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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180 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
15 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
520 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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1answer
44 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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5answers
6k 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
25 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
251 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
108 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
37 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
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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1answer
53 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
29 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
56 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
32 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
84 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
71 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
37 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
133 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
17k 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
135 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
43 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
57 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 ...
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4answers
5k 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 ...
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1answer
53 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
77 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 ...
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1answer
113 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 ...
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3answers
610 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 ...
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4answers
10k 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
61 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
84 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 ...
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2answers
119 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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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
68 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 ...
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4answers
440 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
53 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 ...
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1answer
108 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
7k 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 ...
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1answer
6k 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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2answers
57 views

Should light fixture with outlet be grounded to metal box?

I'm replacing an old ceiling light with chain with a light with outlet attachment in a grounded metal box. Do I need to ground the fixture since I have a 3 prong outlet, or since box is grounded I ...
2
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2answers
70 views

Can I put 15 amp switches on 12 gauge wire

We're finishing our basement and doing the electrical ourselves. We have a bathroom that we ran 20 amps to, 12 gauge wire, but we only have a few lights in there. The lights definitely won't be using ...
0
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2answers
163 views

No ground wire connected to the 3-way switch

I am no expert in electrical stuff as i have never done it before. We recently moved into a new house and i don't really like the look of the old switches. I was looking around them and i noticed the ...
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2answers
686 views

subpanel ground requirement - attached vs unattached structure - what difference does it make?

Subpanel in the garage is currently fed by 10-2 w/ground romex and is grounded both at the main panel via the ground wire and to the plumbing next to the subpanel (underground iron pipe). I want to ...
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1answer
48 views

Why do I get an open ground warning after a GFCI Test?

I just finished a home wiring project which has a set of outlets protected by a GFCI outlet. I was testing them with an outlet tester and noticed something odd: Immediately after a GFCI test, my ...
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2answers
58 views

Can induction in parallel ungrounded cables lead to false continuity readings with a multimeter?

I have two old circuits with no ground wires in which cables run parallel to each other for 20 feet or so. I had both circuits powered off today and was testing some things for unrelated reasons when ...
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4answers
166 views

Looking for or adding a ground to an existing NEMA 10-30 socket

I have an unused older 3-wire dryer socket (NEMA 10-30R) in my garage, I would like to upgrade this to a NEMA 14-30 socket with an separate ground. I'll be using this for an EVSE unit for electrical ...
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1answer
2k 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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3answers
135 views

Checking light switch for grounding problems

I have a light switch in my building that frequently gives me a "shock" when I push it. The shock seems to come from the two mounting screws. It has a photoelectric sensor that turns the light off ...
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2answers
147 views

When are copper pipes a ground?

There is an exposed copper wire attached to the cold-water pipe near the dryer plug in my house. It's not attached to anything and I'm wondering when it would be useful if at all? This wire just ...