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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1answer
16k 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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0answers
15 views

Multile (Isolated?) Grounds for Electronics Test Equipment [on hold]

So I'm not really sure which forum (this or the Electrical Engineering Stack) was the more appropriate one on which to ask this question, so I figured since it had to do with possibly digging a hole ...
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3answers
196 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
34k 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
51 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
25 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
53 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
376 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
77 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
73 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
64 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
20k 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
45 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
18 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
529 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
26 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
257 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 ...
4
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3answers
111 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 ...
0
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1answer
38 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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vote
1answer
54 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 ...
0
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1answer
36 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
62 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 ...
0
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1answer
35 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
92 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
76 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 ...
0
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1answer
38 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 ...
3
votes
1answer
154 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
18k 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 ...
2
votes
3answers
152 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
46 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
68 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 ...
4
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4answers
6k views

Could bad grounding cause sparks and fire when connecting the cable box and TV?

I just moved into a home built in 1955. During inspection, it was noted that none of the outlets were grounded even though they had three prong outlets installed. Per our agreement, the owner ...
0
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1answer
58 views

TV antenna installation: How to ground

I'm going to be installing a TV antenna with a mast. I want to make sure I ground everything properly. As far as I can tell, I need to ground the antenna via the coax and a grounding block, and then ...
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1answer
87 views

why are 120v coming out of my light switch plate screws?

While troubleshooting a dead GFCI receptacle in my bathroom I discovered that a nearby light switch plate's screws have 120 volts coming out of them. The GFCI was reading 1.5v from hot to ground on ...
5
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1answer
132 views

How do I handle ground wires in 2-gang box with circuits coming from separate breaker boxes

In my house, I have 2 breaker boxes- in the basement there is a 200-amp main box, with the ground and neutral bars bonded. Feeding the main floor, there is a 100-amp sub-panel (branched off the main ...
5
votes
3answers
650 views

Ungrounded outlets, what are my options?

I'm currently in a lease on an apartment as a tenant. I've done quite a lot of small-time electrical work on places I've lived in the past: changing out outlets, switches, two-way switches, etc. I'm ...
8
votes
4answers
11k views

Acceptable ground to neutral voltage?

First of all I'm pretty sure I know the theory behind the effect. I know about the inductive and capacitive coupling, about 3-phase balance problems and about ground bounce, so this question isn't ...
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1answer
66 views

What should I do with the ground wire on a replacement bathroom fan motor?

I bought a new motor for my bathroom vent fan and it came with a ground wire. The old motor does not have a ground wire, or not that I can see. What should I do with the ground wire?
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3answers
116 views

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 ...
2
votes
2answers
126 views

What could be causing an earthing fault in a specific socket?

When I connect a device to one specific plug socket, I get a current in the device body. When I connect the device to any other plug in my house, then the device is normal, i.e no current in the ...
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votes
1answer
40 views

No electric in my garage

My electricity in my garage went out recently. The UF wires are buried righht next to a large tree, so im assuming the roots had something to do with it. Well it rained for 2 days straight and my ...
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1answer
74 views

Another sub-panel questio

Improving unfinished basement in 7 year old log home to have a small shop and a mancave Installing sub panel 40 wire feet from main panel mainly because i don't want to home-run all my circuits to ...
5
votes
4answers
541 views

How do you ground residential network equipment?

I needed to run some Cat5e UTP network cables and decided to add network outlets to most rooms, run new phone wiring and RG6 as well. Much of what I've seen and read about residential and small ...
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2answers
59 views

Installing grounded light fixture on box with no ground conductor

I'm installing a brand new motion activated security light to an existing box on my garage. After removing the old light, I notice it only has white/black wiring while the new light fixture has of ...
2
votes
1answer
136 views

How to wire ground when the sub-panel is Plug-On Neutral

I need to install a sub-panel in my home. Both the main panel and the sub panel are in the same building. I purchased a Square D Homeline Indoor Plug-On Neutral panel (Model # HOM2040M100PCVP) for ...
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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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3answers
2k views

Is it legal to wire a bath fan using load from top of GFI outlet?

Purchased a place and we are re-wiring the bathroom and putting in a standing shower. The bathroom is quite small so there is just enough room for this. There is a dedicated circuit, a round box above ...