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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69 views

How should I ground a shop and a house who both have 2 breaker boxes? One fed by the grid and the other a solar inverter

As the title states, I have a house and a shop both with 240 feeders coming from the grid. I have solar panels and a solar inverter in the shop. The solar inverter is powered by panels, a 48v ...
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53 views

How do you verify a good ground connection when using EMT conduit as the ground?

When using metallic conduit as the ground wire, how do you confirm that the conduit provides a solid end-to-end connection? If using an ohm meter, how would you set it up and how many ohms are ...
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53 views

what to do with metal box with no grounding screw?

I have an outlet in the age that appeared to be from 1960s. I decided to replace it with a GFCI receptacle after getting charging issues with EV. After opening the outlet up, it appears that the ...
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63 views

Providing a ground to old 2-wire connection in a detached garage

I just moved into a house built back in 1961. The house was totally rewired in 2018 so is up to code. The garage is detached and has two old 2-wire, 15 amp 120 volt circuits with no ground wire ...
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60 views

Two Neutral Wires on Light Switch

I want to install an in-wall lighting timer for my front outdoor lights, replacing an existing light switch. I turned off the breaker to the switch I wish to replace and I've determined which black ...
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1answer
50 views

Wiring ground wire to mounting plate on new light fixture

I put in a new light fixture today. It came with this braided copper wire attached to the ground screw. Rather than use that braided wire, I simply secured the ground wire directly under the ground ...
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2answers
42 views

Running ground wire from CSST to house ground

I recently installed CSST in my basement to supply natural gas to an outside BBQ grill. Essentially it's CSST from the manifold to a termination plate on the wall, and then black iron pipe outside ...
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1answer
44 views

Lighting fixture ground wire splicing

I installed a lighting fixture that hangs from a chain over my dining room table. I realize that I did not hang it long enough so I want to add some chain links which means I have to have more ground ...
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2answers
98 views

How do I ground an AC inverter in a RV?

I am working on installing a Victron Energy Phoenix Inverter 800VA into my little teardrop RV. I am doing something men just don't do, I read the Victron Energy Phoenix Inverter manual! Appendix A ...
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1answer
74 views

grounding rod concrete

Is it Ok to cover over a grounding rod in concrete? I have two grounding rods one is right by the meter socket and the other one is about 6 feet away. I am having a concrete patio and wanted to know ...
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1answer
50 views

PEX Upgrade With Plumbing System Electrical Grounding

I'd like to replace my old outdoor hose bibb (because it's really difficult to turn on) with a new hose bibb and PEX. Ground Wire 1 On the other side of the hose bibb is copper pipe and a clamped ...
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44 views

Grounding Metal Boxes to Outlets & Earth

I have some wiring questions. These are my wiring options I have available & seeking some insight. I am running a 30A 120v outlet From the 100A Box in the garage I will run 10-2 w/ground wire to ...
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1answer
42 views

Lutron Fan/Light Dimmer switch Install

I am trying to install a Lutron Maestro Fan/Light dimmer, but I’m not sure what to do with the ground wire on the switch. The old fan/light dimmer switch does not have a ground wire. The switch box ...
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53 views

Grounding Rod Requirements (Canada, Ontario)?

Been reading up on grounding requirements in my region, but am rather confused about the 2015 code. Rule 10-700 of the Canadian Electrical Code states that Rod electrodes must consist of at least two ...
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0answers
41 views

Earthing a gate motor

I'm installing a gate motor for out front gate and I'm trying to figure out the best way to install the earth connection. The operator itself comes with a ground wire that's attached to the housing, ...
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1answer
42 views

What wire do I use to retrofit a ground wire from new range back to breaker box?

Redoing my kitchen and installing a new range while also moving the location of the range outlet (thus, I am required to bring it up to code). Existing range is 8/3 with no ground and a 3 prong outlet ...
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1answer
93 views

Can I use a 3-pin plug for double insulated appliance?

I haven't been able find a rewirable unearthed (as in 3-pin, one of which plastic) UK mains plug. (I didn't think before hand, but I suppose they're not allowed by BS1363 since you could then too ...
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1answer
121 views

Does my generator interlock require a ground rod?

