How big is a flat bar for equipotential grounding?

Reply 6 According to the table of GB 50054-2011, the equipotential of the distribution system.

The bonding conductor may be 25mm2 copper; When the cross-section of 1 2pe wire is not less than, 25mm2 copper (or current carrying capacity) must be selected.

its equivalent of aluminum or steel); According to the table of GB 50057-2010, the equipotential connection conductor of the lightning protection system is made of 16mm2 copper, which can meet the minimum cross-section requirements of each connecting part of all lightning protection devices. Therefore, the statement that the specification of the equipotential bonding conductor of the "equipotential of the lightning protection system" is greater than that of the equipotential of the "distribution system" equipotential connecting conductor is not necessarily true.

If the PE wire is 120mm2 copper, it should not be less than 1 2 of the maximum protective conductor cross-sectional area of the distribution line, which is 60mm2 copper, but the maximum cross-section of the protective coupling conductor is 25mm2 copper, and 25mm2 copper is taken to meet the requirements. If the PE wire is 10mm2 copper, it should not be less than 1 2 of the maximum protective conductor cross-sectional area of the distribution line, which is 5mm2 copper, but the minimum cross-section of the protective coupling conductor is 6mm2 copper, and 6mm2 copper is taken to meet the requirements. That's right?

The cross-sectional area of the protective bonding conductor for the total equipotential bonding shall not be less than 1 2 of the maximum cross-sectional area of the protective bonding conductor of the distribution line, and the minimum and maximum values of the cross-sectional area of the protective bonding conductor shall conform to the provisions of the table.

There are two kinds of equipotentials to be partitioned: first, the equipotential of the distribution system; Second, the lightning protection system equipotential. The latter is larger than the former.

Bathroom equipotential grounding galvanized flat steel is generally 40 cm * 4 cm specifications.

The rolling steel mesh of the bathroom should be connected with the nearest column main reinforcement with a diameter of more than 12 steel bars, and the local large only pin equipotential box should be connected with 40 * 4 flat steel and the steel mesh about meters.

The equipotential flat steel must be reliably connected with the toilet reinforcement mesh, and the welding length meets the requirements of the specification, and then lead to the preset equipotential box, and then lead to the box when masonry.

Solution: 1. The engineering department, supervision and construction unit should carefully review the drawings, especially the large sample drawings of the construction drawings, and be familiar with the construction acceptance specifications.

2. The engineering department and the supervisor should conscientiously inspect and accept the concealed project in accordance with the requirements of the design and acceptance specifications, and supervise the implementation of rectification in a timely manner when problems are found.

3. The hydropower installation team and the civil construction team should cooperate closely, and the construction should be tracked in place at any time.

4. When the equipotential grounding trunk line is dismantled and cannot be connected with the main reinforcement, the grounding electrode shall be played nearby, and rework shall not be charged separately.

The grounding flat iron connecting the equipotential terminal box cannot be made of ordinary flat steel. Grounding flat steel in the AC electrical grounding standard specification must be used how big and must be hot-dip galvanized flat steel, the first is anti-corrosion, the second is long-lasting.

Summary. Hello, glad to answer for you. Floor equipotential grounding flat steel laying method: the buried length is not less than, and the vertical ground pole spacing spacing should not be less than 5m (according to the requirements of the local lightning protection office).

Hello, glad to answer for you. Floor equipotential grounding flat steel laying party is blind: the degree of buried long section of the land car is not less than, and the distance between vertical poles should not be less than 5m (according to the requirements of the local lightning protection office).

Hello, glad to answer for you. Basic knowledge: 1. The lightning protection grounding system is composed of three parts: the lightning receiver, the down conductor and the grounding body.

2. The lightning receiver has lightning rods, lightning protection nets, lightning belts, etc. 3. The laying method of down the lead line is divided into open and concealed. 4. The grounding device is divided into human + artificial grounding body and natural grounding body.

Requirements: 1. The material meets the specifications and the design should be required, the connection is reliable, the anti-corrosion measures are in place, the grounding tour cavity system is smooth and complete, 2. The use of building foundation steel bars to make the grounding body and down conductor connection specifications, the information is complete; The lightning protection belt and the ground wire connecting the mu are installed smoothly and beautifully, and are fixed firmly; The grounding of the roof and exposed metal components is complete; There is no omission of the metal shell of the equipment and the grounding of the equipment foundation. 3. The grounding point is clearly marked, and the lightning protection and grounding test points are complete.

4. The grounding wire lap meets the requirements.

1. Galvanized flat steel *4 sets of grounding busbar - indoor grounding bus laying, main material conversion.

2. Door and window grounding sleeve grounding jumper line - steel and aluminum window grounding.

Generally, 40 cm * 4 cm is used.

The reinforcement mesh of the bathroom should be connected with the nearest column main reinforcement with a diameter of more than 12 steel bars, and the local equipotential box should be connected with 40*4 flat steel and the reinforcement mesh for about a meter.

Extended Materials. Equipotential bonding requirements.

1. All external conductive bodies entering the building should be: lpz0a

Or. lpz0b with.

Equipotential bonding is made at the interface of the LPZ1 region. When foreign conductors, power lines.

When the communication line enters the building at different locations, it is advisable to set up a number of equipotential connection belts, and should be connected to the annular grounding body and the internal annular conductor (equalizing ring) nearby.

or such rebar. They are electrically through and connected to the grounding body, including the base grounding body.

The annular grounding body and the internal annular conductor should be connected to other shielding components such as steel bars or metal facades, and should be every other time.

5m connection once.

2. The general principle of paragraph 1 of this article shall also apply to the equipotential connection at the interface of each subsequent lightning protection zone.

All conductives, power lines, and communication lines passing through the interface of the lightning protection zone should be equipotential connected at the interface. A local equipotential connection belt should be used for equipotential connection, and other local metal objects such as various shielding structures or equipment shells should also be connected to the belt.

Clamps and surge protective devices for equipotential connections.

The passing lightning currents should be estimated separately.

3. All elevator tracks, cranes, metal floors, metal door frames, facility pipes, and cable trays.

For internal conductive objects of equal size, the equipotential connection should be connected to the nearest equipotential connection belt or other metal objects that have been equipotential connected in the shortest path, and the conductive materials should be connected to each other for many times.

4. All exposed conductive materials of an information system shall be established as an equipotential connection network. Since the equipotential connection network realized in accordance with the regulations has a connection to the earth, each equipotential connection network should not be equipped with a separate grounding device.