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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141 views

Is a wire coiled around a post adequate for grounding light fixture bases?

I was changing a light bulb in a ceiling light fixture. I unscrewed the nut and removed the glass cover. When I was replacing the bulb I noticed that there was a copper wire loosely coiled around the ...
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2answers
7k views

Bonding Neutral and ground in a service panel

My home has a 200amp meter box with 6 double breakers beneath the meter under a flap - 4 breakers are 60amp (stove heater, AC, unknown) - there are also 2 100amp breakers going to load centers inside -...
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53 views

Installing grounding rods…without hitting something critical?

Is there an easy way to figure out where a safe location for grounding rods are? I don't want to hit a sewer line or a water line. Our house is on a raised foundation and has a crawlspace underneath. ...
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120 views

short to earth 120 v ac breaker

If a hot wire is shorted to earth i.e. the hot 120 v ac wire that comes out of a Ex. 20 amp breaker is directly connected (short) to a grounding rod, why wont the breaker trip.
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7k views

No ground wire connected to the 3-way switch

I am no expert in electrical stuff as i have never done it before. We recently moved into a new house and i don't really like the look of the old switches. I was looking around them and i noticed the ...
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2answers
473 views

Replacing receptacle, ground and neutral are connected

My house was built in 1974. I have doubts the wiring has changed since then (aluminum everywhere) and have already noticed some bad things (downstairs potlights on same breaker as upstairs living room!...
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4answers
35k views

How far does a ground rod need to be from the foundation?

I need to ground an antenna strapped to my chimney, which requires hammering in a new ground rod. However, the entire side of my house is paved, meaning I can't dig it up to find the foundation ...
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2answers
49 views

Can a grounding conductor from equipment terminate in a metal box grounded via EMT?

I have EMT leading to a metal junction box, and from that box goes plastic liquid tight to some equipment. Currently I have a ground conductor running all the way back to the panel, but I'm wondering ...
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1answer
284 views

Adding Ground Wire to Existing NEMA 10-30 socket

I have a question about changing my 10-30 wall outlet to 14-30 for charging my EV. I thought it was a simple trip to Home Depot but it seems I may be not code compliant. I bought a Level 2, 20 amp ...
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1answer
326 views

Why American homes are wired TNC-S and not TNC

I wonder why American buildings are mostly grounded TNCS and not just TNC. They have virtually no RCD protection, and also an RCD could work fin on TNC system as long as PE on outlet is connected on ...
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1answer
33 views

How to add grounded junction boxes when installing recessed lighting?

I'm interested in adding recessed lighting in my basement where there are only two flush mount fluorescent fixtures, so I'd be adding 8 or 10 additional fixtures. My home has no dedicated ground wire, ...
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1answer
81 views

Is my ground correct at my subpanel?

I have a subpanel at my garage. It has 2 hots, one neutral and one ground from the service panel. The neutral and ground in the subpanel are not bonded. All the outlets including GFCIs all work ...
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1answer
3k views

Can plug an air-conditioner into a outlet with an adapter

So I'm getting a window unit and I've read online that you should never plug an AC into a power strip or even use an extension cord. My room has no three prong(grounded) outlets, can I plug the AC ...
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1answer
420 views

Can I use this copper wire to add a ground to an ungrounded outlet?

I would like to add a ground to an ungrounded outlet so that I can use a surge protector with some electronics. How do you add a separate ground back to panel on 2 wire ungrounded outlet? The copper ...
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1answer
48 views

Ceiling fan grounding

I have a new ceiling fan with a ground wire but no ground fron the metal box. Where can I attach the wire on the fan so it’s grounded?
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2answers
108 views

Unwanted grounding from metal screws in metal boxes

In the winter I repeatedly get intense static discharge shocks from the faceplate screws in my basement light switch panels (which are grounded metal boxes, unlike the plastic ones used in non-...
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1answer
147 views

Mysterious 40v multimeter reading on AC appliance chassis (US 120v)

I'm an electronics guy but my specialty is DC stuff, I know very little about AC wiring, so forgive my naivete... I have an old 16mm slide projector I found in my grandparents house. The original AC ...
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2answers
657 views

Long outside wire run - can I JUST ground at both ends?

