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Why are the neutral and ground bonded at the main panel?
The reason the neutral and ground are separate other than at the main panel is to prevent a parallel ground path. The power received from the power company (in the US is 240VAC) This is derived from a step down transformer close to you home.
Why there is a voltage between neutral and earthing?
Neutral-to-earth voltage (N-E), sometimes called “stray voltage,” is a condition that results when an electrical current flows through a neutral conductor. Stray voltage occurs when electricity “leaks” from the black wire directly to the white or ground wires before passing through the device to be powered.
Can neutral and ground be connected together in panel?
The only place the neutral and ground can be together is at the service panel (your disconnect outside). The neutral and ground must be isoloated (floating) in a sub panel. There are countless threads on this subject throughout this mb. The feeder conductor should be the same size as the service conductors.
Why is neutral not connected to earth ground?
If you go to your main panel and remove the bond between ground and neutral, you have just created a system with a floating neutral, that is, a neutral that has no reference to earth ground. On the plus side, now you have a system where a ground fault (a specific type of short where the hot wire touches something grounded) does not trip a breaker.
Why are ground and neutral wires bonded together in sub-panels?
One of the most common defects I find related to remote distribution panels (sub-panels) is ground wires and neutral wires bonded together. This is especially true if the work has been done by homeowners or handy persons. In simple terms, the only place we want to bond the grounds and neutrals together is in the service equipment.
Where do you bond grounds and neutrals together?
This is especially true if the work has been done by homeowners or handy persons. In simple terms, the only place we want to bond the grounds and neutrals together is in the service equipment. Many people refer to it as the “main panel” or a variety of other terms.
How is a house connected to a substation?
Your first paragraph summarises it well : each house gets a phase and neutral, and the neutral is grounded at the substation. In this system, the ground at your house is isolated from neutral, not connected to it, and thus carries relatively little current.