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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66 views

Can armored cable cross over a drain pipe?

My electrical system uses the armored cable sheathing as a ground path. I was placing some lines of AC in my walls, and I uncovered a drain pipe in the way. At first, I covered the AC with ...
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65 views

How to correctly ground long distance from main disconnect to first panel

I've got a property with an existing very sluggish electrical installation which consists of a service drop at property entrance, no main disconnect and a 130' underground run to the living space (...
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56 views

Will improved panel grounding resolve AM radio static?

I live in a manufactured house. I have two electrical panels--one outside on the electrical pole where the electrical meter is at and another one in a utility room in the house. The one on the pole ...
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2answers
322 views

Grounding Rod for Residential application

I currently live in Florida, where the soil is basically sand and clay. My question is: how should my grounding rod for my house be installed? I've managed to dig up the grounding rod that was ...
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40 views

NEMA 14 with integral JB — how can I ground it to EMT?

There are two general styles of NEMA 14 receptacle in wide use -- one is the conventionally yoked style that is used with a separate junction box in flush mount applications, but can also be used in a ...
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101 views

Could a missing ground connection in a light box disable other fixtures?

I replaced an existing outside light fixture with these security lights. I properly connected the wires together (including ground). After installing I was reading the install instructions a bit ...
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392 views

Can I ground a new light to an old metal box via a switch yoke?

All of my switches are installed in old metal boxes with no threaded ground screw holes. The boxes are wired using old cloth BX with no ground wire(grounded via casing). Some of the BX wire ...
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0answers
252 views

Why showing bad ground on my detached garage?

Everything has to be conduit by code. When i use my stop shock tester everything in the house shows no problems which is two wired. However, when those wires run from the panel box to the detached ...
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93 views

Power on disconnected ground wire

Last week I've put lights in the garden. There was already a wire coming out from a switch in the house so it was an easy job. Since there is a door at the other end of the garden I though it would be ...
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1k views

Could a loose ground wire cause an AFCI breaker to trip every 3-4 days?

I have a circuit connected to an AFCI breaker circuit breaker, which is running into our upstairs bonus room as well as upstairs guest room area. I changed out an outlet in one of the boxes, and ...
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92 views

Shared ground between two different circuits? [duplicate]

I have a 240 circuit that i am trying to split into 2 120 circuits. I have only 3 wires available, red/white/black. I have another circuit a few inches away (both in junction boxes), Can I share ...
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2answers
275 views

How should grounding be handled for multiple RV pad feeds?

Trailer pads were wired at my deer camp over 15 years ago. The main power pole has meter with 200 amp disconnect. From the meter a 3 wire service was run overhead to each pad. At the first breaker ...
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0answers
168 views

Are metal face plates safe for metal gang boxes?

So if I understand household wiring correctly: The ground prong is meant to safely conduct stray current (shorts, etc) to the ground. All outlets and switches need to be grounded to the gang box. A ...
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234 views

Has this light earthed itself?

After accidentally earthing the live wire going to the outside light whilst putting a faceplate back on (patched up now), the light has stopped working. I've just been out with a multimeter to see if ...
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1answer
732 views

How can I connect the wire that goes to the grounding rod to the grounding electrode system? [duplicate]

I'm trying to install an outdoor antenna at my parent's house and was wondering how to connect the wire that goes to the grounding rod to the grounding electrode system through the service panel when ...
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1answer
970 views

Do I need a ground for a 2-wire BX cable to a stove?

I am installing a new electric stove in a 20 year old condo. The existing BX cable has only 2 wires and both are hot legs. Do I need a ground wire or can I use the BX armor as the ground??
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1answer
797 views

Integrating into knob-and-tube wiring: okay to borrow a ground [duplicate]

I have a mixture of knob-and-tube and NM-B. If I'm extending from knob and tube, but I have a (different) an NM-B circuit nearby, is it technically allowable to ground via ground wire in the other ...
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1answer
533 views

Anything wrong with this ground wire? Is it supposed to be insulated?

Panel is from the late 1970's. Looks like there was some insulation on the ground wire, but most of it has come off. It's the same way through the crawlspace.
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3answers
6k views

Is it safe to ground a portable generator using the house ground at the service panel?

I've bought a portable generator that I'll use when the power goes out. The instructions in the paperwork state that the generator needs to be grounded before use. Can I use the house ground at the ...
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2answers
50k views

Is my circuit breaker box grounded? If not, can it be?

I recently bought a house that was built in 1960. During the inspection, I was told that the majority of outlets weren't grounded. However, it appears a few are such as in the bathroom. How do I ...
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5answers
295 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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3answers
9k views

Grounding a receptacle when there is no ground wire?

I am replacing old receptacles with new tamper-proof ones. I opened one in my basement and realized it wasn't currently grounded, the electrical housing is a real mess and has a copper "ground" wire ...
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1answer
3k views

What type and gauge ground wire do I need when using 1/0 hot and neutral wires

I have a 260 ft run from my main 225A panel to a 100A subpanel in a steel shop out in my yard. I have a #4 bare copper wire grounded to the rebar in the foundation of the shop. Not knowing what I ...
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3answers
653 views

Is this outlet grounded?

My house was built in 1949 and some of my outlets look like this guy while others run updated Romex into plastic boxes. With the wires coming through the conduit in the plaster, are these grounded ...
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2answers
93 views

Broken underground ground wire

I have underground three-strand #4 aluminum insulated from my service meter to my shop approx 500 ft. At the shop panel the volt meter with no load on either line across the lines 240V plus and from ...
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3answers
515 views

Ungrounded GFCI Outlet with 3 pronged connection

I have a GFCI outlet on top of my pergola outside that had solid 3-conductor wire ran from there to an outlet on the other side of my patio when my parents built the house. My Mom wants me to put ...
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1answer
316 views

Does 5V DC power supply require Ground wire?

