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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117 views

Grounding a switch that has no ground screw or wire

I have a timer switch (see photo 1) that has No Grounding Screw and ** No Grounding Wire** protruding from it. It is to be installed into a plastic gang box and replace a switch which is currently ...
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1answer
113 views

Grounding to the box and 3 Prong Receptacles

Recently bought a flip house. The flippers replaced every two prong receptacle with a three prong and a bootleg ground. In the process of undoing that unsafe practice, I've discovered that almost all ...
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2answers
269 views

Off Grid PV System Grounding Question

Hi I am installing an off grid solar system form my orchard and shed. Basically there are some pumps, lightning and some household appliances like refrigerator etc. I have read many articles about ...
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1answer
112 views

Safest way of temporarily working with a failed 4-wire outbuilding subpanel (one missing hot leg, neutral bonded ground on both ends)?

This is actually a multi-pronged question. I will ask it all and split out what I can as needed. I am renting a remote out building in a rather rustic location on a farm. The power situation here was ...
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1answer
83 views

How to track down a ground failure

Several times, I felt some tingling when using my 30 year old grounded sawzall. Brand is Milwaukee. I thought that was odd since it has a grounded cord, plus I was wearing hiking shoes with thick ...
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1answer
322 views

Does the NEC permit brazing for connections to ground electrodes?

I need to connect several copper-clad ground rods together with AWG 6 solid copper wire for lightning protection, and as part of the electrical service grounding. I also need to connect some 2.5" ...
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1answer
410 views

How to ground a junction box extension when using a non-metallic box?

I have a water heater that gets electricity from a dryer cord plugged into an outlet on the wall. I need to remove the outlet and replace it with permanent wiring and some form of quick disconnect. ...
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1answer
52 views

Grounding a 2 gang metal box in a wet area

In my pool area, I have a metal box that has 2 switches (spa air and pool light). Each switch has a green screw and the box itself has 2 green screws. There is also ground coming into the box. How are ...
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2answers
2k views

Should outdoor deck gazebos or grills be grounded?

We recently put up a put up a gazebo on the deck of our condo unit to provide some much needed shade. The gazebo is 10'x12' and the deck is 12'x16'. The frame is light gauge hollow steel thats powder-...
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1answer
81 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
369 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
119 views

Can I connect the grounding conductor to the neutral when installing a remote for a ceiling fan in an ungrounded box?

I would like to install an in-wall remote control for a ceiling fan. The remote is wired up with two black wires (in and out) and a ground wire. It controls the fan's functions via wireless signal. ...
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2answers
4k views

Suitability of flexible metallic conduit serving as ground

EDIT: The attached photo is the most easily accessible example of the conduit used in the entire house. This shows the conduit attached to the garbage disposal with the previously mentioned 3/4 set ...
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1answer
446 views

How do I properly ground a light fixture?

I installed a light fixture in my bathroom and need help grounding it properly. The previous fixture wasn't grounded. When I removed the fixture, there were two wires, one black and one white, from ...
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5answers
4k views

How to solve a miswiring of neutral and ground

An Outlet in the dining room which had a microwave plugged into it stopped working. I found 120+ volts from hot to ground and 96+ from hot to neutral. Also at one point my "three light tester" showed ...
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1answer
993 views

What do I do with the ground wire?

I just bought a wall timer to replace a three-way switch. The wall timer comes with three wires, one for the common screw wire, and the other two are for the travelers, with no place for a ground wire....
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2answers
14k views

Can I extend the ground/bus bar in a main service to accomodate subpanel equipment ground?

I am about to replace the main service breaker panel in my house. The old panel (a 200amp Siemens 40-circuit) had bus bars that extended the entire vertical length of the box. The new panel I would ...
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1answer
1k views

Potential wall socket fault

I'm remodeling a room and sorting up a rat's nest of questionable electrical practices... boxes hiding in the wall, wall fixtures being used to branch circuits, etc. At this point, all of the hard ...
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1answer
101 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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0answers
68 views

Bathtub pump motor - ineffective ground through water pipe?

I opened up the space underneath my bathtub for the first time in this house. The tub is a "spa" style and has a pump motor to circulate water through jets. (I'm in NY / USA). I noticed that the ...
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0answers
121 views

Wanting to make existing 2-wire 220V outlet a 4-wire one

(Located in the USA) I've inherited a 220V (or 240V?) circuit which is just capped off inside a junction box. It's hooked up to a 30A breaker, and seems fine, except that it's only a 3-wire run--no ...
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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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3answers
2k views

Can I ground my workbench using an unused outlet's neutral?

I haven't found any advice on my specific predicament, so I'll ask here. First, some background. I just moved into a house with old electrical wiring (read: ungrounded outlets). Unfortunately, the ...
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3answers
567 views

Is is safe to only use a gfci with no ground wires downstream?