I will back feed the main panel of my home with the portable generator, power inlet box and breaker. The schematic for the generator shows that neutral is connected to the ground inside the generator. ...
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4answers
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Is it wrong to run ground wires all the way through conduit to each junction box?

I had a 20A circuit that was run to a work bench built by the previous owner of my home. I ended up replacing the work bench and replacing the circuit, with new THHN wiring all run through EMT conduit....
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63 views

Can I use 6/1 type ac wire to bond my ground rod to my water pipe that is 100 ft away?

My licensed electrician and city inspector are both asleep as I am ordering the parts to finish a 200 amp service upgrade. Unfortunately, due to the pandemic there is a big shortage on building ...
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1answer
64 views

Grounding Power at an Isolated Outbuilding?

I am looking to draw off some electricity from an outbuilding. It looks like we have an 60 amp fuse hooked up to 3 wires binging power to this outbuilding. So no ground standard 240v power. I don't ...
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1answer
118 views

Broken ground rod wire loop - electrical service grounding

At a house, with 200 Amp service there is a #6 ground wire loop going from the main service entrance panel to two ground rods, and then back to the panel. There is a separate wire to the copper ...
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2answers
100 views

How critical is replacement of a non-compliant ground rod?

I was working outside around my main, single ground rod and noticed it was a bit wiggly. Closer inspection shows that what appears to be a 12-18” piece of rebar was used as a grounding rod. Now, I ...
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3answers
2k views

No ground wire or GFCI for a dishwasher

I recently purchased an apartment in New York City built ~2006, and we started renovating the kitchen. After I unhooked the dishwasher (an older Bosch model) I found that there was only a hot and ...
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102 views

How to fix bonded neutral and ground in subpanels

I am selling my home and the buyers inspection says the bonded neutral and ground must be corrected. How should I fix this?
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21 views

Replacing two toggle switches that are linked with the same grounding wire

The bathroom light switches are wired to independent red and black switches but are connected together by a copper grounding wire that is looped around one screw and then terminates on the second ...
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3answers
155 views

Apartment electricity potentially harming electronics; how to fix?

I've been having some issues with the electricity in my apartment (potentially 1950's built) going to my electronics. I have two laptops (one of which is my work laptop) and an iPhone. Laptops are ...
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2answers
564 views

My PoE adapter has a separate grounding wire - how do I wire it?

I am trying to add a power-over-ethernet adapter to my set-up. It has a small ground wire (yellow-green sleeve) with a small metal circle at its end going out of it which I assume I should connect ...
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0answers
134 views

Grounding cable TV coax near cable entrance: can I run a ground wire into a breaker panel? or defer grounding to 50 feet inside the house?

My new cable TV coax will enter my house at the far corner relative the location of all my other utilities (main electrical panel, water, gas, telephone, and a wire to an existing buried ground plate) ...
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1answer
94 views

Safety question about isolating transformer

I have a situation identical to the one linked below and I was wondering what others might think. Electrical professionals have told me two different things and I want go with the safest option. I ...
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4answers
86 views

Should I ground this unknown wire to a junction box ground wire?

In the process of cleaning up the basement, I found an unknown wire attached to the a water line in the basement that I can't easily trace. The waterline isn't copper to the street, though, but uses ...
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1answer
101 views

Receptacle tester shows "correct" although ground is disconnected

If I disconnect the "ground" wire at the junction box that feeds a GFCI outlet/receptacle, I was expecting a receptacle tester to show "open ground", instead it says "correct&...
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3answers
114 views

How do you ground cat6a patch panel in Britain?

I am venturing in to the world of shielded network cable and am installing some cat6a in to a cat6a patch panel which has an earth cable. How do I physically connect that earth cable to ground? Should ...
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80 views

How to properly ground when welding

I read several articles online about grounding when welding and I'm more confused than when I started. I have an AC welder (old Lincoln buzz box)...just in case the type matters (AC vs DC). Here are ...
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2answers
101 views

12/3 underground to garage multiple 14/2 wires to bare 12/3. No ground rod anywhere around 14 x54 detached garage

I've been in this house, built in 1941, for two years now. I've been working on replacing very old wiring in the basement for some uncomfortable issues I've found. But these issues pale in comparison ...
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9answers
5k views

I live in an older home without ground wiring. Is it safe to install 3-prong GFCI with only a hot and neutral?

