Questions tagged [grounding-and-bonding]

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

Filter by
Sorted by
Tagged with
1
vote
1answer
477 views

In a pex household, would it reduce corosion to bond metal plumbing fixtures to my water heater's anode?

A water heater's sacrificial anode needs to be electrically bonded to the tank to function. This is accomplished via continuity through the threads by which it is secured. Knowing this, am I '...
5
votes
1answer
453 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 ...
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 ...
1
vote
1answer
281 views

Do I need to install another Bonding bus bar in the disconnect?

In Texas (CenterPoint Energy) from the meter can to the disconnect, I have three wires, HOT, HOT and Neutral. In the disconnect I need to connect the Neutral to the ground however the Neutral bus ...
1
vote
2answers
3k views

Voltage In Shower

I have been trying to get this issue fixed for the better part of a year now. I have had three electricians take a stab at this, and none of them were able to figure anything out. The primary shower ...
4
votes
1answer
384 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 ...
1
vote
1answer
83 views

Pool bonding, retaining wall in the way

I currently have an 24ft intex Pool. I know it doesn't have to be bonded but while the yard is torn up I am thinking it may be a good idea to run the bond wire now for when I upgrade the pool to a ...
2
votes
1answer
191 views

Separating neutral and ground in panel

I have a 200 amp combination disconnect and 10 circuit panel on the pole feeding my 200 amp panel in my house. Is the panel on my pole considered my main panel and the one in my house a sub-panel ...
1
vote
2answers
358 views

Practical advice needed on house with no earth/ground

I've just bought a 4th floor apartment in an old (1820) building in Spain. Neither my apartment, nor the building as a whole, has any earth circuit. I'm looking for practical, technical advice on ...
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 ...
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 ...
2
votes
1answer
514 views

Does the NEC permit brazing for connections to ground electrodes?

I need to connect several copper-clad ground rods together with AWG 6 solid copper wire for lightning protection, and as part of the electrical service grounding. I also need to connect some 2.5" ...
1
vote
1answer
238 views

N-G Bonding Jumper problem

I found out that my meter base has an N-G Bonding Jumper but also there is one in my service equipment main panel and also another one in the service panel for all the backyard lighting and equipment ...
2
votes
3answers
3k views

Does intex pool need to be bonded?

Im installing an intex pool 24ft by 52inches. Im reading pools over 42 inches need to be bonded. Also people are saying because of that intex pools need to be bonded. Two things, 1) the original ...
2
votes
2answers
752 views

Sub Pabel Install, NEC 250.24 question, Mixed ground/neutral at main

Did this install today on my home. How'd I do? I asked an old electrician and he said that I ought not to mix the Neutral with the Ground at the main like that cause "it could cause problems", ...
1
vote
1answer
709 views

Can ground wire be downsized mid run?

I'm planning on running some schedule 80 PVC conduit in my garage to add extra outlets. At the same time I want to ground the 2 post rack I have in my garage. A few related questions that appear ...
2
votes
2answers
2k views

Do I need to separately bond sections of copper pipe connected by push-to-connect fittings?

If I have two sections of copper pipe (water or gas) connected by a push-to-connect fitting (e.g. Shark Bite brand's push-to-connect pipe fittings), is electrical continuity preserved, or do I need to ...
1
vote
1answer
905 views

Electrical service grounding

I have a 600 amp electric service. The POCO wiring comes to a 600 amp meter, and then there are three 200 amp main disconnects that feed 3 200 amp breaker panels. The meter box and main disconnects ...
0
votes
1answer
206 views

Should I avoid ground loops in branch circuits through conduit?

I've got some outdoor conduit within which are three separate branch circuits: A general purpose, 20A outdoor receptacle circuit A 15A HVAC circuit A 40A EVSE circuit I am using NM-B for each ...
2
votes
2answers
386 views

What did cable installer use to tap onto my service ground?

I have a somewhat mysterious service ground apparently underneath a concrete entryway. All that is visible now is a heavy gauge bare copper wire coming through the cement. When the cable company ...
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
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 ...
0
votes
1answer
413 views

What does this answer about old residential home grounding mean?

If you do not have a ground wire installed with the other wires do not hook up the ground wire without knowing how the wires were carried to the box. If the house is wired with flexible metallic ...
1
vote
1answer
1k views

Chinese Breaker Box (240v split-phase?) Lacks Neutral Wires and Grounding Bus

I recently spent Chinese New Year at my girlfriend's apartment (in China) and woke up one morning to find we'd lost power. I opened the breaker box in the apartment to find the main breaker (2P 40A) ...
1
vote
1answer
380 views

What is necessary to make my old 3-wire 30-A dryer connection compliant with current code?

