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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39 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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177 views

Converting Nema 10-50 receptacle for car charging

I might be buying an electric car soon and i was wondering if I could use my current nema 10-50 dryer plug for my 240v evse? The plug is not used since I have a gas dryer. The receptacle was ...
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272 views

Bridging Neutral and ground in a Light Switch

I changed my bathroom light switch for a Occupancy Sensor Switch but it would not turn off. Since the package said Ground Wire Required I figured it was a ground issue. The location has wiring from ...
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77 views

What tests can I perform to figure out if a wire is my Grounding Electrode Conductor?

As part of some investigation into the systems of the house I live in, I was looking at the grounding and bonding wiring for the house, as most of it is accessible from the basement utility room. In ...
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2answers
58 views

Shared ground for 3 circuits

My septic system requires 3 circuits. A 10Amp & 2 20Amps. Using schedule 40 conduit in a 80ft run underground to the 3 pole emergency service disconnect. Can these three circuits share a ground? ...
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53 views

Intersystem grounding bus ran out of terminals; now what?

My intersystem grounding terminal bus is out of available terminals, and I have two additional communication wires to ground to it. Does NEC allow supplementary bus bars? NEC 250.94 seems to imply no, ...
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50 views

Does a ground need to be install in a 2' x 4' outside junction box?

i have a bunch of outdoors 2' x 4' open bottom concrete junction boxes. the question is, does each box need to have a ground rod installed and bonded to the ground wire? if so can someone please point ...
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1answer
335 views

Trying to install Kasa smart switch but having trouble with ground wire

I started to install my KASA smart switch but when I opened the unit I wasn't able to find a ground wire. I currently have two black wires (one stabbed into the switch and the other is wrapped around ...
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2answers
84 views

Do I need to install a local ground point for a secondary consumer unit in my shed?

I've just installed outdoor sockets on the side of my brick shed, where previously we just had a double socket inside the shed itself. The original socket in the shed is on a spur from the ring main ...
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1answer
57 views

how to replace surface conduit for a two-wire lighting circuit?

I have an old house with unswitched knob-and-tube running to a ceiling fixture. Previous owners ran surface conduit to a wall switch and to a second light fixture over the sink; none of this was ...
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1answer
81 views

Is it OK to have a redundant path to earth?

I have a home with separate flat on the grounds. Our system, in South Africa, has 230V live and neutral, supplied by the national grid operator through a distribution board, via isolator. It then ...
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83 views

Can you run earth ground thru conduit into home?

I have a detached garage that I am running coax and cat6 to. Running pvc conduit underground from house to garage. My question is when the conduit comes up out of the ground and into a 1 gang pvc box ...
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84 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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90 views

How to check grounding connection

Background: in my neighborhood the water company is renewing the pipe line, taking away the old metal pipes and replacing them with plastic pipes. The electrical network company has thus sent a letter ...
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2answers
91 views

Can I use a bonding terminal on ground wire between ufer rod and panel

Long story short, I need to replace an electrical panel. In my the new panel the grounding bar is in a different location than the current panel. The ground wire from the Ufer rod will not reach to ...
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300 views

Adding ground to replacement sub panel

We recently purchased a new home that has a 16 x 30 steel building in the back yard approximately 100ft from the main panel. The building has power run to it off a 60 amp breaker in the main panel. ...
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1answer
2k views

Use 3 prong microwave on 2 wire ungrounded outlet?

I have a dedicated, ungrounded 15A outlet. Can I use a microwave with a 3 prong plug on it if I install an AFCI/GFCI combo outlet? Or do I need to also ground the outlet? The microwave owners manual ...
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788 views

Grounding Light Switch

I've been changing out the light switches in my house. None of them have been grounded even though there is a ground wire present. What would be the proper way to ground the new switches to the ...
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886 views

Is there any way to do an Ufer (concrete-encased) ground with a monolithic slab that has a vapor barrier?

If I understand correctly, when using a monolithic slab (where the footers and slab are poured as one piece), the vapor barrier is installed under the slab and the footers. The NEC does not consider ...
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474 views

Can ground wire be downsized mid run?

