There is no isolation measure between the cable and the steel structure; 3
.
Fig
.
Copyright statement: this wechat content comes from health, safety and environmental protection assistant
.
The connection method between the grounding wire and the vertical grounding body can be welding, crimping or bolt connection
.
The PE line is not connected ﹣ 7
.
No enclosure grounding
.
The insulation shall be used between the cable and the bracket for reliable isolation, and the binding wire shall be insulated
.
The cable is directly laid on the steel beam; refer to GB 50484-4.3.5
.
The knife switch does not meet the requirements of safe electricity use
.
4.4.4 the electric equipment shall implement the regulation of “one machine, one switch and one protection”
.
The plug of civil socket is used ﹣ 5
.
Power line is directly connected with tungsten iodide lamp tube ﹣ 2
.
The use of rebar as grounding electrode
.
2
.
There is no main switch in the wiring
.
The official account of building engineering is recommended by the following code.
.
3
.
The right knife switch lacks a protective cover, and the left knife switch wiring does not meet the specification requirements
.
7 1
.
The cable is fixed with iron wire; 2
.
The PE line uses additional line, and the strength is not enough when dragging the cable
.
The plug-in panel in the above picture is not suitable for construction site ﹣ reference standard: temporary electrical equipment shall be inspected and tested, and can only be used after it is confirmed to be qualified and marked
.
Reference standard: GB 50484-4.3.8 when the cable crosses the road, solid protective pipe shall be used, the pipe diameter shall not be less than 1.5 times of the outer diameter of the cable, and the pipe orifice shall be sealed
.
The wiring on the left side is unreasonable and does not meet the wiring requirements
.
Use of civil plug-in panel 2
.
Reference standard: when the cable crosses the road, the solid protective pipe shall be used, and the pipe diameter shall not be less than 1.5 times of the outer diameter of the cable, and the pipe orifice shall be sealed
.
Fig
.
No rain proof measures, no distribution box, and put it directly on the ground
.
3
.
It is strictly forbidden to control two or more electric equipment (lines) with one switch
.
It is strictly forbidden to control two or more electrical equipment (lines) with one switch
.
8 1
.
The main line in the distribution box is disordered and paralleled
.
Reference standard: GB 50484-4.5.14
.
Reference standard: cable joints shall be insulated and wrapped, and rain proof and protection measures shall be taken
.
There is no PE line connection point 8
.
2 1
.
2
.
The main leakage protection is multi connected ﹣ 6
.
The main leakage protection is not controlled
.
The main reason is that the copper piece is exposed
.
The branch leakage protection is lack of isolating switch ﹣ 4
.
3
.
The reference standard of non PE line is GB 50484-4.4.4
.
The skin of primary line of welding machine is damaged
.
4.4.9 the external structure shall be rainproof
.
2
.
Fig
.
Opening one switch and multiple connections
.
Figure 1 1
.
The motor lacks rain proof cover and no insulation measures
.
4
.
4
.
Reference standard: GB 50484-4.4.2 the distribution box shall be equipped with main isolator, main circuit breaker, shunt isolator and shunt leakage circuit breaker
.
Fig
.
2
.
Fig
.
4
.
6 1
.
Lack of leakage protector on plug-in panel 3
.
Figure 10 1
.
The copyright belongs to the original author
.
The three phase wires are directly wound together with the motor wires and are not fixed firmly
.
4.4.4 the electric equipment shall implement the regulation of “one machine, one switch and one protection”
.
2
.
The main leakage protection is lack of isolating switch ﹣ 3
.
3
.
Cable joints shall not be set underground
.
Spark spot on civil plug-in panel 4
.
Lawn lamp is fixed on angle steel with iron wire without insulation measures ﹣ reference standard: jgj46-10.3.5 the installation height of tungsten iodide lamp, sodium, thallium, indium and other metal halide lamps should be more than 3M, and the lamp wire should be fixed on the terminal, not close to the surface of lamps
.
The door plate of distribution box is damaged ﹣ 2
.
5
.
Fig
.
Reference standard of grounding electrode: jgj46-5.3.4 Fig
.
6 The insulation board of the distribution board is not bakelite board 7
.
The grounding wire of electric welding machine is not fixed
.
The cable is erected off the ground or buried for protection
.
4 1
.
The color of the grounding wire does not meet the requirements of the land use
.
9 1
.
The grounding wire is not PE line
.
The branch leakage protection ﹣ 8 Shunt leakage circuit breaker
.
The electrical equipment shall implement the regulation of “one machine, one switch, one protection”
.
4.4.9 the external structure shall be rainproof
.
If the copyright of the work is involved, please contact us
.
Cable without road protection 2
.
The bolt connection shall be galvanized bolt with galvanized flat pad and spring pad, and the bolt shall not be buried under the ground
.
Foundation pit without protection 3
.
The vertical grounding body shall be angle steel, steel pipe or round steel
.
It does not meet the requirements of one machine, one switch and one protection
.
The overall distribution board does not meet the requirements and is scrapped
.
5 1
.
3 1
.
Fig
.
Steel plate pressed on cable line 3
.
According to the provisions of GB 50054-1995, the copper core of the knife switch is exposed and shall not be used in industry
.
We will negotiate the copyright issue or delete the content as soon as possible! This is the original author’s personal view, which does not mean that the official account agrees with his views and is responsible for his authenticity
.
