Questions tagged [ground]

For questions about stuff physically in or on the ground. Questions about electrical grounding and/or bonding should use [grounding] instead.

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11 votes
4 answers
2k views

How do I check if my outlet's ground and neutral are connected correctly?

When we moved to a new house I noticed a strangely wired up outlet: For this outlet, I am really suspicious whether the grounding is messed up and mixed up with the Neutral. Normally Neutral and the ...
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7 votes
2 answers
7k views

Adding second Ground Bus to Square D Sub Panel - Grounded via wire or just the screws?

I have added a sub panel next to my main panel. It is fed from a 100A breaker using 3-3-3-5 CU Service wire. I removed the ground screw to isolate the Neutral and I installed the ground bus that ...
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  • 73
6 votes
1 answer
991 views

Using 10/2 and/or 8/2 for a 240 only 3-prong

I have 2 dedicated circuits: 40 amp water heater 30 amp electric range Both have 2 hots and a neutral grounded at the panel. One runs through a junction box where the wires are connected and ...
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  • 415
5 votes
2 answers
23k views

New Eaton AFCI/GFCI breaker signals (5 blinks) ground fault, but doesn't trip. How to track it down?

Where to start? *We bought a new house on a day's notice, and now I have to sell this 1885 Victorian. I'd like to minimize the scope of a home inspector's report. *The house is mostly the original 2-...
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  • 111
5 votes
2 answers
25k views

Why am I measuring 60v at some outlets?

The house I bought a couple years ago had a couple outlets in a small room in the basement that didn't work. Now I'm troubleshooting them. It's a finished basement so I can't tear down walls. There's ...
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  • 81
4 votes
3 answers
1k views

Plastic shed base - How to level soil?

I am going to get a new shed but first I need the base. I have purchased a plastic grid base system, I have measured out the area and have cleared the turf on top. Now, I am coming a bit stuck on the ...
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4 votes
1 answer
2k views

Old construction, replacing light switch, bundled ground

I am replacing the light switch in my old home (1981). I can see that all grounds are at the back bundled together. Do I still have to legally connect the ground to the light switches' ground screw? ...
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  • 489
4 votes
3 answers
12k views

Ground wire from the junction box

Background: I am a regular DIYer just starting out. My question is regarding the ground wire while installing a chandelier. I have just moved to a new location in Ontario, Canada. The house was built ...
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  • 457
4 votes
1 answer
2k views

8/2 wire for 240v EV charger

I'm new here. I would appreciate any helpful info. I have installed an EV level 2 charger in my garage. It is a 30 AMP charger. I is around 8 feet away from the breaker box. I used 8/2 wire to be on ...
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  • 43
4 votes
2 answers
7k views

200amps service - ground rods instead of pipe connection

I upgraded my main circuit breaker today from 150amps to 200amps. See my previous posts here on the same project: Is RC2040M150CH MSP upgradable to 200amps main circuit breaker Neutral on main ...
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  • 167
4 votes
1 answer
711 views

22kw generator mounting pad on slope

I need to build a pad for a 22kW generator I am installing for my house. The image shows the situation. This generator is quite heavy. I plan to pour a rebar reinforced 6" pad for it. My ...
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  • 1,051
3 votes
4 answers
5k views

Hand tool for packing dirt

What is a good simple hand tool for packing small surfaces of dirt to prepare it for laying concrete? I've seen big pneumatic hammers at large construction sites and was wondering if there is a good ...
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  • 6,643
3 votes
2 answers
843 views

How to I add new light switch with ground wire/screw if old switch had no ground screw?

I have an old light switch that I want to upgrade. The old switch does not have a ground screw (see second image) so the bare copper ground wire is just tied to the metal box with a screw (see "B&...
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  • 33
3 votes
2 answers
1k views

Can I combine ground and neutral wires before they connect to their bus bars?

I finally did my 50 AMP 15-40 Nema wiring. Couple of questions on it. I don't have enough ground and neutral wire to reach the ground bar of the electric panel. Is it ok to join both neutral and ...
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3 votes
3 answers
3k views

Neutral and ground connected to one bus bar in subpanel; should I change?

At my house, there is a subpanel that serves a pool area, served by one 30 amp 240v circuit. The panel, which I think was installed about 30 years ago, has just one bus bar that the neutrals and ...
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  • 191
3 votes
2 answers
18k views

Do metal outlet boxes act as grounds?

