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Questions tagged [grounding]

Grounding (also called earthing) refers to the practice of providing an un-energized path back to the main neutral. This is done to allow any electrical faults to flow into that circuit, instead of anyone touching the fault. Use with the [electrical] tag.

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Grounding a dryer to a subpanel

Related to Grounding a 3-prong dryer plug, but with a small twist. I have a NEMA 10-30 that runs back to my main panel. Since we had a leak in the laundry room, I'm having to open the wall. I'd like ...
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Can a subpanel ground originate from a separate circuit/conduit?

I have a 30amp pool subpanel wired with 10awg THHN through 3/4" schedule 40 PVC conduit. I'm considering installing a heat pump pool heater which will require a beefier subpanel. Can I run 2x ...
Travis's user avatar
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Can I use a hose clamp to ground a wire to EMT?

Question: What are the rules for how to attach a wire to an already grounded EMT conduit? Can I use stainless steel host clamp and tighten down? Background: I was installing a metal box for a light ...
KJ7LNW's user avatar
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New Construction Electrical from meter box to: 1-200 amp house service and 1 -separate RV Pedestal with 120 receptacle, and 30 and 50 amp receptacles

We live in Nevada and have 200 amp service. We are running from the meter box to the house (150 ft) with 4/0 4/0 2/0 AL URD to the service panel. We also want to run from the meter to a campground RV ...
dawn scott's user avatar
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No obvious neutral in breaker box

Just bought a house built in 1960. No grounds to outlets, not a big issue, just GFI the circuits. Bought GFI breakers, for the box. I identified the circuits that need the GFI breakers. There are ...
david kardelis's user avatar
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Does short CSST line off of copper need to be grounded to main panel?

The LP gas in my house runs through soft copper tubing. I am adding a gas range and have a chunk of CSST left from adding heat to an outbuilding. If I tap into the copper and run CSST to the range (...
T. Laubach's user avatar
2 votes
2 answers
182 views

Can I bond a ground wire to a junction box that is using metal conduit for ground

I'm trying to clean up a situation where there's originally rigid metal conduit and no ground wires from the panel. Someone has added flexible metal conduit at several junction boxes down line that ...
ziondreamt's user avatar
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not sure why this ground wire keeps tripping the breaker

I'm putting in a new switched ceiling outlet in a garage for ceiling shop lights. I want to have a 2-way switch to allow control from either side of the garage. For some reason the breaker trips if I ...
GerryT's user avatar
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Using a section of copper pipe as a stop gap for ground

Can I use a 20' section of an exposed 3/4" cold water copper pipe in my garage by attaching a proper ground wire from the breaker panel on one end and using the other end as a substitute ...
Handyman's user avatar
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Is my light switch box grounded and how to use the ground wires properly

I'm attempting to install a smart light switch and I noticed the old one was not connected to the two bound up ground wires in the box. The box itself seems to be painted metal. I assume the smart ...
Andrew's user avatar
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Why do electrical fixtures with multiple live/neutral terminals have only one earth terminal? [duplicate]

As can be seen in this illustration: I became curious about this while rewiring my house recently, in which I've installed a lot of these. Live and neutral almost always tend to have paired line and ...
Cerebrate's user avatar
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Why did a wire short to the metal junction box without tripping the breaker?

I opened up a junction box to reconfigure two switches. I turned the breaker off and unscrewed one switch and all of its wires. The hot, neutral and ground were separated so they wouldn't touch. I ...
milesmeow's user avatar
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Do I need to ground the junction box for a security light/camera?

I used an existing Romex cable that was not connected to anything (it has power bc I tested with a non contact tester). I drilled through my plaster wall and fed the cable to the outside. I added an ...
milesmeow's user avatar
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Stove plug wiring

This guy was installing a stove plug and the only wires inside were size 6 and 2 hots and a ground and he split the ground wires in half and put half on the neutral screw and half on the ground screw ...
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Why is my electrical panel buzzing?

I hope you can help me identify where this is coming from. First my electrical is all metallic with 2 wires only, and ground via metal conduit. After some troubleshooting I've found the following: On ...
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Should I cut or detach a ground wire for a light fixture to remove it?

I have a chain hung luminaire light fixture in bathroom. I am replacing light fixture and the ground wire is preventing me from removing it. Cut it? I have heard different things to remedy the ...
Sydnei Webb's user avatar
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How do I safely ground and bond my circuit?

