Measures for safe use of electricity at the hottes

Measures for safe use of electricity at the construction site 1. Technical measures for safe use of electricity 1. The temporary use of electricity at the construction site adopts the three-phase five wire system, and the metal shell of electrical equipment must be connected to the special protective zero line

2. All cable trunks use 5-core special cables, which are laid underground or overhead

3. Indoor wiring must use insulated wires and porcelain bottles. When porcelain clamps are used, the distance from the ground shall not be less than 2.4m, and the outdoor distance shall be higher than 3m

4. The distribution system is equipped with general distribution box, distribution box and switch box to implement hierarchical distribution

5. Each electric equipment has its own special distribution box, and strictly implement the system of one machine, one box and one switch

6. A leakage protector must be installed in the switch box. The rated leakage action current of the leakage protector in the switch box should not be greater than 30mA, and the rated leakage action time should not be greater than 0.1s

7. When working in damp and pits, use class III hand-held electric tools, set the switch box of leakage protector outside, and assign special personnel to monitor during work

8. All distribution boxes and switch boxes shall be inspected and repaired once a month. The inspection and maintenance personnel must be professional electricians. During the inspection, insulating shoes and gloves must be worn as required, and electrician insulating tools must be used

9. All distribution boxes and switch boxes must be operated in accordance with the following sequence

power transmission operation sequence: main distribution box, distribution box, switch box

power failure operation sequence: switch box, distribution box, main distribution box (except for electrical failure and emergency)

10. When the construction site stops working for more than one hour, the power switch box should be powered off and locked

11. Patrol, inspect, maintain and register all electrical equipment on the construction site on time

II. Fire prevention measures for electricity use at the construction site

1. According to the policy of giving priority to prevention and combining prevention with fire fighting, we should provide guidance for safe electricity use and education on electrical fire prevention for all types of work

2. Insulated wires must be used for indoor wiring, and lamps shall not be less than 2.4m. Electric blankets, hot fast and electric stoves are strictly prohibited in the dormitory

3. Use low-voltage lighting in the warehouse, and keep inflammables and explosives away from the distribution line

4. Inflammables and explosives shall not be stacked at the welding site

5. No sundries shall be placed in the switch box and distribution box at the construction site

6. Lightning protection and grounding devices shall be provided for overhead lines at the construction site

7. Equip with special fire extinguishers to put out fires in time

III. power consumption measures for using hand-held electric tools

1. The selected electric construction machinery, hand-held electric tools and power safety devices comply with the corresponding national standards, professional standards and safety technical regulations, and have the product certificate and the operation of using the ★ software system to realize the level 3 user management instructions

2. Establish and implement the responsibility system of special personnel and special aircraft, and conduct regular inspection and maintenance

3. When using hand-held electric tools in general places, leakage protectors with rated action current not greater than 15mA and rated leakage action time not greater than 0.1s should be installed

4. When operating in open air, wet places or on metal frames, class II hand-held electric tools must be selected, and splash proof leakage protectors must be installed

5. When used in narrow places, metal containers, pits and culverts, class III hand-held electric tools should be selected, and the leakage protector device should be set outside the narrow places, and there should be someone to monitor when working

6. The load line of hand-held electric tools must adopt weather resistant rubber sheathed copper core flexible cable, and there shall be no joints

7. The shell, handle, load line, plug, switch, etc. of hand-held electric tools must be intact. They must be checked without load before use and can be used only after they operate normally

8. Operators must wear insulated shoes and gloves

IV. technical measures for safe use of electricity of ramming machinery

1. Ramming machinery must be equipped with splash proof leakage protector, and its rated leakage action current is not more than 1. In order to fully realize the safety and smooth opening of phase 2 project, the electro-hydraulic servo universal testing machine for static testing of different materials sounded the charge signal 5mA, and the rated leakage action time is not more than 0.1s

2. The load line of ramming machine adopts weather resistant rubber sheathed copper core flexible cable

3. When using ramming machines, insulating supplies must be worn as required, and special personnel must be assigned to adjust the cable. The length of the cable is not more than 50m, and it is strictly forbidden to wind, twist and be crossed by ramming machines. When multiple ramming machines work in parallel, the spacing shall not be less than 10m

4. Insulating measures must be taken for the operating handrails of ramming machines. Prices in some regions have increased

5. Special distribution box shall be equipped, and special personnel shall be assigned to take care of it during work

v. technical measures for safe use of electricity for submersible pumps at the construction site

1. Before using the submersible motor, it must be tested with a 500 volt megohm meter, and its insulation resistance should not be less than 0.5 megohm

2. A special distribution box shall be set, and a leakage switch shall be installed in the box. The rated operating current of the leakage switch shall not be greater than 15mA, and the rated leakage operating time shall not be greater than 0.1s

3. When moving the submersible motor, the power must be cut off before starting the lower work

4. Ysh waterproof rubber sheathed cable must be used for the load line of submersible pump, and shall not bear any external force

5. The shell of the submersible pump should be reliably connected with the protective zero line

VI. technical measures for safe use of electricity for electric welding machines at the construction site

1. Electric welding machines can be used only after they are installed and accepted

2. Set a special protective switch box and a secondary no-load step-down protector device

3. Place the electric welding machine in a rain proof and well ventilated place. Inflammables and explosives shall not be stacked at the welding site

4. The length of the primary side power line of the electric welding machine is not more than 5m, and the incoming line is equipped with a protective cover

5. The secondary side line of the electric welding machine adopts YHS rubber sheathed copper core multi strand flexible cable, and the length of the cable is not more than 30m

6. The secondary wiring of the electric welding machine adopts copper nose connection, and it is not allowed to overlap at will

7. The metal shell of the electric welding machine is reliably connected with the protective zero line

8. Wear protective equipment as required when using welding machinery