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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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
302 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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939 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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352 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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4answers
83 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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3answers
172 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
442 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
109 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 ...
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1answer
279 views

No ground wire, no box (old or new) trying to install light fixture

I just removed an INCREDIBLY old and ugly Hollywood light fixture from my bathroom. The wall now looks like the picture below. I bought a box and a Snap Tite connector. I even got a hold of some ...
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80 views

Are Ideal Greenie 30-192P Ground Wire Nuts approved for use with stranded wire?

I looked at page 4 of the UL document here: http://www.idealindustries.ca/media/pdfs/products/ideal_ul_listed_combinations.pdf And I notice that it says you can use up to 4 #12 wires. However, it ...
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3answers
14k views

Light Switch with no ground

I’m replacing my light switches with Lutron Caseta switches. When I pull the old ones out I noticed they don’t have grounds. The box they are in is plastic. Is it okay to not ha e a ground in the new ...
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1answer
1k 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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3answers
4k views

Outlet tester shows “bad ground”

I have a brand new Square D sub-panel installed in my barn that replaced an old panel that had been there for many years and was deemed a fire hazard by the inspector. The new panel has a grounding ...
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2answers
1k views

Grounding fault - stray voltage on bath faucet

2 months ago I moved into a house from 1959 (1 220V phase and 1 neutral coming in). I noticed on the 2nd floor bathroom that there was stray voltage on the faucet (-+ 30V). No socket outlets in the ...
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2answers
476 views

Is the ground wire connection grounding all switches in this box?

I am installing a Z-wave switch (I have done others), but this one is different. There are three switches in this junction box. However, only one switch is grounded (not one I am installing), and ...
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1answer
806 views

Master showerhead has electrical current, what to do?

Good morning, I purchased a home last month and have been in the process of updating/renovating. My first night in the home was Saturday night. I went to take a shower, turned the water on and got in....
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1answer
2k views

Ground wires crimped in copper sleeves in switch box?

I had to move a two-gang switch box to a new location on my wall. This meant disassembling everything, moving the box, and reassembling it as I found it. The only thing that seems a bit sketchy is ...
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1answer
111 views

How do I rewire this electrical panel?

House was built in 50s or 60s, and there was a bundle of wires all grounded to the main ground lug. I removed them and began to separate to disperse them along the ground bar, and three of them are ...
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3answers
814 views

Adding a ground to a GFCI ungrounded outlet box

I have bought a 1974 built Condo that had GFCI issues. A bathroom has a GFCI outlet and no ground wire attached. It has a red/white wire hook-up that functions properly. There is a metal box, ...
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1answer
226 views

Question about this DIY light fixture and grounding

http://www.mysimplysimple.com/lighting-diy-office/ I was looking into the above light fixture project, and I noticed that it has no ground wire. Most of the videos I have looked into about replacing ...
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1answer
24k views

What to do with ground wire when installing ceiling fan on ungrounded branch circuit

I removed an old ceiling fan and I am replacing it with a new one. My home was built in the 60s and I'm installing so it works off one switch. After the removing the old fan the ceiling revealed ...
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4answers
954 views

Should data ground wires be attached to plumbing?

I have ground wires attached to copper plumbing on the house side of the dielectric coupling. The telephone service box has a ground wire which I found attached to copper plumbing. The satellite ...
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1answer
26 views

Installing a new smart switch into box, wanting to double check plan (primarily with regards to ground wires)

I'm looking to install a new smart switch into a 3 gang box. The current box has 3 toggle switches, each of which is without connection to a ground wire. The box itself has 5 sets of wires coming into ...
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1answer
63 views

How do I connect light fixture’s ground to supply wires?

Location: US While not exactly a novice in regards to electrical, I’m a little confused here. Replacing ceiling fan+light combo controlled by two switches with light fixture (removing one switch/...
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1answer
67 views

Can I use the grounding rods of a main panel as the grounding rods for my sub panel

I ran 3 #6 B/R/W and 1 #8 Grn from my main panel through 1" sch 40 PVC to my garage and will be installing a 100A sub panel with separate ground and neutral blocks. I understand that since it is a ...
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1answer
94 views

60 amp sub panel, 100 ft away from main panel. Grounding rod or not?

Adding a 60amp sub panel (4breakers) on the 2nd floor for a dehumidification system and some misc. Running 100 feet of 6/3 wire. I am assuming that I can use the ground wire in the 6/3 from that ...
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1answer
105 views

How do I connect the ground wires to the new light fixture?

Took out old fluorescent fixture and putting in new LED one. There are 2 switches for this fixture. Not sure what’s going on with the 3 ground wires. I’m not an electrician so dumb it down please.😊
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2answers
99 views

Would connecting an ungrounded cable to a new grounded cable in a box violate code?

