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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30 views

Grounding TV Antenna and Metal Porch, And Resolving Ground Rod Issues

I'm mounting a light-weight metal TV antenna to a metal mast attached to old-school metal roof columns (with the curly-cues) on a small second floor porch which has a metal porch roof, and metal floor ...
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23 views

Adding ground…“bare armored ground”: suggestions

I have a 1940's house. Modern panel and sub panel feeding cloth clad cable and knob and tube. Very hard to access crawl space or inside wall because wood ship lap over skip sheathing, shingles over ...
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37k views

Is an explicit ground wire required through steel conduit?

We just bought a Chicago-area house and found that there's no ground wire in some of the recently re-wired areas. I thought that the national electrical code requires a ground wire for new ...
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1answer
93 views

Grounding metal electrical boxes

I would like confirmation on the following: Is any metal box automatically grounded if it is supplied by an armored cable (without a ground wire) that is properly connected to the box and back to the ...
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3answers
55 views

Gas stove no ground in outlet

House was built in the 50's and there is a 3 prong outlet but no ground wire. I've tested it best of my knowledge, the metal casing is not ground either. 2 black and white wires. Basically, am I ...
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0answers
65 views

Attaching a ground wire to a prong that plugs into an outlet adapter

The outlet shown in the image below doesn't have a ground wire connecting to its receptacle. A friend of mine is helping me setup a ups that requires ground wire, however what he did was run a ground ...
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1answer
847 views

What's the deal with this ground wire?

I recently purchased a home that was built in 1963 and have started changing out a few light fixtures. I have come across a wiring method I have never seen before where the ground wires are attached ...
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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
1k views

What should I do with the ground wire on a replacement bathroom fan motor?

I bought a new motor for my bathroom vent fan and it came with a ground wire. The old motor does not have a ground wire, or not that I can see. What should I do with the ground wire?
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3answers
3k views

When are copper pipes a ground?

There is an exposed copper wire attached to the cold-water pipe near the dryer plug in my house. It's not attached to anything and I'm wondering when it would be useful if at all? This wire just ...
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2answers
91 views

Can I use the ground wire as a neutral for an outlet?

I had a bulb light outlet, and I decided to convert it to power outlet. Now when I took the bulb light off, I discovered that there is only two wires in the wall, brown and yellow green, so I assume ...
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3answers
2k views

How did my ground and neutral become energized by a short in the buried main line?

Long post, because I'm not sure what information is critical. The ultimate question is what, if anything, I need to do to ensure there are no hazardous conditions in my home. Friday night, the ...
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2answers
70 views

Do multiple ground bus bars need to be tied on subpanel?

I'm adding circuits to a subpanel. For wiring neatness sake, I'm considering adding a second ground bus bar. Do I need to tie both ground bars together (if so, what size wire), or is screwing them ...
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1answer
84 views

New Circuit Faceless AFCI tripping with no load

Most AFCI questions here revolve around existing circuits, and AFCI Circuit breakers, but my situation is a little different. Here's the details: Renovation to add a half bath and laundry room in ...
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4answers
82 views

Can you have neutrals on ground bar only bonded through main panel body

I have just added a circuit to my main panel and saw something I wanted clarification on. For reference, my main panel is a Homeline 30 space panel with 2 extra grounding bars on the sides. Picture ...
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2answers
595 views

Replacing bathroom exhaust fan without ground

I'm replacing a bathroom exhaust fan. The previous fan is probably about 30 years old and was not grounded. In fact, the wiring in the bathroom does not have ground. The fan will be mounted to a steel ...
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3answers
103 views

How to stop current originating from common ground wire?

A building has all the apartments' electric panels connected to a common ground wire. Theoretical situation: 1. one of the building's electric panels has its differential circuit breaker broken 2. it ...
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1answer
29 views

Voltage on ground wire of LED light, changes when dimmed?

Why would there be a voltage on the ground wire of an LED light, that varies according to how the dimmer is set? When at full brightness, the ground wire reads ~30VAC, when it is mostly dimmed, it ...
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2answers
109 views

Does an existing unprotected conductor need to be immediately rewired?

While cleaning up under the sink, I noticed that an existing owner wired the disposal outlet as shown: It has a red conductor traveling into the crawlspace without a plastic or metallic sheath. I ...
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2answers
40k views

Does an extension cord from 2 to 3 prongs have any benefits?

If you're plugging a device with a 2-prong plug into an extension cord that has 3 prongs on the other end, does that give it the grounding benefit of the third prong?
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396 views

How do I ground a new outlet that only has the black/white wires?

I am adding a new outlet but want to make sure it is correctly grounded. I have outlet A that I am going to be creating a new outlet B. I tested A and it says it is grounded and want to ground ...
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1answer
30 views

Is this smart plug safe? only 2 pins

I would like to use the TP-link HS110 to control my plant grow lights and monitor the energy usage. I have chosen this model specifically as it has many raspberry pi compatible hacks to avoid using ...
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1answer
65 views

What should I do about no ground wire

I bought a new bath fan for my old house(1920s). Where the fan is installed, there is a power/black, and a neutral, but no ground wire to connect to it. It's old knob and tube wiring. Is no ground ...
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6answers
42k views

Grounding requirements for main panel and subpanel

I recently had my main service professionally upgraded to 200A and had a 60A subpanel installed in my master suite to support future additions. All work passed city inspection, for whatever that's ...
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3answers
14k views

Light Switch with no ground

I’m replacing my light switches with Lutron Caseta switches. When I pull the old ones out I noticed they don’t have grounds. The box they are in is plastic. Is it okay to not ha e a ground in the new ...
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4answers
6k views

Why don't electrical receptacles have more than one ground?