I live in an older home that doesn't have any ground wiring. Is it safe to just install 3-prong GFCI outlets and use devices and appliances that expect a ground wire connection when I just have the ...
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1answer
77 views

Wanting to add a ground wire for a sub panel replacement. Would like to use use nearby EMT

Updating electric in an attached shop. There are two sub panels, both fed 240 from the main panel in the house. The one has large aluminum conduit, with the conduit serving as ground. The smaller ...
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1answer
39 views

Can a 20' section of #4 rebar server as concrete-encased electrode ( UFER ) if it is not attached to the rest of the rebar matrix in an on-grade slab

Let's say we have 9'x25' monolithic concrete slab of 5" thickness with a 12" deep by 12" wide "haunch" footer around the perimeter. At 2-1/2" inches below the surface of ...
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2answers
150 views

Voltage between shower faucet and drain

Is it normal to have voltage between shower faucet and drain? I measured 2 volts between shower faucet and drain when water heater is off, and 11-12 volts when it is on?
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3answers
283 views

What can I do about these exposed grounding rods?

There are two grounding rods outside my house that stick out above the ground. Besides being a pain to mow around, the longer (bent) one is quite easy to trip over. Is there anything I can do to get ...
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3answers
521 views

Ground wire pass-through safety switch to sub panel?

I have an out-building 150+ feet from the main service panel with its own 240v 60 amp sub panel. It is powered via a four wire bundle going through underground conduit -- 2 x 120v feeders, 1 neutral, ...
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1answer
63 views

Telco ground: meter panel vs service panel

My meter panel connects to an exterior service panel on the back of my house via a short stretch of NM conduit. The service panel has my main breaker and ties neutral to a grounding wire bonded to a ...
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1answer
67 views

How should I connect ground wires for new ceiling fan?

I am replacing a ceiling fan in a house we just bought. The current box for the fan has 3 sets of wires coming into it, one for the switch and 2 for the outlets. However, the ground wires are were ...
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1answer
81 views

AFCI receptacles vs GFCI receptacles for non-grounded outlets

I'm replacing a few 2-prong receptacles in an old house, and all these outlets do not have ground wires. Cost for rewiring is too much and I'm thinking about using GFCI / AFCI receptacles instead. My ...
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1answer
78 views

What is the appropriate fitting to connect an armored cable to this stand-alone receptacle product?

I have a pre-existing #6-3 armored cable (without a separate ground conductor), as shown here: I am replacing the range this was connected to, and would like to provide a 4-wire connection via a 14-...
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1answer
48 views

Retrofit ground wire from water main ground

I am replacing an old oven. It is currently wired with 3 wire (AL SE cable) and has no dedicated ground run. I would like to install a proper 4 wire outlet for the new range. Am I allowed to use the ...
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2answers
134 views

Can I use the metal cladding of a cable as ground for this range installation?

I have a pre-existing #6-3 cable (without ground) with metal cladding on a 50-A two-pole circuit that was wired into a range. As shown in the photo, this cable has only black, red, and white ...
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2answers
101 views

Neutral and ground seperation at a sub-panel

Could someone explain to me why the neutral and ground bars are never bonded on a sub panel? It's my understanding that the reason they're separated is so that the current returning on the neutral ...
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3answers
77 views

Grounding in 250v & 125v

My comment is more of a question regarding the mechanics of a problem I have. It is not theory or math. I have that down pretty good. Here is the problem: let's start at the power source. We have the ...
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1answer
49 views

GEC and NM cable through same hole?

I'm replacing old 240v wiring in our home and the grounding electrode conductor was put through the same hole in the stud as the 240v cable was. I am not wanting to drill any more holes in the studs ...

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