Questions tagged [grounding-and-bonding]

For questions dealing with grounding and bonding of electrical installations, and the specific requirements of such.

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28
votes
5answers
45k views

Is it OK to borrow a ground wire from a different circuit?

I've got a circuit in the basement carrying a handful of outlets. This circuit has no ground wire. I want to add a couple of outlets and want them to be grounded. I may even want gfci outlets on ...
19
votes
3answers
7k 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 ...
15
votes
1answer
3k views

Is this box bonded properly to the ground?

The receptacle is from the mid-1950's and my multimeter shows that it is grounded. There are a solid 120 volts when testing between live and ground. I noticed a bare copper wire coming from the cloth ...
12
votes
3answers
4k 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 "...
10
votes
3answers
1k views

Are the grounds and neutrals in this electrical subpanel reversed?

I would appreciate your feed back to help me understand the logic behind Bonding the Neutral and Isolating Ground as shown in the attached pics. Subject sub panel is dedicated to one of four ...
7
votes
2answers
54k 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 ...
7
votes
2answers
600 views

Sub panel install issue

I had a sub panel installed recently. The plan was that i will be installing my own breakers. The sub is running off of the main about 25 feet away in my garage. I understand that the ground and ...
7
votes
4answers
15k views

How do you ground residential network equipment?

I needed to run some Cat5e UTP network cables and decided to add network outlets to most rooms, run new phone wiring and RG6 as well. Much of what I've seen and read about residential and small ...
7
votes
2answers
2k views

Can cold bond be connected to ground rod?

I am updating the main breaker box and want to sure everything is done properly according to the NEC. Can I run one ground wire (4) from the panel to the grounding rod and then another wire (4) from ...
7
votes
2answers
1k views

Bonding Ground Rod for Rooftop Antenna

I am installing a rooftop antenna on the end of my house, opposite the end where the ground rod is located. I plan to install a new 8' ground rod on the ground directly under the antenna. I need to ...
7
votes
2answers
835 views

How should this circuit be properly grounded?

I am hiring an electrician to do the work so my question is more for my education and helping me ask the proper questions to the perspective contractors. Purchased a condo recently and want to put in ...
6
votes
1answer
4k views

Is there a reason to prefer bare wire for Grounding Electrode Conductor?

Is there a reason I should use bare copper instead of THWN for a grounding electrode conductor (e.g. bonding water pipes and ground rods; not an equipment grounding conductor)? I cannot find anywhere ...
5
votes
3answers
761 views

Is my main panel improperly bonded?

My house was built in 1975 and I pretty obviously have a "Rule of 6" GE main panel (the meter is above this) My father-in-law (who has taught me a great many DIY things) swears that the ...
5
votes
2answers
543 views

Replacing subpanel that was fed with 3 wires

A contractor replaced my subpanel with a new one, and will come back for other work and inspection. (Old subpanel is Federal Pacific.) My home is in California, built in early 1980s. The subpanel is ...
5
votes
3answers
10k views

What can I do about a severed grounding wire?

After doing some yard cleanup, I realized that my panel ground wire was severed. I went to Home Depot and was told that they only carried a temporary solution (see attached photo) and that I should ...
5
votes
2answers
1k views

What are the grounding requirements for a panel fed from another panel?

I have a 60 amp subpanel in my garage and plan to add a second 30 amp subpanel to an out-building 130 ft away (fed from the 60 amp). I Plan to run 6 AWG 4-wire from the 60 amp to the 30 amp in 1 1/2 ...
5
votes
3answers
4k views

Mild Electric Shocks in Bathroom

I have been subject to mild electric shocks in my bathroom for years. It's probably a good time to figure out the problem (I'm still here), so I have check the voltage across the shower valve and the ...
5
votes
1answer
1k views

Grounding tv antenna in attic?

