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Anonymous users2024-01-23It's not a major, but I usually cooperate with the electrical major when I do the design, and I know the basic practices, but the description may not be very professional, don't laugh.
1. The transformer should be grounded separately (grounding resistance 4), and the grounding network is generally set along the periphery of the foundation, which is required to leave according to the specification, but sometimes it cannot be done in the transformer room, and the spacing can be smaller.
2, the house lightning protection grounding can be shared with other grounding, called joint grounding, at this time the grounding resistance 1 (separate lightning protection grounding 10), when this requirement is reached, can not lead to grounding.
3. Equipotential is generally used in the bathroom, and the method is to connect a copper wire from the ground wire of the household distribution box (or welded into a network by the main reinforcement in the surrounding beam) to set up a junction box, and connect the indoor metal components to this grounding wire.
Regarding your question, I consulted a professional again, maybe all you can do now is to find a way to do a good grounding from the outside and then use flat steel to introduce it into the room and connect it to the transformer. Do not go to the grounding of the shared house, otherwise if the transformer leaks, it will affect the whole building!
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Anonymous users2024-01-22Toilet equipotential and lightning protection grounding are two different grounding systems.
Bathrooms must have equipotential boxes.
Local equipotential is not required to be connected to the down lead, but must be connected to the total equipotential. >>>More
The installation of toilet equipotential boxes implements the general junction box installation quota, and the material cost is calculated separately according to the actual situation. If the grounding wire welding to the equipotential box uses the main reinforcement in the civil ring beam, the base price of the equalizing ring laying sub-item can be multiplied by the coefficient, and if a separate flat steel or round steel is used, the quota of "indoor grounding bus laying" can be implemented. If there is a steel plate, the iron plate can be calculated according to the iron component production, installation, and calculation.
The equipotential connection between the household mori ground wire and the toilet is part of the internal lightning protection measures. When lightning strikes a building, there is a gradient in lightning transmission, and the potential difference on the metal frame nodes of the vertical adjacent layers may reach the order of 10kV, which is extremely dangerous. However, the equipotential connection connects the main reinforcement in the column of this floor, the metal frame of the building, the metal device, the electrical device, the telecommunication device, etc., to form an equipotential connection network of Xingkai, which can prevent direct lightning, induction lightning, or other forms of lightning, and avoid fire, explosion, life danger and equipment damage.
No, you misunderstood.
There is a grounding wire in the socket, why should it be connected to the equipotential terminal box, this is a superfluous move. >>>More
The bathroom equipotential terminal box is not redundant at all, but many people do not know what to use, so the general home decoration is sealed with cement. >>>More