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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3answers
66 views

Ground a dryer converting to a 3-prong cord - manufacturer hardware missing

I need to change the cord on an electric dryer from 4-prong to 3-prong. My questions concern 1) what to do with the ground when moving to the 3-prong dryer and 2) how to test whether the installation ...
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1answer
44 views

Is grounding the subpanel not required some times

Is the sub panel properly grounded, only Load and Neutral wiring were located at the sub panel as shown below. This Sub panel is at a single floor Condo, built 1970, Updated with Newer Electrical ...
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3answers
42k views

Does an extension cord from 2 to 3 prongs have any benefits?

If you're plugging a device with a 2-prong plug into an extension cord that has 3 prongs on the other end, does that give it the grounding benefit of the third prong?
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1answer
32 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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1answer
2k views

Use 60Amp disconnect as a pass-through to another disconnect

We would like to add a second air-conditioning unit. The original 60 Amp disconnect is grounded via EMT to the panel. The existing EMT will meet code requirements for both conduit fill and derating ...
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1answer
66 views

Running wire for new subpanel in garage, how to best utilize existing wiring considering the scope of my project?

I have a 200amp main panel in my home, and my garage has a subpanel fed by a two pole 50amp breaker by approximately 85' of 6/3 plus ground cable. I use my garage as a workshop, greenhouse, and office....
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1answer
42 views

Lighting fixture: 2 live, 2 neutral, no ground - Is is okay to have the 2nd neutral used as a ground?

I live in Germany and I have just moved into a new apartment and started to change the light fixtures, but I ran into confusion. Wires coming out of the ceiling are - two black & two white (no ...
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1answer
100 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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1answer
35 views

Daisy chaining ungrounded LED, what do with last ground wire?

I’m daisy chaining 4 LEDs that aren’t grounded and was wondering what to do with the last ground wire. For the first 3 LEDs, I connected the grounds with a wire nut (see picture). What should I do ...
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3answers
82 views

Ground wire arcing in breaker box

While inspecting the breaker box in my shop area I noticed inside the breaker box was a ground wire that was loose inside the box. The other circuits had grounds connected to the neutral bar. Upon ...
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1answer
47 views

Can neutral be used instead of ground for a tankless water heater?

A friend wants to install a tankless water heater under the kitchen sink for faster hot water and plans to use a 40A circuit near the sink that is meant for an electric range. The house was built in ...
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2answers
59 views

Is the ground resistance meter indispensable when grounding your home?

I'm Brazilian and I need to ground my house, especially because of some expensive equipment I don't want to use without proper protection. By "grounding my house" I mean: provide an alternative path ...
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1answer
2k 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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4answers
1k views

If my heat pump does not have a neutral, do I still need a neutral wire?

I had a friend wire 10-3 line for a new heat pump. He connected the red and black conductor wires in the house to the 2-pole 60 amp breaker and the neutral white to the neutral bus bar. The outdoor ...
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1answer
46 views

Is it sufficient to ground to a box using the NM clamp?

Is it NEC compliant to wrap the ground wire from a 14-2 around the sheathing and then clamp it using the NM clamp in a metal junction box? I live in a house built in the 60s and I see that a lot but ...
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6answers
47k views

Grounding requirements for main panel and subpanel

I recently had my main service professionally upgraded to 200A and had a 60A subpanel installed in my master suite to support future additions. All work passed city inspection, for whatever that's ...
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2answers
132 views

Using a Leviton GFCI self grounding outlet on 1950s house with metal boxes that might or might not be grounded

My house (1950s) currently has a bunch of 2 prong outlets or un-grounded 3 prong outlets. I was told in order to be up to code all un-grounded 3 prong outlets need to switched to GCFI outlets. Or If I ...
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0answers
52 views

How do I manage grounding when installing a metal extension on a plastic box?

I've been repairing an outlet that's not supposed to be recessed, but is, so I purchased a box extension from the local hardware store. When I tried to put it in, I realized it interferes with the ...
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0answers
36 views

Grounding wire attached to ceiling lamp but canopy of light fixture not grounded, is this serious problem?