All modern receptacles have places for additional hot/neutral wires so you can add more outlets in series, but they all have a single screw or hole for the ground wire. Why don't they have two ground ...
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3answers
176 views

Converting Nema 10-50 receptacle for car charging

I might be buying an electric car soon and i was wondering if I could use my current nema 10-50 dryer plug for my 240v evse? The plug is not used since I have a gas dryer. The receptacle was ...
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1answer
143 views

Oven has 2-prong plug plus earth wire. Socket is modern 3-prong. How to connect?

My 110V toaster oven has a 2-prong cable. Also, the oven's chassis has a screw with a connected green/yellow earth wire, which I want to ground. My wall socket is a modern 3-prong with earth and all. ...
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2answers
78 views

Does the Long Leg of the Grounding Clip go Inside or Outside of the Electrical Box?

I have a model #GEE-B10-10 Grounding Clip that I'm not sure how to install. Does the long leg go on the outside or on the inside of the electrical box? Long side: Short side:
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3answers
538 views

If my heat pump does not have a neutral, do I still need a neutral wire?

I had a friend wire 10-3 line for a new heat pump. He connected the red and black conductor wires in the house to the 2-pole 60 amp breaker and the neutral white to the neutral bus bar. The outdoor ...
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1answer
74 views

Botched grounding in receptacle junction boxes

Background: I recently moved into an apartment building in Canada (built in 1969). I don't know much about the electrical code, how grand-fathering works within it, etc., but I have an intermediate ...
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1answer
111 views

Connect two grounding rods

I added an exterior TV antenna and a grounding rod next to it with a 6 gauge copper wire going to both the antenna mast and the ground on the coax coming from the antenna. It is about 15 feet from ...
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5answers
236 views

Can I connect the ground pin of the wall socket to neutral?

I have leaking currents issues in my apartment. There are some appliances in the apartment that don't have a problem with a wall socket that doesn't have a ground; like, TV, mobile charger, laptop ...
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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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1answer
26 views

Installing a new smart switch into box, wanting to double check plan (primarily with regards to ground wires)

I'm looking to install a new smart switch into a 3 gang box. The current box has 3 toggle switches, each of which is without connection to a ground wire. The box itself has 5 sets of wires coming into ...
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1answer
63 views

How do I connect light fixture’s ground to supply wires?

Location: US While not exactly a novice in regards to electrical, I’m a little confused here. Replacing ceiling fan+light combo controlled by two switches with light fixture (removing one switch/...
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2answers
827 views

Why is neutral wired to ground at this switch?

I was looking to add an outlet near my light switch in the garage. When I opened the box for the switch I noticed that the neutral is wired to the ground. In the picture of the switch, the top wire ...
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1answer
1k views

How to electrically ground a gas furnace connected with an armoured cable

My gas furnace will not turn on. I verified 120V where the armoured cable enters the furance, so I was going to continue testing for voltage before and after the transformer (with the door safety ...
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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
78 views

Bonding vs grounding a main and sub panel

I am in the process of building a new home and of course I'm saving some money by doing all the wiring myself. I do have a decent bit of experience with electrical work, but the main panel is a little ...
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1answer
93 views

60 amp sub panel, 100 ft away from main panel. Grounding rod or not?

Adding a 60amp sub panel (4breakers) on the 2nd floor for a dehumidification system and some misc. Running 100 feet of 6/3 wire. I am assuming that I can use the ground wire in the 6/3 from that ...
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1answer
138 views

How urgent is it to resolve two-prong problems?

I have read How do I use three-prong appliances when my outlets are mostly two-prong?. I have recently moved into a house that has some two-prong and some three-prong outlets. The place in the ...
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1answer
76 views

Is there a Grounding Electrode that can be buried less than 18"?

A house that is being constructed is being built on ground that is only 18" deep before it hits bedrock. The rebar can't be used as the grounding electrode because there is a vapor barrier below the ...
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1answer
106 views

How critical is it to use the correct wire colors within the same electrical outlet?

I am replacing "razor only" receptacles to GFCI. The outlet contains a LINE cable (black, white, bare copper). The previous receptacle of course did not use three prongs, so the ground was just ...
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3answers
28k views

Is it ok to use a ground rod at a subpanel instead of a fourth wire?

I understand running the neutral wire back to the main service panel and not bonding the subpanel... but running the equipment ground back to the main panel seems to get conflicting answers. If ...
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2answers
135 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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931 views

grounded outlets and code compliance

I live in a residential unit in Oakland, CA and I am curious what the rules are about grounded outlets. Is grounded power required? My outlets are 3-prong and an outlet tester reads that there is ...
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3answers
2k views

How would I ground an internal ethernet surge protector?

I have a Cat-6 cable running to an external PoE security camera that I'd like to have surge protected, but I'm unsure how to ground the protector. It has a prong coming off that I assume is the ground ...
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1answer
2k views

How can I safely connect a subpanel in a detached garage to the main with a 3-wire connection?

This weekend I attempted to install a breaker box into a pre-wired garage. The previous owners took the breaker box with them when they moved, and since I have installed quite a few subpanels, it ...
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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 ...