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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13 views

Broken underground ground wire

I have underground three-strand #4 aluminum insulated from my service meter to my shop approx 500 ft. At the shop panel the volt meter with no load on either line across the lines 240V plus and from ...
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Does my pergola need to be grounded?

I’ve had a deck and pergola constructed and the pergola is constructed from steel 5 X 5 poles, 4 I-beams and 2 X 2 square tubes for the top. It’s about 700 sq ft. My question is: Does it need to be ...
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53 views

Replacement GFCI isn't working correctly

I have a bathroom outlet where the GFCI is going bad and needs replacement. There is one line and 2 cables coming in for 2 loads so there are 3 black wires, 3 white wires, and 3 ground wires coming ...
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Is it ok to have mixed grounds and neutrals on bars in a breaker box?

So to continue my line of electrical questioning (and perhaps narrow down my flickering light problem), I took a look through the two panels in this house. There is a 200amp main service in the ...
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1answer
33 views

Gronding requirements for standby generator

I'm installing a standby generator for my son's new home build and have questions about grounding, bonding the genset. We are installing a Kohler RXT 200 amp transfer switch between the meter base ...
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1answer
62 views

Campground sub panel grounding question

I’m involved in maintaining a small campground. Some areas are served by overhead electric and an underground services. No ground wire was ever ran or pulled from the main breaker panels. Individual ...
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0answers
52 views

How to reroute grounding system to a grounding rod?

I'm building a ham radio room and need to ground my coaxial cable and antenna. If you are not a radio ham, you might not understand but it does not matter. All the resouces I can find online tells me ...
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2answers
64 views

Sub panel grounding conductor “splicing” with main panel grounding conductor at electrode

I've looked through the sections in the Nec on grounding conductors how they can splice and placement and attachment of electrodes . I'm installing a meter socket disconnect combo making my main load ...
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64 views

Intersystem bonding terminal - how direct?

Back before I knew what an intersystem bonding terminal (IBT) was properly called, I had my service entrance put in by an electrician, licensed in 3 states, who never-the-less pulled things I now know ...
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1answer
200 views

Oven has 2-prong plug plus earth wire. Socket is modern 3-prong. How to connect?

My 110V toaster oven has a 2-prong cable. Also, the oven's chassis has a screw with a connected green/yellow earth wire, which I want to ground. My wall socket is a modern 3-prong with earth and all. ...
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71 views

Can I use #12 ground wire as jumper when the other wire in the box is #14?

If everything is wired with 14 gauge romex on a 15 amp breaker, can I use 12 gauge ground as a jumper inside a box? This would be to either ground the box itself or as jumper between to outlets.
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1answer
57 views

What should I do with the ground wire from my light fixture when there's no ground in the box?

The ceiling light/fan I want to install has a short GREEN wire. It looks ready to be twisted onto another wire. There is NO ground (bare copper or another green wire) coming out of the ceiling box. ...
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4answers
11k views

How to tell if light switch box is grounded

I'm attempting to install a smart light switch in an existing light switch box. There's isn't a ground wire I can see, nor does my voltage detector light up when I touch one end to hot and the other ...
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5answers
14k views

Orange Outlets Near Breaker Box

I haven't noticed these over the years I've owned my home. Only recently I happened to look down and think "huh, that's odd, why are those outlets colored bright orange." I have, over the years, ...
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1answer
134 views

Connect two grounding rods

I added an exterior TV antenna and a grounding rod next to it with a 6 gauge copper wire going to both the antenna mast and the ground on the coax coming from the antenna. It is about 15 feet from ...
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44 views

Update on outbuilding grounding requirements

This isn't really a question, rather a correction to something I posted earlier. The main building with the primary service requires it's own grounding system (of course) with the neutral bonded to ...
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1answer
57 views

What is the best practice for grounding a shielded cat 7 ethernet cable?

I'm in the process of ducting the aforementioned cable through a conduit that I've "trenched" between my house and my office which is in an outbuilding 30m away. Since buying the cable and starting ...
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1answer
56 views

What would be a good way to run a ground from the existing grounded circuit to the new power outlet from another circuit?

So after asking around here I was told that it is OK to run a ground wire from an existing near by power outlet (on a different circuit) to a new power outlet. The layout is below. The garage circuit(...
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2answers
149 views

Replacing 2 wire switch with 4 wire switch, box has 3 wires. Help?

I’m trying to replace a light switch that has 2(Red & Black) wires directly connected to the switch itself with a 3rd(White) wire that’s capped off in the box with a new smart switch that has 4(...
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1answer
47 views

Can you splice a #10 bare copper ground with a irreversible crmp?

Can you extend a #10 bare copper ground with a irreversible crimp? and could you run it through 1" PVC conduit? What codes will back up either way. I know you cant have a splice in a location that you ...
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2answers
40k 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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1answer
47 views

Can I retrofit ground to a two wire outlet from a nearby grounded outlet? [duplicate]

This is in my garage. I am trying to add a second circuit in order to be able to run the dust collector and the table saw at the same time. I did run them on the existing circuit with no load and the ...
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1answer
42 views

Ecuador grounding an ungrounded house

Hi so I’m an electrical engineer visiting some family in Ecuador and after some wiring has stopped working In the kitchen I have decided to rip out the 40 plus year old installation and reinstall. ...
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1answer
158 views

Square D QOC 12 125: Is it possible to bring this subpanel up to code?

I opened up this subpanel for the first time because when I opened the walls for contractors to install floor drains, I found a circuit with four splices that were any/all of: not enclosed in ...
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3answers
74 views

Is an ungrounded outlet for a gas stove a safety hazard?