I have a 3-wire connection for the clothes dryer, and I would like to make it compliant with current code the simplest way consistent with reasonable safety. I haven't looked at the connection block ...
1
vote
2answers
2k views

What size equipment grounding conductor is needed for this gate lights circuit?

We live in a rural area and I am running a circuit to to our gate for a couple of post lights and maybe a receptacle. The run is 485 feet from the closest panel. I am installing THHN wire in a 1" ...
1
vote
1answer
337 views

How to handle unattached ground wires in boiler fusebox/control panel (sub-panel?)?

I don't have enough of an understanding of HVAC to know if the pictured boiler fuse box is considered a control panel or a sub-panel - but some wiring issues there lead me to needing to understand ...
0
votes
1answer
247 views

Receving 120 and 220 volt readings when testing a home outlet

I recently redid a room in my house (older home built in the 60's i believe). I decided to replace the outlets as well as they where loose and wouldn't hold plugs very well. When i pulled a few of the ...
3
votes
3answers
33k 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 ...
2
votes
1answer
4k views

How Do I Bond My Antenna to Home Electrical Ground?

I'm about to install an Over The Air (OTA) antenna as the first phase of cutting the cord. I understand the antenna and coax cable need to be grounded. I can purchase and drive a grounding rod where ...
3
votes
2answers
611 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) ...
2
votes
3answers
18k views

Existing 3 wire service feed to sub panel: bonding grounded neutral and ground bars?

I know variations of this question have been asked (the closest I could find is here), but I'm still confused. @Tester101 explained if the existing feed to the subpanel is 3 wire with a grounded ...
2
votes
1answer
781 views

How to add a surge protector on 240 circuit at pool sub panel - neutral or ground connection?

Trying to add a surge protector at a sub panel by pool. The 240 circuit runs from the main load panel on side of house to sub panel by pool - red, black and green only - to a disconnect and the pump. ...
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 ...
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 ...
1
vote
1answer
8k views

How do I test to make sure my panel is grounded correctly and all the bonding is correct?

We recently did a service panel upgrade, added a breaker that goes to the subpanel in the garage, installed two ground rods, connected the ground rod to a cold water pipe, bonded the cold-hot-gas ...
0
votes
2answers
8k 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 -...
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" @ ...
1
vote
2answers
2k views

How to size an earth continuity conductor?

For the line wires, I just check the maximum load current and select a conductor from the manufacturer datasheet that can support that maximum current. What about the earth continuity conductor ...
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 ...
0
votes
1answer
748 views

New Main Panel & Sub-Panel - Hooking up Ground / Netural - Connecting to Plumbing / Ground Bar

Older 1960's house. The outside panel is a FPE Stab-Lok that needs upgraded. Will be using this panel to upgrade it, which has a 125-amp main breaker: The current box is directly to the left of the ...
1
vote
1answer
1k views

TV antenna installation: How to ground

I'm going to be installing a TV antenna with a mast. I want to make sure I ground everything properly. As far as I can tell, I need to ground the antenna via the coax and a grounding block, and then ...
2
votes
4answers
6k views

How to properly bond metal junction box with 6 AWG conductors

What is the appropriate way to bond a metal junction box containing a receptacle wired with 6 AWG wire? It seems that most metal junction boxes have a 10-32 tapped hole to accept a ground screw but ...
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 ...
1
vote
1answer
279 views

The subpanels ground is not bonded to main panels neutral busbar

The main panel has a neutral and three ungrounded conductors entering it from the utility provider is also has a grounding rod the neutral and three conductors get transmitted from one location to the ...
2
votes
1answer
1k views

Can I use a switch to toggle the neutral bonding on a generator?

I am in the process of attaching a 2-Pole transfer switch to my breaker panel and powering it by a 7500W generator. The generator is neutral-bonded-to-ground. I understand I have to disconnect this in ...
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
53k 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 ...
0
votes
2answers
1k views

Should I bond neutral in sub panel- there is no electrical ground

I have a question about my sub panel that I'm installing in a shed in the back yard. I'm using a 3 wire feed from the main panel to the sub panel (H-H-N). ...because I'm using the 3 wire feed, I'm ...
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.