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2. Each protective earthing or protective zero point of electrical equipment must be connected to the grounding mains (or protective neutral) with a separate ground (zero) line. It is strictly forbidden to use the earth as the work zero line, and it is not allowed to borrow the machinery itself for the work zero line.
3. It is strictly forbidden to carry out electrical maintenance by live working or by using scheduled power transmission. Before the inspection, the power must be cut off and the warning sign "No closing, some people working" should be hung on the power switch. The warning card should be hanged and taken by a person.
4. During mechanical operation, it is strictly forbidden to touch the rotating parts and carry out maintenance.
5. During operation or operation of the equipment, no person shall be allowed to ride or stand anywhere except outside the cab.
6. Persons are prohibited from staying, working or passing under the lifting equipment. It is strictly forbidden to hoist the air for a long time. In case of sudden power failure during lifting operation, all controllers should be turned to zero position, the main power switch should be disconnected, and measures should be taken to lower the weight to the ground.
Second, electrical equipment operation (A) electrical lines and explosion-proof electrical equipment in explosive places 1. Electrical lines Electrical lines in explosion-hazardous places should be laid in areas with less danger, and avoid all kinds of possible injuries. The rated voltage of the low-voltage cable and the insulated conductor to be laid shall not be lower than 500V, and there shall be sufficient sufficient current carrying capacity, and the conductor cross-section shall meet the minimum allowable value. The line shall not have intermediate joints in the explosion hazardous area; the overhead lines shall not be crossed in the explosion hazardous area and shall be kept at a considerable distance from the boundary; the wiring in the explosion place shall strictly comply with the corresponding requirements.
Grounding protection of lines and equipment in explosive hazardous areas should use high-sensitivity leakage relays or leakage switches. The grounding resistance should be strictly guaranteed according to requirements, and lightning protection grounding and anti-static grounding should be strictly implemented.
2. Electrical explosion-proof Explosion-proof electrical equipment used in explosive hazardous areas must have an inspection certificate issued by the relevant national authorities and have obvious permanent explosion-proof marks. Explosion-proof electrical equipment grades should be consistent with the classification of explosive hazardous locations.
Explosion-proof equipment is divided into two categories: Class 1 is mining electrical equipment, suitable for explosive environment containing A-burn 1 compound; Class II is explosion-proof electrical equipment for factories, suitable for various explosives except for nails Mixture environment. Commonly used at coal mine explosion-proof electrical equipment have flameproof, increased safety, intrinsically safe, explosion-proof battery locomotive is usually a special type. See Table 1G420116 for the various types of markings for explosion-proof electrical equipment. 
3. Safety management of explosion-proof electrical equipment Explosion-proof electrical equipment shall be operated, operated and maintained according to the technical conditions of the products specified by the manufacturer. The protection devices, locking devices, monitoring, indicating devices, etc. on the equipment shall not be arbitrarily removed.
When checking the equipment, it is forbidden to release the protection, interlock and signal; it is forbidden to forcibly send power after the power failure; it is forbidden to electrify the power line outside the explosion-proof equipment; it is forbidden to use tools that can generate sparks. Power should be cut off when cleaning the inside of the equipment. Only when the internal conditions of the equipment are met, the power can be sent.
Explosion-proof electrical equipment should have daily operation and maintenance inspections, regular inspections, and overhauls. Through the daily operation and maintenance inspection, the abnormal phenomena that may occur in the equipment are found in time; the regular inspection focuses on ensuring the explosion-proof performance of the equipment. Overhaul of explosion-proof electrical equipment should be carried out at the designated professional repair unit.
The safety technical department of the upper level and the safety technical department of the unit shall organize the leading cadres and employees at all levels related to the electrical safety of the explosion hazardous area to carry out the training of the basic knowledge of electrical safety regulations and management.
(2) Electrical safety signs Electrical safety signs are an important factor in ensuring the safety of electricity. If the color of the wire is unknown, the fire wire will be connected to the device casing, causing the operator to get an electric shock or even death.
Electrical safety signs are divided into color signs and graphic signs. The color mark is used to mark the electrical materials of different natures or uses, or the safety level of the marked area; the graphic mark is used to warn.
1. Prohibition signs. Used to stop certain dangerous actions. Such as "prohibited start", "forbidden inside", "no lock, some work".
2. Warning sign. Used to alert and take care to avoid danger. Such as "beware of electric shock", "beware of high voltage", "beware of cable" and so on.
3. Instruction mark. Used to indicate the rules that people must follow. Such as "must wear insulated shoes", "must wear anti-static clothing" and so on.
4. Prompt sign. Indicates the direction of safety objectives and safety measures. Such as "safe channel direction", "grounded" and so on.
III. Electromechanical safety accident prevention measures 1. When inspecting, repairing, installing, or moving mechanical and electrical equipment, it is forbidden to carry out live work, and must follow the order of electricity inspection, discharge, and sealing (installation of short-circuit ground wire).
2. When working in high-voltage electrical work, i must have more than 2 people working. When operating high-voltage equipment, one person should be supervised, one person should operate, and the power transmission system should be strictly implemented.
3. The mining work surface cable, lighting signal line and pipeline shall be hung in accordance with the “Safety Regulations for Coal Minesâ€. The cable in use is not allowed to have chicken claws, sheep tails, and bright joints. Strengthen the protection and inspection of moving cables for mining equipment to avoid crushing, impact and shelling. After the damage is discovered, it should be disposed of in time.
4. When constructing in a wired location or loading or unloading materials from a mine car, power off first; when the power cannot be cut off, the long handle tool should be flat and flat, and the wire should not be touched during operation to prevent electric shock.
4. Precautions when repairing electrical equipment 1. Before the electrical maintenance work, check and check the tools, instruments, parts and materials that should be brought in, and check whether the electroscope is sensitive and reliable.
2. When inspecting, repairing, installing, or moving the electromechanical equipment, it is forbidden to carry out the work. It must be in the order of electricity inspection, discharge, and sealing (fixing the short-circuit ground).
3. When working in high-voltage electrical work, there must be more than 2 people working. When operating high-voltage equipment, one person should be supervised, one person should operate, and the power transmission system should be strictly implemented.
4. When multiple people working in the same power supply system and the same control system must pay attention to each other's influence and mutual safety. Locations that affect the safety of others due to power outages shall be implemented in accordance with the following provisions:
(1) Generally, it is not allowed to work at the same time. When multiple operations are required on the line of power outage, the power outage procedure should be handled separately.
(2) When working at the same time, it is necessary to suspend the power card separately, and designate a special contact to be responsible for contacting the progress of each relevant work link. All the links are completed and the personnel can be powered off after evacuation.
5. After the leakage detection relay trips, the cause of the trip and the nature of the fault should be ascertained, and the power can be sent only after being removed in time. It is forbidden to forcibly send power to the power supply system when the leakage detection relay is removed.
6. Any switch that may reverse the power transmission must be locked, and the "Caution against electricity" warning sign is hung on the switch. When reverse power is required, reliable safety measures should be taken to prevent electric shock and damage to equipment. Major Parts of Injection Machine
Auxiliary Equipment
Prevention of mine electrical and mechanical safety accidents
First, the use of machinery and electrical equipment 1. Mechanical use must be in accordance with the performance, load capacity and conditions of use specified in the factory manual, correct operation, reasonable use, no overload or arbitrarily expand the scope of use.