I'm trying to design and install a very simple little off grid power setup for a one room cabin. It would have a main solar power source and a backup generator. I'm trying to design a simple AC ...
Foopysfarm 's user avatar
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Can I connect a ground rod to a wire on my backyard

Long story short, my mom's kitchen got a renovation, the house had no ground (old house), the electrician punt the colored wires correctly including a ground that I asked him to, but now that they are ...
Emir's user avatar
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Is there an earth bridge missing in my PV installation?

In the DC installation depicted in the following image, is there a bridge missing in the earth distribution in the center? The top right earth wire is coming from the potential distribution rail ...
serbap's user avatar
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Static shock on a device on a different circuit causes PC keyboard backlight to blink

When I touch an electric space heater, sometimes there'll be a static discharge. No big deal but what's odd is that every time this happens, the backlights on a USB keyboard plugged into a PC blink ...
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Does every single ground wire in a box have to connect to every other ground wire within the confines of that same box on one branch circuit?

I have a 3-gang plastic box with six conductors that enter the box; three line-side, three load-side, and they pass through the three switches in pairs of two. The load-side wires are all on the same ...
Ryan Mortensen's user avatar
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1 answer
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Will running a wire from a PSU screw to my metal window sill do anything?

I recently moved into an old apartment with no ground in the wiring. An electrician checked, and it needs to be retrofitted for ground. This requires approval. In the meantime, I need my work station ...
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Proper Connections for a Light Switch

I had an electrician out this weekend and he replaced 3 light switches. I just opened two of them to check and I noticed that none of the wires are wrapped around the two gold screws or the green ...
Lindsay's user avatar
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2 answers
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Grounding for junction box above panel

I'm planning to mount a 12x12x6 junction box above my new panel to extend some wires that do not reach into my new panel and add CT's for energy monitoring. I saw an electrician on Youtube that ...
Christian K's user avatar
12 votes
2 answers
2k views

Does NEC allow a metal box to carry the ground connection between separate conductors?

I found this box: You can see that most of the conductors have their grounds crimped together in the deep part of the box. A box extension was added to this at some point, so it is rather deep, but ...
Ryan Mortensen's user avatar
1 vote
0 answers
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How to properly ground panel box if I'm replacing all copper with PEX?

So I've got a 1950s house and I'm in the planning stages of a project to replace all the copper plumbing with PEX. The copper is in really bad shape, there are ancient gate valves all over the place ...
Livin' In The Mountains's user avatar
2 votes
2 answers
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Emergency Disconnect Ground Questions

I want to start by saying I’m not an electrician. I’m building my own home and I’m doing the electrical myself. This is completely legal in my state of Maine. I have a question on how to properly ...
Joelp's user avatar
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Neutral Ground Bonding with 2 Main Breakers

My electrical service has a meter outside, followed immediately by a 200A breaker, then feeder wires head into my basement and supply a “main” panel with another 200a main breaker. This main panel has ...
William S's user avatar
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1 answer
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Ground rod to exterior disconnect panel routing & panel attachment

I'm getting my shop power reconnected after prior storm damage and the inspector said he'd need to see a ground rod connection to the panel. I've included pictures of the existing ground rod though it ...
Merrick's user avatar
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Low-voltage Wires Alongside a Grounding Electrode Conductor?

I have a bare copper Grounding Electrode Conductor running from my main panel to my main water supply in a well room (about 60 ft away). It passes through quite a few holes in my joists on its way, ...
Steve P.'s user avatar
2 votes
1 answer
377 views

Ground wire not connected to light switch

I'm replacing my 3 way light switch and noticed that there is no ground screw on the existing light switch and the bare ground wire is just tucked in the back of the plastic switch box. My new switch ...
Frank's user avatar
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1 vote
0 answers
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LED power supply with no ground, on what looks like a GFCI breaker

I am installing 12V LED strip lighting in 5 closets of my home. My intention is to use a single Mean Well HLG-185H-12A power supply in the attic, and then run low voltage wire to each closet through a ...
nickwesselman's user avatar
1 vote
1 answer
97 views

Junction box from main to subpanel - what to do?