Here’s a photo of the inside of a switch I’m replacing. As you can see it has no ground wire, plus it’s got a blue wire instead of the normal black. All the new 3 prong outlets I installed in this ...
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3 votes
2 answers
327 views

New style ground attachment

While reinstalling a switch I noticed that the ground lug is different. It contains a hole just large enough to fit a #14 wire. Wondering what the recommended technique is to use this?
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3 votes
2 answers
141 views

Mysterious ground wire

So I’m trying to replace my old light switches with some nice new dimmers but I have a problem. As you can see in the picture, all the ground wires run up and out of the box to an unknown location. ...
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3 votes
1 answer
916 views

As of the 2014 NEC code do tamper resistant receptacles need to be installed on a GFCI circuit?

Replacing 2 prong with 3 prong. Want to protect the entire circuit with a GFCI. Do the outlets I replace have to be tamper resistant if they are protected by a GFCI?
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  • 59
3 votes
3 answers
374 views

Checking ground current

Background: I had a contractor finishing my basement, and part of that was installing underfloor heating using several heating mats in parallel. It worked initially but soon after it just started ...
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2 votes
3 answers
945 views

4 prong wire outlet, 3 wire dryer - can’t find ground screw

So I’m not entirely sure where to put the ground wire. Do I need to buy a ground screw for that hole? Or is there something else I can attach it to?
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  • 21
2 votes
2 answers
2k views

Properly grounding equipment with a ground screw

I have an NVR that has a power brick and a separate ground screw. What is the "Right way" (read: safest way) to connect this to ground? I've thought of a couple ways to do it. My 4 options are: ...
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  • 1,338
2 votes
2 answers
876 views

How should I replace door chime transformer at breaker panel?

I'm replacing a door chime transformer with a new 16v 30va transformer to accommodate a new Ring doorbell. The existing transformer is attached in our circuit breaker panel through a knock out at the ...
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2 votes
3 answers
21k views

What happens if you don't bond neutral and ground in a main service panel?

I know that we're supposed to bond neutral and ground in the main panel but can't quite understand what the actual danger/problem with this situation is. I also understand why we don't bond neutral ...
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2 votes
1 answer
73 views

How to retrofit this circuit to be able to run a bare ground splice to another appliance?

I'm adding a #8AWG bare ground in order to retrofit a 3-wire range socket into a 4-wire one. I will be splicing into an existing water heater circuit to get the "at least #10" ground that is ...
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  • 103
2 votes
1 answer
106 views

Is this metal box grounded already?

I live in Chicago. I try to replace my single pole light switch to a dimmer light switch. When I open the current light switch , I can't find the ground wire. How should I connect my new dimmer switch'...
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2 votes
2 answers
88 views

Safety differences between the various types of outlet (two-/three-prong, grounded/ungrounded, with/without GFCI)

I am an ordinary person with absolutely no knowledge regarding electricity and how it works (things like circuits and such) and I never really cared before until now when I sense potential safety ...
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2 votes
3 answers
10k views

How to ground a 3 prong outlet in plastic box no green ground wire

I have a 1954 two-story Pacemaker trailer. It's been rewired by somebody but the receptacles are in plastic boxes. Some have ground wires, some do not. PG&E is going to give me a refrigerator, ...
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2 votes
1 answer
653 views

Is THWN wire appropriate for an underground vehicle charging circuit?

We recently purchased a Tesla Model 3 and are planning on adding a 240V NEMA 14-50 outlet in our detached garage to improve charging speeds. Tesla's documentation specifies 6 AWG copper wire with 4 ...
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  • 223
2 votes
2 answers
229 views

Can I touch the metal frame or do I need to ground it?

I live in Eu and I connected the blue - neutral and the brown - hot to the light jack. There is no third ground wire in the cable and i am afraid to touch the black steel frame - is it dangerous, ...
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2 votes
2 answers
3k views

Grounding a 3-prong dryer plug

I just bought a house, and my new washer/dryer is being delivered tomorrow. I have the older style 3-prong 220 outlet, which I know I'm allowed to still use. I also have a 2-prong 110 outlet next to ...
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  • 53
2 votes
1 answer
347 views

3 wire conductor to an electrical subpanel - Can I add a separate conductor for neutral in same conduit?

I'm installing a subpanel to bring power to a garage. Answers to similar questions make it clear that a subpanel must isolate ground from neutral, so the bonding screw will be removed at the subpanel....
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  • 603
2 votes
2 answers
257 views

Will a galvanized tin roof act as a ground for a magnetic rooftop antenna

I just installed a magnetic based antenna on my galvanized tin porch roof. Will the metal roof act as a ground for the antenna? I am unable to attach a ground block to the antenna cable, because the ...
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2 votes
1 answer
100 views

There appears to be no ground - what do I do?

