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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5k views

How to connect a 3 wire plug to a 2 wire outlet?

Bought a vent fan that came with 3 wires, but homes here are only 2 wires (not sure which but no ground). What to do with the extra neutral wire? Should i cut it or twist it with the other two??
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126 views

How to connect a detached garage and house electrical panel at the meter?

The meter is in between my house and the garage. Can I connect the service conductors from both panels to the same lugs at the meter? Do I handle both panels grounding and neutral bars as 'mains'? ...
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3k 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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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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3answers
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European Light Fixture in the US - Does it require a ground connection to light up

A bit of an oddball question. We bought, through a US distributor, a ceiling light fixture that was made in Europe (Netherlands). It is a metal fixture, connected to the ceiling via a metal chain, ...
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281 views

Can an inspector require a specific grounding technique?

I had been taking classes to become an electrician at one of the bigger community colleges in my area (specifically LBCC) and my brother had been doing some renovation on his own home and asked me to ...
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3answers
2k views

Grounding an old 2-Wire system in my bathroom

I have been remodeling my bathroom in an old house with a 2 wire electrical system without conduit. It had a 2 prong outlet at the lower wall that I've replaced with a new standard 3 prong. Also I'...
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1answer
188 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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1answer
511 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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10k views

Dangers of connecting ground to neutral?

In my living situation, there is no ground wire at the building. There is a ground AND neutral bus in the breaker box, but it doesn't extend to this separate building, which I'm living in. I've got ...
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2answers
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Is it safe to substitute a 10-gauge wire for ground strap on dryer?

I am backfitting a dryer with a 3-prong plug. The manual says to connect the body to the neutral terminal using a copper ground strap. I don't have a ground strap and none of the stores around carry ...
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434 views

Anything wrong with this ground wire? Is it supposed to be insulated?

Panel is from the late 1970's. Looks like there was some insulation on the ground wire, but most of it has come off. It's the same way through the crawlspace.
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What would cause arcing between equipment connected to each other where power is connected to different circuits?

Scenario In my "datacenter" (read: basement), I've got a rack of various computer and A/V equipment plugged into a UPS, and into a standard 120v outlet on one side of the room. This equipment works ...
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260 views

What did cable installer use to tap onto my service ground?

I have a somewhat mysterious service ground apparently underneath a concrete entryway. All that is visible now is a heavy gauge bare copper wire coming through the cement. When the cable company ...
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3answers
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Using receptacle mounting screws for ground connection

I will soon be adding some outdoor wiring using weatherproof metal boxes and EMT conduit. I noticed when I was playing around with a multimeter that without a ground conductor between a receptacle and ...
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1answer
281 views

Grounding subpanels located ~100ft from main breaker

Based on this question on EGCs in conduit (in the context of branch circuits) and this question on conduit as a sole ground source, I would like to know whether two subpanels, located ~100ft from the ...
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292 views

Does 5V DC power supply require Ground wire?

I got this 5V DC 8A power supply for some 5V LED strips. For the AC input connections it has Line, Neutral, and Ground (numbers 1, 2, and 3 in attached image). My question: For the 120V AC input is ...
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1answer
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Adding second ground rod. Is this an acceptable way of bonding?

I recently found out that our sole ground rod is only 4 feet long. That said, I want to add a properly-sized ground rod to "improve" the grounding system and hopefully comply properly with the ...
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1answer
329 views

Attaching a grounding pigtail to a junction without a tapped hole?

I'm trying to ground an outlet in my home to the metal of the junction box. I'm using a grounding pigtail of 14AWG wire with a 10/32 terminal attached to one end. Unfortunately it seems the metal ...
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2answers
9k views

Converting a Samsung Dryer from a 4-prong cord to a 3-prong cord?

I just bought my first home and I need to replace my 4-prong cord on my dryer to a 3-prong. I've removed the four prong and now I see this: I know how to hook up the three prong, I'm just unsure ...
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2answers
2k views

How can I tell if my two-pronged outlets have ground wires behind them?

I have two-pronged outlets in my apartment. They look like this: Is there a way to check whether they have a ground or not? Some guides talk about use a circuit tester and touching the screw, but I ...
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1answer
1k 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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Why am I getting shocked by a water heater?

Background: I live in Metro Manila, Philippines where the electric distribution company, Meralco, delivers split-phase power to residential buildings. Our old (1980s) Meralco service drop consists ...
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1answer
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Can I use a busbar as a ground in my travel trailer?

I need to ground my inverter and a few other items from my fuse box. Can I use a single busbar, mounted to the floor, as a ground. If not, can you offer suggestions?
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198 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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763 views

Do I need a permit to ground an outlet?