I'm planning to run 300 ft of direct burial, 12 gauge, 3-conductors, no ground cable. Buried underground. The cable will carry 240v split phase. The main panel at the start of the run is already ...
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1answer
469 views

Should I install a grounding rod near my light post to protect against lightning?

We have a very old house, which has had an old run of electrical cable (2-wire) from the basement about 40ft to a lamp post that has been unused. The old cable has been disconnected, and the current ...
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3answers
252 views

How dangerous is it to leave a 35KVA diesel generator ungrounded?

How dangerous is it to leave 35KVA diesel generator ungrounded? This generator is connected to temporary metal buildings for workers, AC and other electrical devices.
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2answers
617 views

Grounding a Ballast for wood enclosure when there is no metal?

I have a big 6'x4'x3' enclosure (glass and wood) for my Tegu monitor. The external magnetic ballast for my fluorescent light broke and I would like to replace it with an electronic ballast. The ...
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2answers
3k views

Is this neutral-ground bus bar configuration correct?

Looking inside the electrical panel in the house I bought, I was surprised to see the neutral bus bar crowded right up next to the ground bus bar, so much so that it seems the ground bus bar is ...
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1answer
200 views

Trying to install Cooper surface LED down light to ceiling but don't see a ground wire

I'm trying to install a Cooper LED down light to a pre-existing ceiling metal electric box that has been un-used. I know to turn off electricity at the breaker and that white wire from light ...
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2answers
118 views

Grounding of an old house

I am replacing the wiring of an old house( partially burned),some of the 220v appliances such the stove and the clothes dryer have only 3 wires( black, red and white), I think (not sure) the house is ...
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1answer
131 views

USA outlet states not grounded from surge protector for all outlets in only 1 room in my house

I have 1 room that will be my theater room in my house, and for all the outlets in this room, the grounded light on multiple surge protectors doesn't light up. If i move those surge protectors to any ...
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2answers
915 views

How to test grounding in AC outlets?

How I can test that the ground cable of my AC power outlet is really grounded / correctly grounded ? Is a quick test that I can do or an instrument that does just that ? Also, how is grounding ...
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1answer
87 views

main breaker panel to sub panel

The main breaker panel has the grounds and neutral hooked together and has bonding screw installed. Where do I put the ground wire for the sub panel? Do I put it on the neutral bare where the white ...
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1answer
124 views

Three sets of wires and no clear way to ground

We're changing the extremely old fixtures in our hallway with some sleek modern LED lighting. Upon removing the fixture I discovered three sets of twisted wires - double white, black-red (the fixture ...
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1answer
819 views

Does thermostat need to be grounded?

If a thermostat is connected to an air handler, which is connected to the main panel and has a ground wire, should one of the thermostat wires be connected to the ground?
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1answer
62 views

Restrictions on tying grounds together?

I'm replacing the hard line to the garbage disposal. Instead of the hard line i'm installing an outlet. The box where the garbage disposal switch is located has two circuits in it. One is for the ...
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1answer
73 views

No electric in my garage

My electricity in my garage went out recently. The UF wires are buried righht next to a large tree, so im assuming the roots had something to do with it. Well it rained for 2 days straight and my ...
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2answers
1k views

What if I can not connect the ground wire of my new light fixture to an old electrical connection?

I am replacing a bathroom medicine cabinet that has a light fixture attached. The old light fixture only had white and black wires. The new light fixture has white, black, and a copper wire. This is a ...
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1answer
553 views

Adding ground to an existing conduit

Continuing my basement shop brainstorming... As I said in another question, the good news is that I've got a 30-amp 240V circuit more or less in the right place and available, and easily accessible ...
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1answer
128 views

Will I get electrocuted if I contact a live wire on an earthed appliance?

