0
Are the neutral and ground bonded in a sub-panel of an out building?
Wiki User
∙ 14y ago
The neutral and ground are only bonded in a sub-panel of an out building if the code requires a buried ground rod or plate at this location.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Where is the only place the neutral and ground wires can be on the same buss bar?
The main electric panel is where neutral is bonded to ground. There is usually a screw or strap that connects the two so the same type panel could be used as a subpanel and have the neutral and ground unbonded in subpanel.
Why do some electric panel have ground and neutral bonded together?
By National Electric Code only the Main Panel should bond ground and neutral. If subpanels have ground and neutral bonded, it could cause ground loops and shock hazards.
When wiring a 120V outlet from a 240V 3 wire service can you just connect the neutral white to the middle wire of the 240 and grab a ground from another source?
The 240 transformer that delivers power to your home has a "center tap", which gives 120 VAC to each side from the center and 240 from "hot" to "hot". It sounds like you're describing it correctly. Use the center tap and one of the hot lines to give you 120VAC, and there should be a ground bar inside the breaker panel that you would use to provide ground to the plug. The neutral and ground may or may not come from the same "source", depending on what you're trying to do. If you run a 240 feeder to a subpanel in a separate building you run two hots and a neutral and you put in a separate grounding rod to connect to the ISOLATED ground in the subpanel. The neutral and ground are not allowed to be connected together in that configuration. If you're running a 120 circuit instead, you run hot, neutral and ground together from the main panel to the subpanel.
Is the neutral bus bonded to the equipment ground in a subpanel?
Definitely not. The neutral wires must be put on the neutral buss and that is the only place that they are to be terminated in a distribution panel. In a distribution panel there is no ground buss, it is just the metal enclosure that is used. The ground wire is only used to return a system fault back to the distribution panel to trip that circuits breaker.Distribution panels typically have two "busses"-- one for ground and one for neutral. These are terminal strips where the ground and neutral wires are connected. In some panels, these busses are electrically connected or "bonded." In other panels they are isolated. Most panels come with an optional "bonding screw" that can be installed or removed depending on whether the busses need to be connected. NEC is very specific on when these busses are to be connected. Ground and neutral busses should only be bonded at the main panel where the service enters the building. Other distribution panels will have separate ground and neutral busses and they should be isolated electrically--connecting these is a commonly seen mistake.I believe the question refers to the case where the two busses are properly bonded together, so are electrically equivalent. Then is it acceptable to have some ground wires on the neutral bus and vice-versa. Electrically it will work, but code or electrical inspectors may deem it to be confusing or sloppy practice and reject the installation.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
In a home circuit are the neutral and ground bare wires always connected?
They are always connected, but at one and only one place, the service entrance. For instance, if you are adding a subpanel to an existing house, the subpanel will probably come with the ground bus and the neutral bus tied together with a special bonding screw. To be legal, you must remove this screw, isolating the neutral from ground. The house's main panel still has the bonding screw or jumper in place, and remains the only place the connection is made.
Where is the only place the neutral and ground wires can be on the same buss bar?
The main electric panel is where neutral is bonded to ground. There is usually a screw or strap that connects the two so the same type panel could be used as a subpanel and have the neutral and ground unbonded in subpanel.
Do you need a grounding rod at a subpanel on a detached building?
Yes. The panel must be grounded with its own grounding rod. The ground will not be provided with the feeders to the panel, these will only contain your phase wires and neutral. Also make sure that any subpanel installed does not have the neutral bonded to ground. This should only be done at the main panel where the electrical utility service is connected.
Why do some electric panel have ground and neutral bonded together?
By National Electric Code only the Main Panel should bond ground and neutral. If subpanels have ground and neutral bonded, it could cause ground loops and shock hazards.
What besides the neutral system should be bonded to the ground?
Answer for USA, Canada and countries running a 60 Hertz supply service.Nothing but the neutral bus should be bonded to the ground electrode.
Why isn't there a ground in a junction box?
Only the main panel is grounded directly because if you ground each junction box of subpanel ground loop current paths are possible that can cause shock hazards. The ground rod is connected to main panel and the neutral is bonded to that ground as is the ground wire. The neutral and ground wire are then run to all circuits, junction boxes and subpanels throughout the house. If you tie neutral and ground together at any point in the house, other than the main panel ground loops can exist and cause shocks.
When wiring a 120V outlet from a 240V 3 wire service can you just connect the neutral white to the middle wire of the 240 and grab a ground from another source?
The 240 transformer that delivers power to your home has a "center tap", which gives 120 VAC to each side from the center and 240 from "hot" to "hot". It sounds like you're describing it correctly. Use the center tap and one of the hot lines to give you 120VAC, and there should be a ground bar inside the breaker panel that you would use to provide ground to the plug. The neutral and ground may or may not come from the same "source", depending on what you're trying to do. If you run a 240 feeder to a subpanel in a separate building you run two hots and a neutral and you put in a separate grounding rod to connect to the ISOLATED ground in the subpanel. The neutral and ground are not allowed to be connected together in that configuration. If you're running a 120 circuit instead, you run hot, neutral and ground together from the main panel to the subpanel.
Is the neutral bus bonded to the equipment ground in a subpanel?
Definitely not. The neutral wires must be put on the neutral buss and that is the only place that they are to be terminated in a distribution panel. In a distribution panel there is no ground buss, it is just the metal enclosure that is used. The ground wire is only used to return a system fault back to the distribution panel to trip that circuits breaker.Distribution panels typically have two "busses"-- one for ground and one for neutral. These are terminal strips where the ground and neutral wires are connected. In some panels, these busses are electrically connected or "bonded." In other panels they are isolated. Most panels come with an optional "bonding screw" that can be installed or removed depending on whether the busses need to be connected. NEC is very specific on when these busses are to be connected. Ground and neutral busses should only be bonded at the main panel where the service enters the building. Other distribution panels will have separate ground and neutral busses and they should be isolated electrically--connecting these is a commonly seen mistake.I believe the question refers to the case where the two busses are properly bonded together, so are electrically equivalent. Then is it acceptable to have some ground wires on the neutral bus and vice-versa. Electrically it will work, but code or electrical inspectors may deem it to be confusing or sloppy practice and reject the installation.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
In a home circuit are the neutral and ground bare wires always connected?
They are always connected, but at one and only one place, the service entrance. For instance, if you are adding a subpanel to an existing house, the subpanel will probably come with the ground bus and the neutral bus tied together with a special bonding screw. To be legal, you must remove this screw, isolating the neutral from ground. The house's main panel still has the bonding screw or jumper in place, and remains the only place the connection is made.
How can you tell if the ground wire is approriately bonded to the neutral and the cabinet at the service box?
Ground wire can be appropriately bonded to the neutral and cabinet at the service box by connecting the neutral and ground wires from the feeder wires to the neutral bus bar and the ground terminal located on the same cabinet at the service box. White wire (neutral) must be connected to bus bar and bare wire must be connected to ground terminal in the same cabinet.
Where are neutral and ground wires usually bonded together?
Only in the main electric panel.
Why can't the ground wire be connected to neutral at the receptacle instead of in the main panel?
First off, this is for a single phase 120/240V system only. The ground and neutral can be bonded at the receptacle but not instead of bonding them at the panel.You should always have them bonded together at the panel in a single phase 120/240V system. Otherwise you risk having a floating neutral in your system.
Why are the GFCI breakers nuisance tripping in your 100 amp sub panel- is it because neutral bonded to ground?
It may be the GFCI breaker is defective. Make sure it is wired correctly. Neutral to neutral bar and ground to ground bar.