I know this question has been raised all over the internet, with a variety of responses, but here is my specific situation: I purchased this antenna and plan to mount it in my attic. I have an indoor ...
5
votes
2answers
4k views

Grounding 200A Main Panel with Changes to Water & Gas

Going through an extensive DIY remodel of a "total electric" 60's town-home in Texas. EXISTING is 200A main panel with neutral bonded to ground consisting of #6 bare solid Cu to cold feed Cu pipe on ...
5
votes
1answer
454 views

How are sacrificial anodes electrically bonded to the water heater?

I was thinking about the sacrificial anode in my hot water heater. It screws in via a hole on the top of the unit. Every time I've made a threaded plumbing connection, I wrap Teflon around the ...
5
votes
2answers
1k views

Bonding new ground wire from ground rod to exsiting house grounding block

I am installing a new external TV antenna on the back of my house. The house grounding block is about 100 ft away from the new antenna, around the other side of the house. There is an existing ...
5
votes
1answer
9k views

Adding second ground rod. Is this an acceptable way of bonding?

I recently found out that our sole ground rod is only 4 feet long. That said, I want to add a properly-sized ground rod to "improve" the grounding system and hopefully comply properly with the ...
5
votes
2answers
1k views

Can two ground rods be bonded via a PVC conduit above ground?

According to my understanding, if a supplementary ground rod is installed, it must be bonded to the existing rod via a buried 6 AWG cable (NFPA 70). However, because virtually every side of my house ...
4
votes
2answers
7k views

Why was the ground for this fluorescent fixture not connected to the ballast?

I just purchased a set of fluorescent fixtures that are fitted with a plug to connect to a standard 3-prong receptacle. My intention is to replace the plug with Romex cable, and wire the fixture ...
4
votes
2answers
7k views

Why do we need bonding at the gas water heater?

We recently upgraded our electric service...had to put in a new panel, etc. The city inspector came by and said that everything looked good except that we still need to "Bond Hot-Cold-Gas with #6" @ ...
4
votes
2answers
79k views

Is it okay to not connect the grounding wire to a ceiling box?

Is it ok to connect the ground wire of a new light/fan fixture to the ground wire of the house without connecting them to the ground screw in the outlet box? The new ceiling fan/light had a ...
4
votes
2answers
2k views

GE Powermark Electrical Panel - What Did the Last Guy Do?

Basically, I want to do two things - add two dedicated circuits for the garage shop and add a 50 amp 240 breaker for my welder. I've been reading for days about what is going on inside my panel (GE ...
4
votes
1answer
386 views

Should I connect one or both Ufer grounds to my panel?

Local code requires the use of a Ufer ground (concrete-encased electrode) as a ground rod system for new construction. There are two electrodes in my construction. My question is: do I connect both ...
3
votes
3answers
12k views

How do I ground my replacement outside porch light?

I am attempting to replace an outside porch light. After removing the old light, I found the metal electrial box had the ground supply attached to a screw. The new light has a green ground wire and I ...
3
votes
2answers
156 views

Mixed conduit grounding code

I'm running a few outlets to my basement from the main panel on the first floor. Since it is a garage, sealed 3/4" pvc conduit runs through the concrete into the basement. This connects to a ...
3
votes
2answers
295 views

Bonding CSST to electrical ground system

I had a licensed natural gas tech/plumber install a new branch line using CSST to a new fireplace. When I am asked him about bonding it, he said he had never heard of that before. From everything ...
3
votes
2answers
5k views

200amps service - ground rods instead of pipe connection

I upgraded my main circuit breaker today from 150amps to 200amps. See my previous posts here on the same project: Is RC2040M150CH MSP upgradable to 200amps main circuit breaker Neutral on main ...
3
votes
7answers
65k 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 ...
3
votes
2answers
9k views

Can I drive a ground rod near a gas meter?

I am redoing the electrical in my 1940s house. The house has no grounding electrodes but the meter and panel are grounded to my water pipe outside in the front of the house. (This actually looks like ...
3
votes
3answers
2k views

Replacing grounded outlets with grounded metal junction box

Replacing several 3 prong outlets in my 1968 home. Tried searching to find an answer but most questions seem geared towards replacing 2 prong outlets with 3 prong and don't apply here. My wiring ...
3
votes
3answers
34k views

House wiring and grounding. How do you retrofit an old house and ground it?