I have an appliance that has the wires connected well and it has been grounded (earthed). If I accidentally get into contact with a live wire will I get electrocuted considering it has already been ...
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1answer
7k views

Where is the ground wire on this light fixture controlled by a motion detector?

I bought a Utilitech motion-activated floodlight 0072837. The installation instructions tell me to match up the white, black, and green (ground) wires to the house. I don't see any ground wire coming ...
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1answer
129 views

have power at outlets and lights, with only hot connected from panel..,, whats going on?

I was replacing only the supply wiring running from Electrical box to a existing circuit in my kitchen, which starts at an wall outlet and branches to lights and other outlets. I first connected the ...
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1answer
820 views

Does a fridge thermostat need a ground connection?

I've recently replaced the thermostat in my fridge with a new unit with a much higher temperature range (this unit specifically). The unit I took out had a ground connector & the original wiring ...
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1answer
33 views

Antenna Ground/Attic

I have mounted a Clearstream Antenna in my attic of a single story home, which is connected to my tv's via cable. Should I ground it and if so how? Can I run a Copper wire from the splitter to the ...
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1answer
47 views

Grounding light switch to electrical box?

I've been replacing a few light switch in the house. Ran into a small snag. Old house, so there isn't a ground wire in the box for the switch, just the line and load wires. I've connected the new ...
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2answers
132 views

Do branch circuits sharing conduit with sub-panel feeder wires require separate grounding?

I have installed a 75 amp sub panel with three #6THHN and a #8 ground from the main. I need to move two branch circuits from main to sub since I do not have space in the 200amp main for the sub panel ...
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2answers
76 views

Ground Wires in Bathroom Vanity Light

I am replacing a vanity light in my condo. I removed the old fixture, which was a cheap long shallow box with five round bulbs. Lo and behold, there was no junction box behind the fixture, as all ...
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2answers
102 views

What is the correct way to attach two grounding sources to my electrical panel?

I replaced my existing electrical panel with this electrical panel in order to have more available slots to redo my kitchen. I have one 6# copper wire ran & attached the water main and one 6# ...
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1answer
45 views

Grounded outlet with load for ungrounded outlet

Moved into a place, nearly every outlet is ungrounded with the exception of a couple GFCI in the kitchen and bath. Needed three prong for the fridge (and really didn't want the new appliance ...
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1answer
55 views

grounding wire extension

I have an above ground pool which was grounded for safety. I had to buy a new pump (motor) and unfortunately the ground wire was too short to reach the pump. I had to move the filter and pump to reach ...
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1answer
49 views

Earth clamp material for copper pipe

I have a copper water pipe i want to connect to earth. I bought some pipe earth clamps but I’m suspicious that maybe the material they’re made from is not suitable and will result in galvanic ...
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1answer
78 views

Electrical Bonding for an exterior building

I have to upgrade the service I have for an exterior building. The wiring follows the old code, and I'll need a permit to do it. So I am going to have to update the service and everything to the ...
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1answer
39 views

Dangers of connecting Neutral to case of blower?

(Not an Electrician) I have a 220V air handler (not part of the HVAC system its for a homemade wind tunnel) that I need to get power to. There is an old dryer receptacle (10-30R) in the basement that ...
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1answer
309 views

Grounding Wire to copper pipe for cable

I'm working on renovating my basement, but first am replacing all of my existing copper pipes with modern CPVC to eliminate the constant leak headache since we are on a well. Last night I found this ...
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1answer
56 views

How to add grounds to a 120 amp panel and grounds electrical outlets

I'm buying an older home. The inspection showed no ground on the panel and no ground on some outlets. I'm assuming the outlets are near water, sinks, etc, that need the reset protection. I currently ...
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1answer
122 views

Grounding a 3-wire sub-panel in attic

Early 1960's home. 200-amp main service panel on first floor. 3-wire (L-L-N) feeder to 100-amp sub-panel in the second floor attic, about 25-30 feet from the main service panel. Neutral and ground ...