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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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114 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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4answers
4k 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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1answer
115 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
74 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
415 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
66 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 ...
2
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1answer
101 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
231 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
22 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
54 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
592 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
55 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 ...
2
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1answer
62 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
84 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
113 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
70 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
102 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
24k 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
90 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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3answers
919 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
74 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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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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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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2answers
49 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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3answers
3k views

Can ground attached to neutral fool a receptacle tester?

I'm using a basic outlet tester like the one from picture below. Let's say someone wired the ground to the neutral in some outlet, to provide a fake ground. What would the tester report? Would it be "...
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2answers
504 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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2answers
98 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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3answers
5k views

Is it OK to create a third prong ground from a cold water pipe, for a 2-wire circuit?

When or is it NEC code compliant to upgrade a 2-wire circuit, by adding a third prong equipment ground from a nearby cold water pipe? A different case of borrowing a ground from a nearby circuit is ...
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2answers
45 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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2answers
67 views

Ground Bus Bar on Sub Panel

I was working on a house with a sub panel for a shed/workshop. The sub panel was fed off the house main panel via 2pole 50A breaker. The sub was a load center type with no main breaker. The neutral ...
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3answers
331 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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2answers
237 views

Electrical outlet installed by previous owner had Black and Green wires wired together

I've replaced dozens of outlets in my life without incident. This time, when I pulled the outlet away from the box, I found something odd. The white (neutral) wire was as it should be. But, you know ...
2
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1answer
73 views

House and shop on separate meters, will water line between the 2 be a problem?

Since my utility pole is halfway between my house and pole building (shop), there is a meter at each service entry. My (house and shop) panels are grounded properly with ground rods and subpanels are ...
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0answers
64 views

Dishwasher chassis outputting an AC voltage

I've recently noticed that touching the metal interior of my dishwasher gives me a slight tingling. I put that (stupidly) to static electricity. For "fun" I then decided to touch a finger on the ...
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0answers
56 views

How do i ground a new overhead light fixture? I'm replacing a 2 wire fixture with a new 3 wire fixture wich includes a ground wire

How do I ground a new overhead light fixture? I'm replacing a 2 wire fixture with no grounding wire with a new 3 wire fixture which includes a ground wire.
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1answer
76 views

Grounding for Outdoor Outlet

I have an outdoor outlet about 60' from my house. It is properly wired using an underground cable with ground. It is in a plastic box with plastic conduit protecting the stub-up. Recently a tree ...
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6answers
40k 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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2answers
177 views

My outlets have ground wires twisted together and bonded to the metal box, but not the outlet. Is this ok?

In my home, I've been replacing the outlets. The old ones are so loose that things don't stay plugged in! While doing this, I noticed that the ground wire(s) in every outlet are twisted together and ...
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3answers
76 views

Grounding Requirements for same structure subpanel

I understand that unless a 250.32(B) (NEC 2014) applies, a separate ground wire should run from the main to a subpanel where the service is in a separate structure. Still confused however about NEC ...
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1answer
66 views

Do lights in a circuit have to be grounded for the whole circuit to be grounded?

I have a circuit in my old house (built 1918), it’s gone through many remodels during its lifespan and multiple owners. This one circuit has no grounded outlets, so I had a look behind the outlet to ...
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3answers
128 views

Can you attach more than one wire in a given hole on a bus in an electrical panel?

Is it permissible to attach more than one neutral or ground wire to any terminal screw on the service panel bus? A home inspector says this is not allowed. THAT DOESN'T SEEM RIGHT, because all of ...
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2answers
93 views

A shorted to ground compressor can't be a pre-existing condition can it?

Our home warranty company is trying to deny our a/c claim because the technician they sent said, our compressor was 'shorted to ground.' They say that this was a pre-existing condition and that ...
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1answer
62 views

Can I use the grounding rods of a main panel as the grounding rods for my sub panel

I ran 3 #6 B/R/W and 1 #8 Grn from my main panel through 1" sch 40 PVC to my garage and will be installing a 100A sub panel with separate ground and neutral blocks. I understand that since it is a ...
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1answer
129 views

Can I use the same junction box for two appliances?

Complete noob here. I'm finishing building my kitchen and the last part - the wiring of electrical oven and glass cooking plates, is presenting me with some challenges. I am located in Germany. ...
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1answer
472 views

Strange outlet behavior

I am going to be updating electrical outlets in my house, so today I checked them all with the 3 lamp tester. Only a few are properly grounded and others not. One outlet is showing strange behavior. ...
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1answer
1k views

Japan: Can I ground a dishwasher by connecting it to a sink?

This is a question about electrical safety in Japan. I know this isn’t a Japanese forum, but my Japanese isn’t up to much, and everyone I can ask either knows nothing about electrical safety or ...
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3answers
6k views

Why don't I have ground wiring on any of my outlets?

My house in California was built in 1989 (I believe) And in the last 5 years I've replaced at least 20 outlets myself (successfully), and noticed there were never any ground wires to connect to the ...