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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350 views

Can I ground a new light to an old metal box via a switch yoke?

All of my switches are installed in old metal boxes with no threaded ground screw holes. The boxes are wired using old cloth BX with no ground wire(grounded via casing). Some of the BX wire ...
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183 views

Why showing bad ground on my detached garage?

Everything has to be conduit by code. When i use my stop shock tester everything in the house shows no problems which is two wired. However, when those wires run from the panel box to the detached ...
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91 views

Power on disconnected ground wire

Last week I've put lights in the garden. There was already a wire coming out from a switch in the house so it was an easy job. Since there is a door at the other end of the garden I though it would be ...
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1k views

Could a loose ground wire cause an AFCI breaker to trip every 3-4 days?

I have a circuit connected to an AFCI breaker circuit breaker, which is running into our upstairs bonus room as well as upstairs guest room area. I changed out an outlet in one of the boxes, and ...
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0answers
72 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 ...
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2answers
160 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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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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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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0answers
213 views

Has this light earthed itself?

After accidentally earthing the live wire going to the outside light whilst putting a faceplate back on (patched up now), the light has stopped working. I've just been out with a multimeter to see if ...
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1answer
716 views

How can I connect the wire that goes to the grounding rod to the grounding electrode system? [duplicate]

I'm trying to install an outdoor antenna at my parent's house and was wondering how to connect the wire that goes to the grounding rod to the grounding electrode system through the service panel when ...
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1answer
545 views

Integrating into knob-and-tube wiring: okay to borrow a ground [duplicate]

I have a mixture of knob-and-tube and NM-B. If I'm extending from knob and tube, but I have a (different) an NM-B circuit nearby, is it technically allowable to ground via ground wire in the other ...
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1answer
349 views

Anything wrong with this ground wire? Is it supposed to be insulated?

Panel is from the late 1970's. Looks like there was some insulation on the ground wire, but most of it has come off. It's the same way through the crawlspace.
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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
42k views

Is my circuit breaker box grounded? If not, can it be?

I recently bought a house that was built in 1960. During the inspection, I was told that the majority of outlets weren't grounded. However, it appears a few are such as in the bathroom. How do I ...
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5answers
237 views

Can I connect the ground pin of the wall socket to neutral?

I have leaking currents issues in my apartment. There are some appliances in the apartment that don't have a problem with a wall socket that doesn't have a ground; like, TV, mobile charger, laptop ...
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3answers
8k views

Grounding a receptacle when there is no ground wire?

I am replacing old receptacles with new tamper-proof ones. I opened one in my basement and realized it wasn't currently grounded, the electrical housing is a real mess and has a copper "ground" wire ...
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1answer
529 views

What type and gauge ground wire do I need when using 1/0 hot and neutral wires

I have a 260 ft run from my main 225A panel to a 100A subpanel in a steel shop out in my yard. I have a #4 bare copper wire grounded to the rebar in the foundation of the shop. Not knowing what I ...
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3answers
552 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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3answers
425 views

Ungrounded GFCI Outlet with 3 pronged connection

I have a GFCI outlet on top of my pergola outside that had solid 3-conductor wire ran from there to an outlet on the other side of my patio when my parents built the house. My Mom wants me to put ...
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1answer
260 views

Does 5V DC power supply require Ground wire?

I got this 5V DC 8A power supply for some 5V LED strips. For the AC input connections it has Line, Neutral, and Ground (numbers 1, 2, and 3 in attached image). My question: For the 120V AC input is ...
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3answers
43 views

verify if the Ground cable is connected to Neutral cable

I want to verify if electricity outlet is grounded. For this I did a test using a bulb connecting it to Phase and Neutral and it lit (to verify if bulb works). Then connected with Phase and Ground and ...
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2answers
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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1answer
30 views

Is this smart plug safe? only 2 pins

I would like to use the TP-link HS110 to control my plant grow lights and monitor the energy usage. I have chosen this model specifically as it has many raspberry pi compatible hacks to avoid using ...
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4answers
962 views

How is a a two phase, three wire, grounding plug such as a NEMA 6-20P safe to use?

I'm looking to use a piece of commercial equipment in my home, and I've been reading about AC current and circuits. I currently have access to an old style non grounding 10-30 style plug, which I ...
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3answers
303 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
77 views

Ground Bus Bar on Sub Panel

I was working on a house with a sub panel for a shed/workshop. The sub panel was fed off the house main panel via 2pole 50A breaker. The sub was a load center type with no main breaker. The neutral ...
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1answer
181 views

Should I connect the ground wire to the panel when the conduit is grounded?

I ran 10/3 BX cable to my attached garage for an outlet. The BX has its own green wire for grounding, but since my home is grounded all through the conduit/outlet boxes and is bonded to the neutral in ...
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2answers
331 views

Can I strip a neutral wire and use it to pigtail ground wires?