I'm planning on running some schedule 80 PVC conduit in my garage to add extra outlets. At the same time I want to ground the 2 post rack I have in my garage. A few related questions that appear ...
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1answer
2k views

Ground wire with 1/2 EMT Conduit

Do I need to run a ground wire with conduit? I have installed a line of lights using 1/2 EMT and tied into another circuit that is grounded coming off the panel. There are about 7 lights in a ...
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2k views

adding a ground wire to a 2-wire breaker panel

I am trying to run new ground wires from outlets in the house into my breaker panel that handles an old 2-wire system. There is only one panel after the meter that has the main cutoff, the various ...
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1answer
403 views

Grounding a dryer

I have 4 prong dryer outlet that the previous owner wired up with 10 ga 3 conductor wire. He wired it "correctly" with a red, what, and black conductors. The ground terminal isn't connected to ...
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1answer
2k views

How can I tell if an appliance is grounded?

We're doing some kitchen remodeling in our 100-year-old home and came across some very sketchy wiring hidden in the soffit. There is never any current running through the junction, and because there ...
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75 views

Replacing switches and outlets

We painted our first floor and the outlets are all brown so I wanted to replace them and the switches with white ones. In doing so I was taking a ground wire off the old outlet and it snapped off of ...
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55 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.
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193 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 ...
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1answer
359 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 ...
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1answer
972 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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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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41 views

Stacked dryer washer grounding

I got a 10/3 wire for my Dryer/Washer stacked. There is a Ground attached to the Dryer/Washer. Can I attache the ground wire from my 10/3 directly to the ground on my Dryer/Washer?
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852 views

Where does the C wire connect in a dual transformer system?

When wiring a common ground (C wire) for a dual transformer system, does it matter which transformer you connect the ground too? I'd assume that the ground on either transformer would serve as a ...
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1answer
2k views

How do I make ground connections at my receptacle boxes?

I searched for my question but could not find the answers. I had the inspector out for my rough in on electrical inspection. He said I did a very nice job but I need to make all my grounds at all my ...
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2k views

Can I use conduit to ground an antenna?

I have an HD antenna mounted to a storage shed, not even as high as the house roof. It's close to where the electrical service enters the house. There's no ground rod in sight. (House built in 1971.) ...
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912 views

Can having a bad grounding situation destroy a circuit breaker?

We moved into a home, built a while ago. there are wires hanging and covered in black tape on a chimney. I bought 2 sconces and put them in place. i did not hook up the ground wire on one of them, ...
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7k views

How should I ground a GFCI to a metal box?

I've replaced some old GFCI receptacles in my kitchen, which live in metal electrical boxes. The old GFCIs did not have grounding conductors attached, but it seems that the boxes themselves are ...
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1answer
244 views

Is this a ground wire in my ceiling light canopy?

I just installed a ceiling light fixture, which has a feature I've never seen before. The fixture has the traditional white, black, and green wires. I attached the white and black fixture wires to the ...
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30 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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65 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
29 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
138 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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1answer
93 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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66 views

Dishwasher chassis outputting an AC voltage

I've recently noticed that touching the metal interior of my dishwasher gives me a slight tingling. I put that (stupidly) to static electricity. For "fun" I then decided to touch a finger on the ...
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52 views

Can armored cable cross over a drain pipe?

My electrical system uses the armored cable sheathing as a ground path. I was placing some lines of AC in my walls, and I uncovered a drain pipe in the way. At first, I covered the AC with ...
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56 views

How to correctly ground long distance from main disconnect to first panel

I've got a property with an existing very sluggish electrical installation which consists of a service drop at property entrance, no main disconnect and a 130' underground run to the living space (...
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47 views

Will improved panel grounding resolve AM radio static?

I live in a manufactured house. I have two electrical panels--one outside on the electrical pole where the electrical meter is at and another one in a utility room in the house. The one on the pole ...
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2answers
192 views

Grounding Rod for Residential application

I currently live in Florida, where the soil is basically sand and clay. My question is: how should my grounding rod for my house be installed? I've managed to dig up the grounding rod that was ...
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38 views

NEMA 14 with integral JB — how can I ground it to EMT?

There are two general styles of NEMA 14 receptacle in wide use -- one is the conventionally yoked style that is used with a separate junction box in flush mount applications, but can also be used in a ...
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101 views

Could a missing ground connection in a light box disable other fixtures?

I replaced an existing outside light fixture with these security lights. I properly connected the wires together (including ground). After installing I was reading the install instructions a bit ...
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349 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 ...