Hi! Trying to change a light switch in my house. I am Chicago within city limits. House is pretty old...it was “gut rehabbed” in the 80s but that doesn’t really mean anything. Actual building been ...
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2 votes
1 answer
185 views

How to ground solar transfer switch

I am installing an off-grid solar system to power some external buildings, but I want an automatic transfer switch so that outlets will be grid powered when the solar batteries are low. Can I run a ...
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2 votes
1 answer
673 views

Can I use an insulated ground wire in a sub-panel?

I'm running a new sub-panel to my basement (the main panel is in the garage). I bought a 500' spool of 6 AWG THHN. The distance to the sub-panel is about 110' so I cut the spool into 4 x 125' lengths. ...
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  • 45
2 votes
0 answers
354 views

Can i connect my solar system to the ground wire of a grid outlet?

I have solar panels on the roof (ungrounded) and an ATS to switch between solar (ungrounded) and grid power. (grounded) EDIT : Sorry, my question wasn't clear enough, I'm talking about AC. My ...
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1 vote
3 answers
17k views

Is there an alternative to buying a tamper to compact the ground?

I plan to build a brick wall, so I need to compact the ground first. The hardware store sells a tool called a tamper, that sells for $60 and only weighs 15 lbs, so it seems inefficient. How is that ...
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  • 897
1 vote
1 answer
11k views

Can a Ground Wire be attatched to a nail in wood stud?

Guilty as assumed: I've installed a thermostat connected to a single electric baseboard. Is it possible to connect the load and line ground wires to a nail which is attached to a wood stud? OR, simply ...
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  • 11
1 vote
2 answers
260 views

Smart dimmer: neutral, ground and copper wire capped together

I called an electrician today to help me install These smart dimmers (Amazon link) in my home. For one of the dimmers, he tied up the neutral and ground wires from the dimmer to the copper ground ...
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  • 11
1 vote
2 answers
165 views

why does a ground rod wire have to be continuous?

my main panel (installed in 1976) has the grounding wire connected to a ¾" water pipe that runs at least 30' underground - no ground rod... I would like to add a ground rod to bring it up to code ...
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  • 19
1 vote
3 answers
170 views

Can the Distance of a Subpanel affect Outlet Tester Results

I got help with wiring my cabin here: Requesting Evaluation of Power Plan at Rural Cabin and here: Cabin Wiring Plan Revisited I also put a follow up comment there, but now I'm not sure that was the ...
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1 vote
1 answer
2k views

How to reattach the "head" of a ground wire?

I just bought a new turntable and receiver When I began using it, I noticed there was a loud buzzing sound coming from it. Looking at the turntable's cables, there are the two Left and Right RCA ...
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1 vote
3 answers
76 views

How can I cut slots in the ground to install insulation panels?

To build a geothermal greenhouse, I need to insulate a thermal mass -- basically the ground directly the greenhouse. The insulation will be for the underground "walls" only, no floor, and 5 ...
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  • 35
1 vote
1 answer
31 views

stiff textile material for simple underbed "drawer"

I have a 90cm x 200cm bed in a corner of my room. I want to use the floor beneath it as storage, but in a way that I do not need to crawl under it to get the stuff in the corner. I have a PVC floor; ...
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  • 167
1 vote
1 answer
776 views

Grounding on switch box

Hi all. Firstly, awesome site - learning so much, thank you all!!!! Mid-80's custom home in Florida. Changing out to some smart switches. Seems no ground in box, best I can tell? Was reading ...
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  • 11
1 vote
3 answers
2k views

Issues with 4 Prong to 3 Prong Conversion

I've really been at a loss trying to figure this out. Quick backstory: GF moved into apartment built prior to NEC code change so it has a 3 prong outlet. Her GE Profile dryer had a 4 prong plug ...
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1 vote
1 answer
2k views

What is the correct wiring (including Ground) for two main load centers plus transfer switch?

I will be building a new house and plan to have 400A electric utility service split into two 200A main load centers. One of those load centers will be tied to a whole house generator via an automatic ...
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  • 185
1 vote
1 answer
1k views

Must the ground wire be continuous from the panel box, through the meter to the grounding rod?

Splitting service to a new power meter. I just cut the wires coming out of the meter box and now the grounding cable is 2' short of the grounding rod. Must the ground wire be continuous from the ...
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  • 11
1 vote
1 answer
656 views

How to run 10 AWG ground wire along basement wall?

What would be a sturdy and efficient way to mount a single 10 AWG solid core ground wire along an unfinished concrete basement wall (connectors, fasteners, etc)? I'm connecting a server rack ground ...
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  • 221