A contractor looked at our house and told me that you can't fix a house (with old wiring) that has some outlets that are not grounded. He said that you can go on YouTube and search the internet and ...
3
votes
2answers
23k views

Do I need to ground my above ground pool / with saltwater system?

I just bought a 21'x52" above ground pool. I am going to use a saltwater system with it. Do I need to ground this pool ?
3
votes
1answer
69 views

Is this grounding configuration correct?

While doing work in my breaker panels I noticed the following: 300A service enters into a large box on the right where it is split to a 200A and a 100A panel. Neutral and ground are bonded in the ...
3
votes
1answer
169 views

Understanding ground to earth and neutral, trying to make my home safe

I've been reading for hours and still confused in regards to my situation. I'm trying to improve electrical safety in my house, especially with a growing family. Any help would be great. I'm in ...
3
votes
2answers
1k views

How can I connect a new ground rod?

Illinois house, built 1963. Not sure if there is a ground rod or just the water pipes used for ground. Want to put in another/first rod. Can I connect it to the clamp on the electrical meter housing ...
3
votes
3answers
3k views

Can I use Schedule 40 PVC to protect a grounding electrode conductor where exposed to physical damage?

Can I use Schedule 40 PVC to protect a 4 AWG grounding electrode conductor (wire from main panel to grounding electrode) where exposed to physical damage (a few feet between the panel and the ground ...
3
votes
2answers
1k views

Why didn't homeowners get electrocuted when appliances were grounded through the neutral?

I read that appliance at certain times in the U.S. (for example stoves) were grounded through the neutral wire. Since the neutral wire carries current does this means the case of the stove itself is ...
3
votes
1answer
42 views

Neutral-Ground bonding with generator (no utility power)

I've been doing plenty of searching around the internet, but cannot find anything for my specific scenario. Any help or advice would be greatly appreciated. I would like to install a breaker panel at ...
3
votes
2answers
614 views

How does a water meter affect the continuity of a grounding electrode system when a jumper is present?

250.53(D)(1) Continuity. Continuity of the grounding path or the bonding connection to interior piping shall not rely on water meters or filtering devices and similar equipment. 250.68(C) ...
3
votes
2answers
51k views

What size conductor do I need to bond water and gas piping? [duplicate]

What is minimum size ground do I need for a 200 amp panel? I need to bond the hot and cold in the water heater and already have a ground rod in the ground. I also need to bond the water and gas.
3
votes
2answers
217 views

If i use one ground wire for two outlets, will my equipment get damaged?

If i use one ground wire for two outlets, will my equipment get damaged? Here is what I want to do: If my air conditioner sends voltage through the ground wire shared with the outlet powering my ...
2
votes
3answers
3k views

2 load centers under 1 meter: do you need bonding and main breakers at both?

Here's my layout as it stands: meter | 200A disconnect, neutral and ground bonded | | | mobile home main panel (200A main breaker, neutral and ground not bonded) I would like to run another 100A ...
2
votes
2answers
2k views

Is it bad to have multiple grounding electrodes?

I think this question gets close to answering my question, but I am not quite sure. I have a detached structure, powered by a feeder from the main panel where the ground and neutral are bonded. The ...
2
votes
3answers
4k views

Do I have to connect the grounding electrode at a detached garage to the grounding electrode at the main structure?

Article 250.32(A) of the National Electrical Code, tells us that we need a grounding electrode at a detached garage. It also says that it has to be "installed in accordance with Part III of ...
2
votes
2answers
96 views

Can I use the metal cladding of a cable as ground for this range installation?

I have a pre-existing #6-3 cable (without ground) with metal cladding on a 50-A two-pole circuit that was wired into a range. As shown in the photo, this cable has only black, red, and white ...