If you use a GFCI outlet and the rest of the outlets downstream don't have a ground wire attached, are they still considered grounded and are they safe?
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3answers
482 views

How to mark an outlet as ungrounded

I'll be replacing my ungrounded three-prong outlets with tamper-proof GFCI outlets in my home in the USA. Maybe I'm overthinking this, but is there a way to 'universally' mark the outlets as ...
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1answer
227 views

Why can't I put a load between hot and the ground line? [duplicate]

Normally the load goes between hot and neutral line. Since neutral is grounded why can't I put a load between hot and the ground line?
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4answers
1k views

What are the risks of sending low-current neutral through the ground wire?

I have an existing switch that controls an outlet. I'd like to replace it with a smart-home switch, which requires a neutral wire to power the switch itself. However, there is no neutral wire at the ...
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3answers
160 views

Are these my ground wires?

So I'm replacing a ceiling fixture and my new fixture has a ground wire but the old one didn't. My outlet box has two places where wires come in - one with a black, white, and bare and the other with ...
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1answer
1k views

Why does my Dewalt power drill only have a 2 prong plug? [duplicate]

Why does my Dewalt power drill only have a 2 pin plug rather than a 3 pin with a ground?
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2answers
233 views

Practical advice needed on house with no earth/ground

I've just bought a 4th floor apartment in an old (1820) building in Spain. Neither my apartment, nor the building as a whole, has any earth circuit. I'm looking for practical, technical advice on ...
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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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2answers
177 views

Would my grounding conductor be “choked” out by metallic conduit?

I’m in Hawaii. The G.C./engineers have told previous electricians that they want the bare ground coming up through slabs to building steel to be in a short piece of rigid conduit for protection of the ...
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1answer
8k views

Is earthing required for a submersible water pump?

I have a submersible water pump with a power cable that ends with a three-pronged plug with a protective neutral contact. Having a matching outlet is problematic - there are only unearthed outlets at ...
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2answers
167 views

One hand in the sink and one hand on the stove, I feel a tingle. How dangerous and how to fix? (Not my home)

I was staying with a friend recently and after cooking dinner I was washing up. I had water running in the sink, and one hand in the water rinsing a glass. With my other hand I reached to grab a ...
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1answer
611 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
60 views

What should I do about no ground wire

I bought a new bath fan for my old house(1920s). Where the fan is installed, there is a power/black, and a neutral, but no ground wire to connect to it. It's old knob and tube wiring. Is no ground ...
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2answers
161 views

Does a non grounded GFCI meet code?

Background So I live in Michigan (which of course affects code) and I have a bunch of two prong outlets in a house that I own. If I want to convert these to be 3 prong outlets is it still up to code ...
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3answers
4k views

How do you add a separate ground back to panel on 2 wire ungrounded outlet?

This post mentions that it is now legal to add a separate wire to ground an outlet. What is the proper way to do this? Does the wire need to follow the same path as the ungrounded 2 wire path? How ...
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2answers
262 views

Ungrounded Desktop PC; Workaround to Remove Static Charge?

Background I'm in China (hot, dry area) for the summer and am a guest in an old (1980s**) single family home. Because I am working all summer, I brought my desktop HP computer with me. After ...
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2answers
200 views

What is the functional difference between using a ground wire, and grounding to a fixture?

Is one method better than the other? How so? In the possible event that one has both options at their disposal, which one should they choose? An example where you would have both options at your ...
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3answers
213 views

Why is there a live and a neutral in a wall connector?

I get the ground. Since you can plug the plug in either way there is no way for the appliance to know what's in what wire, right?
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3answers
10k views

Existing 3 wire service feed to sub panel: bonding grounded neutral and ground bars?

I know variations of this question have been asked (the closest I could find is here), but I'm still confused. @Tester101 explained if the existing feed to the subpanel is 3 wire with a grounded ...
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4answers
1k views

Which wire is the ground in this light box?

So I'm trying to fit a new light fixture that's got the usual black, white, and copper/green wires coming out from the light itself. However, when I took off the old light and looked at the wires in ...
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2answers
296 views

Ungrounded outlet indicates grounded when an UPS is plugged in

I moved into an old apartment that has a mix of grounded, ungrounded, and GFCI ungrounded outlets. My computer is plugged into an ungrounded GFCI outlet. Plugging in a tester indicates open ground. ...
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2answers
878 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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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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2answers
346 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 ...
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3answers
131 views

Can you attach more than one wire in a given hole on a bus in an electrical panel?

Is it permissible to attach more than one neutral or ground wire to any terminal screw on the service panel bus? A home inspector says this is not allowed. THAT DOESN'T SEEM RIGHT, because all of ...
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1answer
384 views

Does the UFER Ground require to be visible?

Is there something on the NEC code that states the UFER ground needs to be permanently visible? I had my rough in electrical inspection the other day. He stated that per NEC 250.64(E) (1), I have to ...
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2answers
80 views

Dryer connection changes from 10-3 with ground to 10-3 without ground

The previous homeowner did some electrical work to upgrade the dryer outlet to a 4-prong receptacle along with new 10-3 wiring. It was all brand new and looked copacetic. I'm thinking of moving the ...