I've just installed a new metal pendant light. The light itself has a metal canopy and there is a metal bulb holder below, the two parts are connected via insulated wire. The light came with a ...
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2answers
58 views

Metal Junction Box screwed to wood - same screw used for grounding

My brother has a metal pancake box directly screwed into a 2x4. That same screw used to fasten the box is also being used to ground the box. i.e metal pancake box screwed into the wood also has the ...
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2answers
38 views

Old house, no Neutral coming from APS pole. Neutral vs Ground

I'm installing some 110v Mini Split Air conditioners and want them on a separate breaker. The Main Panel only has 2 HOT wires coming in from the Mail Pole. The neutral wire is connected to the Ground ...
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1answer
45 views

Paid an Electrician to install Sub-panel.. & Ground wire question

A couple of years ago, I was needing a sub-panel in my garage. While I intended to do it myself, shoulder surgery precluded me from being able so I hired a local, licensed electrician. He did a ...
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4answers
14k views

2 prong to 3 prong outlet help

I don't know too much about replacing outlets, only what I've read online or through YouTube videos. The house was built in the early 50s. Some outlets have been replaced (brand new kitchen) but some ...
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2answers
50 views

Receptical Box located In bottom kicthen cabinet

We have a receptacle Box located in a bottom kitchen cabinet on the back wall with 1 white, 1 red, and 1 black wite. No ground. I wanted to add a plug to it and then took a closer look at what I was ...
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2answers
1k 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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1answer
47 views

How to ground private 2/0 aerial triplex from meter to garage

Where to ground aerial 2/0 triplex bare neutral at the meter/pole. Can I connect directly to power company strand/neutral? Or connect to mast (customer equipment)?
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3answers
114 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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1answer
27 views

Turning on light fixture trips GFCI on a different circuit

When I turn on the light fixture in the bathroom, the GFCI in the bedroom trips and cuts the power in both places. The bathroom and bedroom are on two different circuits, controlled by two separate ...
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1answer
51 views

Electrical sub panel grounding

I am concerned about improper / unsafe condition(s) that I noted at the house’ s electrical sub panel. House that was built in mid-late 1960’. The main panel and the sub panel are older, likely when ...
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1answer
58 views

Ground wire blew off new light fixture

I bought a new single-bulb light fixture. It's going in a small animal cage, so the wall plug comes in through the ceiling of the cage. I connected white to white, black to black, and green to a green ...
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2answers
66 views

Grounding in main panel without visible ground wire or ground bar

I am exploring a way to install an outdoor outlet out of my main electrical panel but I couldn’t find any visible ground bar(s) that the ground wires (in green color) can connect to, nor do I see a ...
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0answers
18 views

Light fixture with no mounting bracket

I'm changing a light fixture that has no mounting bracket and the ground runs to a nut and bolt. The old light fixture bracket won't work cause the new light fixture won't cover it up. Where do I ...
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2answers
46 views

Extending ground from one circuit to another

One of my circuits has a compromised ground wire, by something along the route of its cable ( like a nail or something ) so it's not grounding properly. If it has only one receptacle ( dishwasher + ...
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0answers
37 views

Do I need to ground my off-grid house inverter?

I'm building a battery box for my off-grid house, consisting of a 155AH AGM sealed battery, Krieger 1100-watt inverter and a Samlex SEC-1230UL 30A battery charger for using my generator to charge the ...
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1answer
29 views

Electical Outets with Bootleg ground

I replaced a couple of broken outlets that had a “bootleg ground “ on them. Most posts say it’s dangerous to have bootleg ground. Older home, no ground, no metal, no metal sheathing on wires. ...
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1answer
76 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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2answers
16 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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0answers
49 views

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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1answer
55 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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5answers
340k views

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
39 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
68 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
54 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
69 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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2answers
72 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
214 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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2answers
73 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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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
149 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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