground lug. I removed them and began to separate to disperse them along the ground bar, and three of them are ...
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2answers
100 views

What problems might a single ground rod above 25 ohms resistance cause?

The Electrical Code (USA) requires that a single ground rod have a maximum resistance to ground of 25 ohms (NEC 250.53(A.2)). If this isn't met, an additional ground rod is required, but no resistance ...
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1answer
21k views

Where do I attach the grounding conductor to my bedroom light fixture?

I have a problem, I broke the center piece that holds the glass part on my light fixture in my room. I purchased a replacement and removed the two screws holding my fixture on to the ceiling. Now I ...
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3answers
46 views

short to earth 120 v ac breaker

If a hot wire is shorted to earth i.e. the hot 120 v ac wire that comes out of a Ex. 20 amp breaker is directly connected (short) to a grounding rod, why wont the breaker trip.
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2answers
24 views

Sub panel grounding

I replaced an old FPE sub panel that has no ground wire with the feed. The main panel is a new 200 amp with a 100 amp breaker feeding the sub. The wire is #2 copper ( 2 hots and one neutral in 1 1/4" ...
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4answers
546 views

Should data ground wires be attached to plumbing?

I have ground wires attached to copper plumbing on the house side of the dielectric coupling. The telephone service box has a ground wire which I found attached to copper plumbing. The satellite ...
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5answers
7k views

Does a grounding wire from a breaker panel to an outside grounding rod need to be in conduit?

I've got a breaker panel in my detached garage (it is not a sub-panel, but is a primary forked off just past the meter). The panel seems to be wired correctly- the neutral and ground bars are tied ...
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1answer
32 views

I have more than 1 submeter off my main service do I need a (8ft 5/8"), grounding rod for each sub meter?

I have more than 1 submeter off my main service do I need a (8ft 5/8"), grounding rod for each sub meter? They feed outdoor receptacles. Thanks for any help.
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3answers
264 views

What reasons are there to rewire an ungrounded circuit instead of adding GFCI protection?

The NEC allows replacing non-grounding-type (2-prong) receptacles with grounding-type (3-prong) receptacles by adding GFCI protection at the breaker or first outlet. What reasons might there be for ...
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3answers
115 views

Why are ungrounded GFCIs required to be labeled?

I discovered in my new house that someone had incorrectly connected grounded outlets (without any ground connected) to the knob and tube wiring. I have read that the outlets can be made safe by ...
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1answer
42 views

Why must all outlets share a ground conduit?

I was reading this answer in my quest to see how possible adding grounds to my existing knob and tube house would be, and was suprised by: Are you asking if it's OK to run a separate ground wire ...
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1answer
59 views

Is it safe to ground electrical appliance?

I have a large lamp with a metal frame which is not grounded(which I thought is a legal requirement for metal framed appliances in my country, but perhaps not). Is there any risk if I swap out the 2 ...
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1answer
51 views

New Main Panel & Sub-Panel - Hooking up Ground / Netural - Connecting to Plumbing / Ground Bar

Older 1960's house. The outside panel is a FPE Stab-Lok that needs upgraded. Will be using this panel to upgrade it, which has a 125-amp main breaker: The current box is directly to the left of the ...
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2answers
71 views

Apartment with no grounding/earthing… do I really need it?

Just a quick question. I don't know much about electricity, so here it goes. I got an apartment where there is no grounding. In fact, there is no grounding for the whole building. I have 110v and 220v ...
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1answer
41 views

Does thermostat need to be grounded?

If a thermostat is connected to an air handler, which is connected to the main panel and has a ground wire, should one of the thermostat wires be connected to the ground?
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3answers
99 views

Is this outlet grounded?

My house was built in 1949 and some of my outlets look like this guy while others run updated Romex into plastic boxes. With the wires coming through the conduit in the plaster, are these grounded ...
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1answer
78 views

Can I bury a bare ground connecting rod?

We just ripped out an old rotting deck at our house, this exposed the wire that connects the electrical panel to the grounding rods. There is a PVC pipe encasing the wire from the panel to ground ...
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1answer
39 views

Restrictions on tying grounds together?

I'm replacing the hard line to the garbage disposal. Instead of the hard line i'm installing an outlet. The box where the garbage disposal switch is located has two circuits in it. One is for the ...
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1answer
173 views

Is there a safe alternative to electrical grounding for computers in Argentina?

I came across this APC product page for Microsol Isolator Modules, which purportedly provide "safe power in places with poor or nonexistent grounding." The unit is meant for Brazil, so it won't work ...
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5answers
22k views

3 wire service to panel… neutral and ground wires on the same bar? [duplicate]

I'm getting two conflicting reports and was wondering if anyone can help me. I was told that on the distribution panel, grounded conductors (neutral) and ground wires need to be separated in the ...
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3answers
171 views

A closed breaker has some voltage going through - how is that possible?

Some background first: I have a single-phase system (220V). I installed an RCBO direct from the external supply and then the output from that went into the main breaker panel outside the house. I ...
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1answer
52 views

Replacing single pole light switch with dimmer

I'm trying to replace a single pole light switch with a Leviton 6674 dimmer. This dimmer has four wires including the ground wire and a wire which is tagged and used for three-way applications which I ...
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3answers
3k views

What is a 'grounded neutral' and how bad is it?

I bought an electrical device a few months ago. A few weeks ago, it failed, complete with the release of magic smoke. I contacted the company, and they've had me mail it to them and have been ...
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0answers
100 views

Underground Wires + Bare Ground Condutor, entering building

I had a setup in which underground aluminum wire coming from a garage (detached structure) travels through a ¾ pvc conduit into what seems to be a rather shallow depth trench. This installation was ...