I am doing a DIY 400A service upgrade and I would like to get some vetting on my work before the utility connects it and the city inspects it. The meter/main combo is outside behind this wall of the ...
Alessio Sangalli's user avatar
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1 answer
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Grounding Brass Fixture

The light fixture has no grounding wire attached. Since it’s all brass and going on the porch I think the exterior must be grounded. Do I just affix a wire to the metal somehow? Probably at the ...
AlwaysThinkin's user avatar
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replacing my old galvanized pipes with pex, what do i do with the ground wires

so ive got galvanized water lines servicing my house, along with that 6 or 7 wires that are clamped to the pipes,im going to relace everything with pex, im pretty sure i cant just clamp the wires back ...
rocky's user avatar
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2 votes
0 answers
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How do I get my grounding up to code? Subpanel is missing grounding connector

I have a bit of a situation with my interior subpanel not being grounded properly. The interior subpanel does not receive a ground wire from the main service panel where it is grounded (to the water ...
Dong Shi's user avatar
1 vote
0 answers
67 views

What's a tidy way to transition a THHN ground wire out of EMT?

For some networking equipment (PoE security cameras, PoE IoT devices, outside point-to-point wireless links to other locations) that will be mounted on the perimeter and roof of my residence, I'm ...
Ryan's user avatar
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1 vote
0 answers
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grounding rigid conduit (RMC)

Does a run of electrical rigid metal conduit (RMC) need to be grounded at both ends, if I am not using it as the circuit ground ? For context, I am putting a electric vehicle charging station (EVSE) ...
RustyShackleford's user avatar
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1 answer
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any gotchas when adding extra exterior ground

I have an old house with a single external ground: a thick multi strand silver colored wire bonded to rebar. Current electrical code in many jurisdictions ask for two ground rods, not less than 6 ft. ...
aaron.kyle's user avatar
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1 answer
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Safety of direct bonding to exterior ground for CSST

The instructions for my yellow CSST propane line require it to be bonded where the service enters my home. They also specify not to bond at two points, and not to bond at the appliance. The appliance ...
aaron.kyle's user avatar
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0 answers
66 views

Electric wiring for new LED lights when missing ground wire

I am changing basement lights to new LEDs. The old light fixtures turned on/off via pull string and only two wires (white/black). The new LEDs are the same with the addition of a ground wire. My ...
Arturo Lee's user avatar
3 votes
1 answer
285 views

What to do with ground wire downstream from ungrounded GFCI?

I am replacing an ungrounded receptacle with a GFCI receptacle, and I will be adding two new receptacles downstream from the GFCI receptacle. In another post, someone had quoted from one of the code ...
P-Brain's user avatar
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No Ground Wire in Light Fixture Box

I am changing out my dimmer switch that has not worked in years. When I opened it I do not see where I can connect the dimmer box ground wire to anything. The dual switch next to the dimmer does not ...
Dion's user avatar
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1 answer
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What kind of clamps are used to attach a main panel's grounding wire to two grounding rods?

The grounding clamps I've seen online (see pic) don't seem suited to attaching a main panel's grounding wire to two grounding rods; the orientation of the part of the clamp that grips the wire does ...
mr blint's user avatar
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1 vote
2 answers
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Ground backstabbed into neutral with neutral on ground terminal on a series outlet?

1960s build, electrical redone with a 200 A Siemens panel (where each breaker is labeled with/serves two circuits) about 15ish years ago. Replacing a receptacle, I came across this series outlet with ...
msanford's user avatar
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Wiring grounds from two separate circuits

I am trying to build a rack that has two loads and each load will be powered from a separate circuit. Please see my diagram for reference. Grounding the two enclosure boxes is pretty straightforward. ...
flamezdude's user avatar
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0 answers
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Grounding question: Honda eu7000is generator connected through PG&E backup power transfer meter

Earlier this year PG&E installed a free backup power transfer meter at our California property (info sheet here). Using the cable supplied with the meter, it connects our Honda eu7000is inverter ...
Dave Millman's user avatar
6 votes
1 answer
674 views

How can I make sure I have a ground wire connection for my range?

I recently replaced my electric range. While doing so I notice that the previous range had neutral and ground bridged, even though it had a 4-wire cord. I'm now a little bit insecure about what to do, ...
Daniel's user avatar
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No Grounding Screw When Installing Ring Floodlight [duplicate]

**`I’m installing a Ring Floodlight at an existing light fixture, but there is no grounding screw to attach the green grounding wire from the Ring onto. Is my best option to attach the Ring grounding ...
Bruce's user avatar
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4 votes
2 answers
310 views

How to connect ground from smart switch to the metal junction box

how do I connect the ground wires from my Kasa smart switches to the metal junction box? As shown in photos, the four screws at the back of the j box already have copper wires under. Can I just add a ...
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