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.

Filter by
Sorted by
Tagged with
3
votes
2answers
173 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 ...
0
votes
1answer
167 views

Input voltage drop to 190v after switching over load

We have an Online-UPS connected as per the diagram. The output is given to a change-over switch. So If we want to feed the computers direct AC we switch it to Source O (Top) for bypass and if we ...
0
votes
2answers
6k 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 -...
2
votes
2answers
798 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 ...
0
votes
1answer
120 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 ...
1
vote
4answers
1k 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 ...
0
votes
1answer
51 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. ...
2
votes
3answers
1k 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 ...
7
votes
4answers
2k 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 ...
0
votes
2answers
2k 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 ...
1
vote
3answers
556 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?
0
votes
2answers
3k 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 ...
1
vote
2answers
293 views

Ungrounded outlet indicates grounded when an UPS is plugged in

I moved into an old apartment that has a mix of grounded, ungrounded, and GFCI ungrounded outlets. My computer is plugged into an ungrounded GFCI outlet. Plugging in a tester indicates open ground. ...
1
vote
0answers
70 views

Shared ground between two different circuits? [duplicate]

I have a 240 circuit that i am trying to split into 2 120 circuits. I have only 3 wires available, red/white/black. I have another circuit a few inches away (both in junction boxes), Can I share ...
5
votes
3answers
6k 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 ...
2
votes
3answers
809 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 ...
0
votes
3answers
2k 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 ...
0
votes
3answers
119 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.
0
votes
2answers
131 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" ...
1
vote
1answer
54 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.
0
votes
1answer
100 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 ...
2
votes
1answer
309 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
votes
1answer
607 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 ...
2
votes
2answers
698 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
votes
1answer
781 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?
0
votes
2answers
79 views

Installing a light designed to be hard wired as a corded light- what happens to the ground?

I have a pendant light (single bulb) that used to be hard-wired in my previous house. I would like to install it in a closet as a plug in light (with an in-line switch). The fixture has a ground wire ...
0
votes
3answers
529 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 ...
0
votes
1answer
62 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 ...
1
vote
1answer
190 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 ...
1
vote
2answers
154 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 ...
2
votes
1answer
196 views

what size ground wire should i buy?

I am trying to connect my house to the current meter pole that is 300 feet away I am going to buy 250kcmil for the load conductors. I know that I can save some money by buying a smaller size ground ...
1
vote
1answer
227 views

Why can't I put a load between hot and the ground line? [duplicate]

Normally the load goes between hot and neutral line. Since neutral is grounded why can't I put a load between hot and the ground line?
1
vote
1answer
350 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 ...
2
votes
3answers
559 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 ...
0
votes
2answers
12k views

Ground wire sparking

I have a metal junction box with a main feed. If the ground wires touch the metal box the breaker pops and the ground wires spark. The main feed comes out of a ceiling light fixture box. The ceiling ...
0
votes
2answers
1k views

I have a 2 prong outlet and a surge protector

so I have just bought all the parts for a new PC, but am weary to build and use it because I noticed I don't have a grounded outlet at all in my room/house. I have been using a computer on this outlet ...
1
vote
1answer
941 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 ...
1
vote
1answer
602 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
votes
1answer
915 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
2k 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 ...
2
votes
4answers
4k 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 ...
0
votes
1answer
71 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 ...
0
votes
1answer
398 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 ...
1
vote
3answers
2k 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 ...
1
vote
2answers
850 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 ...
3
votes
1answer
3k 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 ...
1
vote
1answer
110 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 ...
1
vote
1answer
1k 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?
2
votes
2answers
4k 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
votes
2answers
136 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 don'...