House was built in the 50's and there is a 3 prong outlet but no ground wire. I've tested it best of my knowledge, the metal casing is not ground either. 2 black and white wires. Basically, am I ...
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12k views

Are directTV dishes energized in some way?

Are directTV dishes usually energized in some way? I was recently at my grandmothers house installing an over the air digital tv antenna. I decided to use the same coax cable that originally ran to ...
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1answer
215 views

How urgent is it to resolve two-prong problems?

I have read How do I use three-prong appliances when my outlets are mostly two-prong?. I have recently moved into a house that has some two-prong and some three-prong outlets. The place in the ...
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2answers
193 views

How should a sub panel be grounded if next to the main breaker?

How should a sub-panel be grounded if next to the main breaker? Do the ground and neutral need to be isolated (separated) from each other in the sub? Sub-panel will be about 6 - 8 feet away from the ...
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3answers
284 views

How to test voltage between neutral and ground

I'm not an electrician. Per, https://www.apc.com/us/en/faqs/FA158817/, I want to test the outlets in a room for the following: Overloaded neutral wire (>5 Volts AC measured between Neutral and ...
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3answers
4k 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
110 views

Can my lug and breaker insert be rotated 180 degrees

I recently posted a question about my panel, Cutler Hammer CH30E, being properly grounded. All ground wires were twisted together and stuck in two lugs screwed into the left side of the panel. This ...
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1answer
76 views

Do retrofit ground wires need to be run in conduit?

I'm moving my water heater to another corner of the room it is in, to allow for more usable space in the room. However, the grounding wire is only 14 ga instead of the required 10, and it's not in the ...
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3answers
157k views

How do I properly ground my subpanel that only has one neutral/ground bar?

I am adding a sub panel in an unattached building. My sub panel has the connection for the 2 hot wires coming from the source panel (a 40 amp double breaker) In addition it has one neutral/ground bar ...
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1answer
146 views

Understanding ground to earth and neutral, trying to make my home safe

I've been reading for hours and still confused in regards to my situation. I'm trying to improve electrical safety in my house, especially with a growing family. Any help would be great. I'm in ...
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1answer
31 views

Voltage on ground wire of LED light, changes when dimmed?

Why would there be a voltage on the ground wire of an LED light, that varies according to how the dimmer is set? When at full brightness, the ground wire reads ~30VAC, when it is mostly dimmed, it ...
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3answers
56 views

Grounding TV Antenna and Metal Porch, And Resolving Ground Rod Issues

I'm mounting a light-weight metal TV antenna to a metal mast attached to old-school metal roof columns (with the curly-cues) on a small second floor porch which has a metal porch roof, and metal floor ...
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51 views

Adding ground…“bare armored ground”: suggestions

I have a 1940's house. Modern panel and sub panel feeding cloth clad cable and knob and tube. Very hard to access crawl space or inside wall because wood ship lap over skip sheathing, shingles over ...
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1answer
95 views

Grounding metal electrical boxes

I would like confirmation on the following: Is any metal box automatically grounded if it is supplied by an armored cable (without a ground wire) that is properly connected to the box and back to the ...
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0answers
69 views

Attaching a ground wire to a prong that plugs into an outlet adapter

The outlet shown in the image below doesn't have a ground wire connecting to its receptacle. A friend of mine is helping me setup a ups that requires ground wire, however what he did was run a ground ...
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1answer
854 views

What's the deal with this ground wire?

I recently purchased a home that was built in 1963 and have started changing out a few light fixtures. I have come across a wiring method I have never seen before where the ground wires are attached ...
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1answer
35 views

Antenna Ground/Attic

I have mounted a Clearstream Antenna in my attic of a single story home, which is connected to my tv's via cable. Should I ground it and if so how? Can I run a Copper wire from the splitter to the ...
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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
99 views

Can I use the ground wire as a neutral for an outlet?

I had a bulb light outlet, and I decided to convert it to power outlet. Now when I took the bulb light off, I discovered that there is only two wires in the wall, brown and yellow green, so I assume ...
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3answers
2k views

How did my ground and neutral become energized by a short in the buried main line?

Long post, because I'm not sure what information is critical. The ultimate question is what, if anything, I need to do to ensure there are no hazardous conditions in my home. Friday night, the ...
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2answers
72 views

Do multiple ground bus bars need to be tied on subpanel?

I'm adding circuits to a subpanel. For wiring neatness sake, I'm considering adding a second ground bus bar. Do I need to tie both ground bars together (if so, what size wire), or is screwing them ...
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1answer
90 views

New Circuit Faceless AFCI tripping with no load

Most AFCI questions here revolve around existing circuits, and AFCI Circuit breakers, but my situation is a little different. Here's the details: Renovation to add a half bath and laundry room in ...
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4answers
88 views

Can you have neutrals on ground bar only bonded through main panel body

I have just added a circuit to my main panel and saw something I wanted clarification on. For reference, my main panel is a Homeline 30 space panel with 2 extra grounding bars on the sides. Picture ...
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2answers
774 views

Replacing bathroom exhaust fan without ground

I'm replacing a bathroom exhaust fan. The previous fan is probably about 30 years old and was not grounded. In fact, the wiring in the bathroom does not have ground. The fan will be mounted to a steel ...
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3answers
106 views

How to stop current originating from common ground wire?

A building has all the apartments' electric panels connected to a common ground wire. Theoretical situation: 1. one of the building's electric panels has its differential circuit breaker broken 2. it ...
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2answers
111 views

Does an existing unprotected conductor need to be immediately rewired?

While cleaning up under the sink, I noticed that an existing owner wired the disposal outlet as shown: It has a red conductor traveling into the crawlspace without a plastic or metallic sheath. I ...

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