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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13k 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 ...
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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 ...
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974 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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638 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
955 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
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 ...
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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 ...
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1answer
73 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
420 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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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 ...
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2answers
938 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
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 ...
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1answer
111 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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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?
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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 ...
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137 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'...
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2answers
7k 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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1answer
2k 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
110 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
5k 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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3answers
6k 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
2k views

What is the risk of leaving a well pump on a 3-wire system?

A home inspector noted that well pump and septic were incorrectly grounded with a 3 wire system using the neutral wire for grounding. What is the risk of leaving "as is" vs installing a 4 wire system ...
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3answers
3k 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 ...
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2answers
3k views

Is having cloth touching a grounding wire ok?

In my basement, the ceiling of one of the closets is the copper grounding wire that runs from the breaker box to my water main. This wraps around the perimeter of the basement on the top of the rooms ...
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1answer
6k views

3 black wires and 3 white wires

I am currently trying to install a light fixture and I'm really confused, I've never seen wiring like this before and I'm not sure what goes where. There are 6 wires in total, 3 black and 3 white. 2 ...
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4answers
10k 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
147 views

Electric Guitar at an outdoor show - Grounding issues? [closed]

I play electric guitar and today I had an experience where the guitar would give very slight tingling sensations - I wouldn't quite call any of them a bad shock because none of them really hurt badly, ...
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1answer
2k views

How can I safely connect a subpanel in a detached garage to the main with a 3-wire connection?

This weekend I attempted to install a breaker box into a pre-wired garage. The previous owners took the breaker box with them when they moved, and since I have installed quite a few subpanels, it ...
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1answer
226 views

How can I best salvage my 240V GFCI spa disconnect wiring?

Based on the answer to my recent question "How to wire a 240V disconnect panel for spa that does not require neutral", I need to run another wire from my main service panel to my spa disconnect panel ...
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1answer
40 views

Should I connect the ground in the outlet for the dryer and the panel?

the ground wire for the dryer is not connected at the panel, or at the outlet. Is this correct or do, or do I need to land the ground wire at the panel and land ground wire to the actual dryer plug ...
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1answer
513 views

Is this panel ground rod correct?

I ran a 50 amp sub-panel to an outbuilding 120' from the main source panel with a four wire SOOW cable. I put the cable in an 1-1/2" conduit 2' deep. I connected the neutral to the neutral buss bar in ...
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1answer
31 views

Grounding switches

If a metal receptacle has 2+ switches but they are all on the same circuit, is it necessary to ground the receptacle to each one (or ground each one to the receptacle) or is it enough to just ground ...
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3answers
2k views

Does a neutral-to-ground voltage of 0.0 indicate a bootleg ground?

As described here (for example), in a correctly-wired receptacle, there will be a small potential difference between the neutral and ground wires that increases slightly with increasing load. I'm ...
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2answers
37k views

Is an explicit ground wire required through steel conduit?

We just bought a Chicago-area house and found that there's no ground wire in some of the recently re-wired areas. I thought that the national electrical code requires a ground wire for new ...
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3answers
814 views

Adding a ground to a GFCI ungrounded outlet box

I have bought a 1974 built Condo that had GFCI issues. A bathroom has a GFCI outlet and no ground wire attached. It has a red/white wire hook-up that functions properly. There is a metal box, ...
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1answer
212 views

Are receptacles protected when downstream from ungrounded GFCI?

I have an ungrounded circuit in my house with three-wire grounded receptacles. If I install a GFCI, will the downstream receptacles be protected even if the GFCI is ungrounded?
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438 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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2answers
1k views

What if I can not connect the ground wire of my new light fixture to an old electrical connection?

I am replacing a bathroom medicine cabinet that has a light fixture attached. The old light fixture only had white and black wires. The new light fixture has white, black, and a copper wire. This is a ...
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1answer
554 views

Adding ground to an existing conduit

Continuing my basement shop brainstorming... As I said in another question, the good news is that I've got a 30-amp 240V circuit more or less in the right place and available, and easily accessible ...
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1answer
226 views

Question about this DIY light fixture and grounding

http://www.mysimplysimple.com/lighting-diy-office/ I was looking into the above light fixture project, and I noticed that it has no ground wire. Most of the videos I have looked into about replacing ...
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2answers
519 views

Potential Home Grounding Issue - Illinois

I recently bought a new manufactured home. There are instances where people have touched the front door and received an electric shock. Using a non-contact voltage detector, I confirmed that there ...
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2answers
549 views

Rewiring Garage, building grounds

I'm rewiring my garage from in my opinion is an odd setup. In my house panel (200A split phase) there is a 20A breaker there is a junction somewhere ( I haven't traced it out yet which branches this ...
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2answers
21k 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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0answers
158 views

Are metal face plates safe for metal gang boxes?

So if I understand household wiring correctly: The ground prong is meant to safely conduct stray current (shorts, etc) to the ground. All outlets and switches need to be grounded to the gang box. A ...
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1answer
83 views

Why would the documentation say to wire a pole of the 3-way occupancy switch to ground?

I'm currently wiring up an occupancy sensor to a 3-way switch, I'm leaving one of the mechanical switches in place, and here is the wiring instructions. according to the instructions I need to wire ...
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2answers
899 views

Is water pipe grounding achieved thru pipe or thru water?

I've got a 1901 house, with copper (new) piping. Some of the electrical (old knob and tube circuits) are grounded to the water pipes. The copper pipe goes out to my shutoff valve located outside. so ...
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198 views

Where should I bond neutral to ground? [duplicate]

I have an old house that was remodeled with a bathroom addition added years ago. I have two breaker panels: the outside service entrance panel (A) and another panel in the garage (B). I found bonds ...
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1answer
116 views

Can I temporarily ground an outlet in my home to use a pressure washer outside it?

Can I temporarily ground an outlet by attaching a wire to its central screw and then to a grounding rod situated outside my house? I want to use an electrical pressure washer, but it requires a ...
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2answers
377 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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2answers
352 views

Light sconces tripping circuit breaker

I recently installed two sconces in our kitchen to replace some old halogen lights with LED bulbs. The boxes had three (?!) White wires twisted together, two black wires twisted, and one red. I ...