A wire in my garage got damaged. Breaker is off now. The wire feeds the stove on the other side of a split level home. It is an old cloth covered wire, with no ground. Red, white, and black wires only....
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1answer
2k views

Main Panel with separated neutral and ground

A customer of mine had a friend wire his basement. He did a neat job, but when I opened up the mailnpanel to add a circuit, I noticed he had installed ground bars and separated them from the neutral ...
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1answer
437 views

Is a Redundant Ground at Sub-Panel Permitted? Useful?

I've searched the forum and haven't found an answer for this exact situation. Here's the configuration: Main 200A service panel at one end of house (exterior), and 100A sub panel at opposite end of ...
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2answers
2k views

Outlet tester results for open ground on mixed circuit

I have a US house built in 1958 that has been remodeled in many stages over the years. I recently tested a circuit that included ungrounded outlets in the old part of the house. A number of years ago, ...
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2answers
241 views

Electrical outlet installed by previous owner had Black and Green wires wired together

I've replaced dozens of outlets in my life without incident. This time, when I pulled the outlet away from the box, I found something odd. The white (neutral) wire was as it should be. But, you know ...
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3answers
60 views

Grounding rods and testing

I'm looking to install a couple of vertical grounding rods for a friend's property in the middle of nowhere (very country - The earth is mostly clay, rocks and sandstone) From the limited research I'...
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1answer
71 views

Need help identifying ground screw

I am installing a chandelier and there is no ground wire in the metal junction box, but there is a screw with a copper wire already running to it. The wire runs up through the box. Is this the ground ...
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1answer
2k views

Ground Wire (or Wires) after PEX Installation

I recently had my galvanized pipes professionally replaced and now think I have an issue. Previously, The ground wire that ran from my electrical panel used the galvanized pipe as the "conduit" to ...
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1answer
2k views

old home. no ground wire

I'm in the process of making my home a "smart" home. The new outlets are not a problem as they merely plug into existing outlets. The switches, however are something different. They require a ground ...
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2answers
551 views

Can I ground junction box directly to panel?

I have a metal junction box but I'm currently using as a pass-thru for the wires running through it. It's the incoming box from outdoor underground conduit burial. My ground wire is just barely long ...
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1answer
171 views

Adding Ground Conductor from Service to Upgraded Sub-Panel

Upgrading electrical system with new 200 amp (main disconnect) service panel then underground 110 feet to house and a new 200 amp sub-panel. There is a 3 wire feed of 4/0 Au in 2" PVC conduit (with ...
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3answers
184 views

Unusual wiring in receptacle connected to switch

I have a receptacle with a wiring configuration I am not familiar with (see picture). The receptacle is controlled by a single pole switch elsewhere in the room. The two black wires are pig-tailed ...
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2answers
297 views

Electrical wiring/grounding - continuity via metal junction box?

Question about grounding in a metal junction box. I have a 4x4 steel junction box, with 4 cables coming into it. 1 cable comes in from the main panel, 3 separate cables go out to 3 separate ...
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2answers
251 views

Confusing result on three-light outlet tester

I have a switched outlet which, when turned on, reads as correctly wired on one of the three-light plug-in testers. When turned off, however, I get it weakly lighting as "hot and ground reversed". I ...
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1answer
454 views

Subpanel or not? Neutral and ground bonded?

How do I fix the AC unit to be connected properly to its circuit? How should the AC Unit/Garage/Subpanel be setup? Maybe I can separate the neutral and ground, then ground by connecting to the garage ...
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1answer
2k views

How can I safely connect a subpanel in a detached garage to the main with a 3-wire connection?

This weekend I attempted to install a breaker box into a pre-wired garage. The previous owners took the breaker box with them when they moved, and since I have installed quite a few subpanels, it ...
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1answer
226 views

How can I best salvage my 240V GFCI spa disconnect wiring?

Based on the answer to my recent question "How to wire a 240V disconnect panel for spa that does not require neutral", I need to run another wire from my main service panel to my spa disconnect panel ...
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1answer
180 views

Can a grounding rod be connected to service neutral only?

My grounding rod is connected to the service neutral at the weatherhead where it enters the house. Should it not be connected to the ground bar in the 200A breaker panel?
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95 views

Grounding subpanel to box - 'tap threads'

I've installed a subpanel and need to ground the grounding bar to the actual panel box. I was instructed to run a #6 jumper to a hole on the box, attach with a screw, making sure to 'tap threads'. ...
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2answers
455 views

Where do I attach the earth conductor on a plastic fixture?

I'm replacing some outdoor lights. The old ones were metal, and the earth wire was connected to a screw on the base. The new fixtures are plastic, and there's no earthing screw. Where should I connect ...
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1answer
301 views

A ground rod where a drain needs to go

My house sits on a hill, and the gutters don't properly drain. As a result, I'm digging a new drain along the side of the house to re-route the water. However, while digging the drain, I came upon a ...