I need to ground outlets in my house and need to pigtail the ground wires. Just wondering if I can salvage the old neutral wires, strip them, and use them to pigtail to the outlet instead of cutting ...
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3answers
176 views

Confusion while diagnosing an open ground

I have an outlet tester and it says the outlet in my bathroom has an open ground and I'm trying to see if I can fix this by replacing the receptacle or if the problem is elsewhere. With a voltage ...
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2answers
627 views

Does the metal receptacle box for 6-30 NEMA need to be grounded?

I have a 240 VAC portable heater with a 6-30 NEMA-style plug. I am finishing the 3rd floor of our house. I installed a sub panel fed with a 50A service using 6 AWG THHN. Installed a 30-amp 2-pole ...
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2answers
478 views

3 hots, 3 neutrals, 3 grounds; so confused

We have a 78' rancher here in Texas we just moved into and just replaced all the power receptacles/ outlets. So of them were tricky some of them were straight forward, the room was split up into two ...
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4answers
116 views

Equipment ground

I am helping family with finishing and upgrading the service to a separate garage 30ft from the house. Currently, there is 12-2 NM w/ground on a 20 amp breaker cord-capped and plugged in to a ...
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1answer
105 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
421 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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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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2answers
12k views

Installing a fixture with no ground, no ceiling box

I recently bought some nice track lighting to brighten a room who's only light source was buried in a corner. I removed the old fixture and found (to my horror) this: Two wires, no ground, no box (...
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2answers
64k views

Is ceiling fan missing grounding wire from the ceiling box, and is this safe?

I recently had a contractor/handyman install a Hunter ceiling fan for me. It worked great, but my wife came home and thought it was too big. I ordered a different Hunter fan, and figured I could ...
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1answer
106 views

How critical is it to use the correct wire colors within the same electrical outlet?

I am replacing "razor only" receptacles to GFCI. The outlet contains a LINE cable (black, white, bare copper). The previous receptacle of course did not use three prongs, so the ground was just ...
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3answers
100 views

Grounding Requirements for same structure subpanel

I understand that unless a 250.32(B) (NEC 2014) applies, a separate ground wire should run from the main to a subpanel where the service is in a separate structure. Still confused however about NEC ...
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2answers
70 views

Can I ground a ceiling fan to another electrical ceiling box nearby?

I want to install a ceiling fan where a ceiling light currently exists in my garage. The box for the current light has only two wires coming in however: a black & a white (no ground - looks like ...
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2answers
212 views

EMT Grounding requirements

I'am running 2" EMT from an outside enclosure through the exterior wall into a switch room that is being attached with beam clamps, The EMT is carrying a Fiber optic cable feed to the switch room that ...
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2answers
75 views

GFCI Grounding Issue

I'm trying to replace a two prong outlet in my garage with a GFCI. The receptacle line is fed from a light switch on the wall, and the load runs to an outdoor(one bulb) lamp post. The general ...
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1answer
210 views

Using the existing neutral as a PE grounding conductor on a NEMA 10-30 outlet

I was redirected here from the electric engineering exchange with a more specific question out of this earlier post: https://electronics.stackexchange.com/questions/340136/is-it-possible-to-run-an-...
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2answers
114 views

Is it personal preference or code to connect grounding wires and neutrals to separate buses?

In my main panel all neutral wires are connected to one bar and all ground wires are connected to another bar. is this just a personal preference or the proper way to do the job.
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2answers
2k views

Grounding metal building power panel

I have a question about grounding. The scenario is my shop has a concrete floor with metal framing and siding. The panel is mounted to the wall via struts. A #2 Al ground wire is ran from the meter to ...
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2answers
149 views

make ground 4 gauge wire from several twisted 12 gauge solid copper wires

Can I make a 10 foot long single 4 gauge grounding wire from several twisted 12 gauge solid copper wires?
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1answer
690 views

Do I need a permit to ground an outlet?

At the moment, I have a receptacle that has no ground but is using three prongs. I plan on fixing this by installing a ground screw in the electrical box and routing a copper wire from that to the ...
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2answers
631 views

How can I add a ground wire?

I have this metal electrical box that has no ground wire. I was thinking that I could buy a ground screw and screw that into the side of the box. There's a wooden frame on all sides. Afterwards, I ...
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2answers
776 views

Can I ground my new exhaust fan to the metal box where there is no grounded conductor?

Can I add a green ground screen to my exhaust fan's housing (metal) and connect the green ground wire to it? There is no ground wire in the old supply wiring.
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1answer
141 views

Receving 120 and 220 volt readings when testing a home outlet

I recently redid a room in my house (older home built in the 60's i believe). I decided to replace the outlets as well as they where loose and wouldn't hold plugs very well. When i pulled a few of the ...