At the moment, I have a receptacle that has no ground but is using three prongs. I plan on fixing this by installing a ground screw in the electrical box and routing a copper wire from that to the ...
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651 views

Outlet with ground wire attached to socket ground and neutral

I am replacing some sockets with new sockets, that also contain USB charging receptacles. I have done this before. The question I have is with one of my outlets in my rec room (built in 2007, ...
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51 views

Some of our electonics are being fried

Would having the ground from a 277/480 panel hooked up to the ground of a 120/240 panel have the potential of causing problems, such as fried electronics?
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How is a a two phase, three wire, grounding plug such as a NEMA 6-20P safe to use?

I'm looking to use a piece of commercial equipment in my home, and I've been reading about AC current and circuits. I currently have access to an old style non grounding 10-30 style plug, which I ...
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2answers
971 views

How can I add a ground wire?

I have this metal electrical box that has no ground wire. I was thinking that I could buy a ground screw and screw that into the side of the box. There's a wooden frame on all sides. Afterwards, I ...
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2answers
781 views

How to run ground, for electric supplied by generator and batteries through a inverter

I have a panel that is powered from the generator, it runs my major appliances. One of the circuits feeds my inverter/charger , which charges my batteries. A 2nd. panel receives power from the ...
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3answers
7k views

How to check if my house is properly grounded?

I live in an very very old house, recently I purchase a surge protector (APC P5B-GR) and it came with "grounded" light indicator, when I plug the surge protector into my house wall outlet, the ...
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How do I/can I install a dimmer without a ground?

Full disclosure: I know very little about electrical work and was hoping for an easy fix. I have been getting a buzzing from my dimmer every time the dim feature is used, and I read that a low ...
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101 views

grounding wires overkill

I have been replacing some light fixture recently and haven't seen any info on connecting grounds wire together with a wire nut when a)one has been grounded to the green screw on the plate and the ...
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467 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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3answers
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Safe way to remove paint from ground wire?

I'm addressing an item on our house's inspection report where a GFCI outlet had been ungrounded. I turned off power at the breaker box, popped the outlet cover off and found the ground wire neatly ...
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2answers
277 views

How to connect a 230V jointer to a pre 1996 dryer circuit?

I would like to connect a jointer to my dryer receptacle but I am concerned about proper grounding. The jointer draws 8.5 amps at 230V and has a NEMA 6-15 plug. The dryer is plugged into a pre-1996 ...
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475 views

Buzzing on laptop, stove and other electrical devices in Canary Islands

I have a friend who has moved to the Canary Islands (Spain) for a while. She has told me that there is a buzzing that she feels when she touches many of the electrical devices. I noted something ...
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39k views

No Ground Wires - Can I connect a wire to the metal box for ground?

I want to install new z-wave light switches that require a ground, but it appears that none of the electrical boxes in my house have ground wires and the previous light switches didn't use a ground. ...
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3k views

Add grounding to a 9th floor apartment in country with no electric code at all

I live in a 9th floor 1940s-era apartment in a country with no electrical code and no professional licensing for electricians. My 'electrician,' such as he is, is a security guard who does wiring on ...
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4answers
2k 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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1answer
73 views

House and shop on separate meters, will water line between the 2 be a problem?

Since my utility pole is halfway between my house and pole building (shop), there is a meter at each service entry. My (house and shop) panels are grounded properly with ground rods and subpanels are ...
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180 views

Replacing light switch with dimmer - can't identify wire colours; no ground

I'm trying to do a straight replacement of a single pole light switch from a regular rocker switch to a dimmer. I pulled the old switch out of the box and found the following: two wires coming out ...
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328 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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1answer
1k views

Generator RCD trips after startup

We currently have a renewable power system (solar, hydro and wind sources charging a 48v DC battery bank) connected to an inverter, which in turn supplies 230V power to a house. Due to the lack of ...
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Had ground rod connection added to my electric panel, should old ground to copper water pipe be disconnected?

My 1970 house with slab foundation originally had a connection to the copper water line as the only ground. I had a pair of ground rods 6' 6" apart added and would like to disconnect the ground to the ...
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79 views

Chandelier wiring

I'm building a hanging light wither with multiple hanging bulbs. Basically, I'm wrapping and hanging 10 medium base , cloth cords around a 6x6x6 beam. On top of the beam I have them connecting to two ...
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45 views

verify if the Ground cable is connected to Neutral cable

I want to verify if electricity outlet is grounded. For this I did a test using a bulb connecting it to Phase and Neutral and it lit (to verify if bulb works). Then connected with Phase and Ground and ...
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2answers
305 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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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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