I got this 5V DC 8A power supply for some 5V LED strips. For the AC input connections it has Line, Neutral, and Ground (numbers 1, 2, and 3 in attached image). My question: For the 120V AC input is ...
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3answers
46 views

verify if the Ground cable is connected to Neutral cable

I want to verify if electricity outlet is grounded. For this I did a test using a bulb connecting it to Phase and Neutral and it lit (to verify if bulb works). Then connected with Phase and Ground and ...
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2answers
57 views

Do I use all grounding screws in a metal box?

I'm wiring a 4-gang, metal box to hold multiple switches. It has 4 grounding screws. Do I need to pigtail around each of the box's grounding screws? My plan is to splice all the grounds together with ...
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2answers
82 views

Gasoline Storage [closed]

I have gasoline stored in a metal drum. The Drum is up on wooden horses. The drum is grounded with a heavy wire and connected to a copper rod into the ground. I assume a lightning strike nearby could ...
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3answers
101 views

What are the risks of improvising to use a nearby embedded metal as a local electrical ground?

I'm in India where domestic supply is 250V 50cps 1ph. My question is similar to Why does my new floodlight trip the circuit breaker?? In my case the supply does not have a ground to this particular ...
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2answers
151 views

Grounding 3 wires to electrical box with 2 ground screws

I've installed a metal electrical box. There are 3 cables coming into the box. The standard box only has 2 ground screws. My inspector said I am supposed to have 1 single ground per screw... So, how ...
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1answer
57 views

Replacement GFCI isn't working correctly

I have a bathroom outlet where the GFCI is going bad and needs replacement. There is one line and 2 cables coming in for 2 loads so there are 3 black wires, 3 white wires, and 3 ground wires coming ...
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1answer
31 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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4answers
1k views

How is a a two phase, three wire, grounding plug such as a NEMA 6-20P safe to use?

I'm looking to use a piece of commercial equipment in my home, and I've been reading about AC current and circuits. I currently have access to an old style non grounding 10-30 style plug, which I ...
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3answers
416 views

Can I safely create another 120V outlet using the fourth neutral wire from a 4 wire 240V line?

I recently just ran a 4 conductor 240 volt line out to my shed. I chose to run the extra conductor just in case, but I do not currently need it for my application. My question is, can I add a 120V ...
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3answers
78 views

Grounded Neutral Voltage Fluctuatons

BACKGROUND: Hi this is in Chicago so we use EMT Conduit as our grounding system and only use an EGC for stoves/dryers/sump pump/ etc... so I was working with my cousin to demo stuff in a basement in a ...
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2answers
68 views

2 prong to 3 prong outlet - with pigtailed grounds

I've seen a bunch of these questions and I just want to be absolutely positive that I'm doing the correct thing here. I have about 2-4 wall outlets per bedroom - all of them on 15amp breaker(s). I ...
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2answers
127 views

Do I have to add a ground wire that has been missing for 20 years?

I am replacing a 20 yr old dishwasher in a 20 yr old house. The wiring from breaker box connected to the old dishwasher had no ground wire. Can I just attach the old white & black wires to the ...
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1answer
87 views

Can neutral be used instead of ground for a tankless water heater?

A friend wants to install a tankless water heater under the kitchen sink for faster hot water and plans to use a 40A circuit near the sink that is meant for an electric range. The house was built in ...
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2answers
158 views

Can I use #12 ground wire as jumper when the other wire in the box is #14?

If everything is wired with 14 gauge romex on a 15 amp breaker, can I use 12 gauge ground as a jumper inside a box? This would be to either ground the box itself or as jumper between to outlets.
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2answers
115 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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1answer
699 views

Should I connect the ground wire to the panel when the conduit is grounded?

I ran 10/3 BX cable to my attached garage for an outlet. The BX has its own green wire for grounding, but since my home is grounded all through the conduit/outlet boxes and is bonded to the neutral in ...
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1k views

Can I strip a neutral wire and use it to pigtail ground wires?

I need to ground outlets in my house and need to pigtail the ground wires. Just wondering if I can salvage the old neutral wires, strip them, and use them to pigtail to the outlet instead of cutting ...
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2answers
345 views

EMT Grounding requirements

I'am running 2" EMT from an outside enclosure through the exterior wall into a switch room that is being attached with beam clamps, The EMT is carrying a Fiber optic cable feed to the switch room that ...
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3answers
463 views

Confusion while diagnosing an open ground

I have an outlet tester and it says the outlet in my bathroom has an open ground and I'm trying to see if I can fix this by replacing the receptacle or if the problem is elsewhere. With a voltage ...
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2answers
1k views

Does the metal receptacle box for 6-30 NEMA need to be grounded?

I have a 240 VAC portable heater with a 6-30 NEMA-style plug. I am finishing the 3rd floor of our house. I installed a sub panel fed with a 50A service using 6 AWG THHN. Installed a 30-amp 2-pole ...
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2answers
662 views

3 hots, 3 neutrals, 3 grounds; so confused

We have a 78' rancher here in Texas we just moved into and just replaced all the power receptacles/ outlets. So of them were tricky some of them were straight forward, the room was split up into two ...
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4answers
119 views

Equipment ground

I am helping family with finishing and upgrading the service to a separate garage 30ft from the house. Currently, there is 12-2 NM w/ground on a 20 amp breaker cord-capped and plugged in to a ...
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1answer
110 views

Why must all outlets share a ground conduit?

I was reading this answer in my quest to see how possible adding grounds to my existing knob and tube house would be, and was suprised by: Are you asking if it's OK to run a separate ground wire ...

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