Chapter 5 safety measures for working on overhead

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Chapter V safety measures for work on overhead and cable lines (I)

section I safety measures for line power failure

Article 148 line power failure shall comply with the provisions of this chapter in addition to the relevant technical and organizational measures specified in Chapters III and IV

Article 149 if the property right of overhead lines or cable lines belongs to the power consumption unit and is responsible for the maintenance by itself, if the power supply needs to be cut off by the substation of the power supply bureau, it should contact the power consumption supervision section of the power supply bureau in advance and go through the procedures of power cut and transmission

Article 150 after the safety measures for power failure are completed, the "no switching on, someone working on the line" shall be hung at the line switch that has been powered off immediately Signboard of. When multiple groups of personnel on the line work at the same time, the number of signboards should be the same as the number of work teams. It is strictly forbidden to stop or send electricity on schedule

Article 151 after the work is completed, the person in charge of the work shall complete the quality inspection, remove all grounding wires, and apply for power transmission only after all staff leave the work site. Once the power transmission is applied, the line is deemed to be live, and no one is allowed to work on the pole. If it is necessary to work again, the power failure procedures should be handled again

section II earthwork

Article 152 before digging a pit or cable trench where underground cables and pipelines may be buried, contact the relevant units to find out the exact location of underground facilities and take protective measures. Special care should be taken in the process of digging pits (ditches), and shovel should be used as much as possible. Without special measures, it is not allowed to use machinery, picks, knives and other tools

Article 153 when digging a pit in a soft soil area, measures should be taken to prevent collapse, such as adding baffles, braces, etc. It is forbidden to dig the soil layer from the bottom

Article 154 when throwing soil upward in a pit (ditch) more than 1.5 meters deep, attention should be paid to prevent the earth and rock from falling back into the pit and injuring the staff

Article 155 pole pits and cable trenches dug near residential areas and access roads shall be fenced or covered, and red lights shall be hung at night

Article 156 when digging a pit with a large bucket, keep your legs apart and stand in a good position to prevent hurting your feet and head

Article 157 when the depth of cable trench excavation exceeds 1 meter, someone should clear the soil beside the trench at any time, and walkways should be cleared on both sides

Article 158 when excavating cable trenches, tools should be checked first. When excavating trenches, a safe distance should be maintained between people to prevent bumps

Article 159 in case of hard soil and open surface, use sledgehammers and irons with goggles. Hammerers should not wear gloves. The drill helper should squat on the side of the hammer driver

section III pole climbing work

Article 160 before climbing the pole, the root of the pole should be checked to see if the safety period has been exceeded. If the safety period has been exceeded or if there is doubt, the root of the pole should be checked to see if it is firm. In case of pole collapse due to ground scouring, soil lifting and pulling up, soil shall be cultivated and compacted first, or the pole shall be erected well, and the pole shall be mounted after the temporary stay wire (rope) is laid. If the diameter of the decayed fir pole is more than one-half, or the diameter of the decayed pine pole is more than one-third, the pole shall be mounted after the bond pile is driven. No climbing is allowed until the foundation of the newly erected pole is compacted

article 161 before climbing the pole, check whether the climbing tools, such as foot buckles, safety belts, ladders, etc., are secure. The mechanical strength of safety belts, shackles, ladders, ropes, etc. shall meet the requirements of Appendix II

I. The use of foot buttons shall comply with the following provisions:

1. The size of foot buttons shall be compatible with the diameter of the pole

2. There must be large and small belts on the shackles. Check whether they are intact before use. If there is crack or decay, it should be replaced before reuse

3. When using rubber shackles to climb the bar, check whether the rubber layer falls off, separates from the bone and is smooth

4. Before using the foot buckle, check whether it has been dropped. If the opening is too large, too small or crooked, repair it

II. The use of safety belts should comply with the following provisions:

1. Before the use of safety belts, check whether there is decay, embrittlement, aging, broken strands and other phenomena, whether all shackles are firm, and whether the eyelets on the belts have cracks

2. The shackle on the safety belt shall be equipped with a safety device to prevent automatic decoupling

3. The safety belt should be tied at a reliable place. It is forbidden to tie it to the cross arm, berm, pole tip and the parts to be replaced

4. After the safety belt is fastened, hook the hook and loop first, and then lean over or back after the safety device is installed. It is forbidden to lean over by listening. When rotating on the pole, the safety belt protection should not be lost

III. The use of ladders should comply with the following provisions:

1. The length of ladders should adapt to the height of the construction site

2. Before using the ladder, check whether it is firm and whether it is split. Bamboo and wood ladders shall be tenon connected

3. The load of the ladder should be greater than the weight of the worker and the total weight of the load

4. The angle between the ladder and the ground should be 60 degrees. Anti skid measures shall be taken on smooth and frozen ground

5. The staff on the ladder should not lean over to prevent the center of gravity from shifting and falling. At the same time, you must pin your legs in the middle of the ladder, and don't stand on the top bench to work

6. The ladder should be supported by a specially assigned person. When someone is working on the ladder, the root of the ladder should not be moved, and no one is allowed to pass under the ladder

7. If the ladder is erected on the conductor or metal structure, there should be a metal hook, and the metal hook must be firmly connected with the ladder

8. ladders should not be erected on unstable objects such as boxes, barrels, flatcars, etc

9. When the ladder is attached to the pole, the diameter of the small rope used should not be less than 15mm

10. The lower end of the double ladder (high stool) should be equipped with a pull drill to limit the opening. When the height is more than 4 meters, the lower part should be supported by someone, and the upper staff should try to fasten the safety belt for operation

the 162nd pole is this year. It is forbidden to throw tools and materials up and down, and it should be transmitted by small rope. The small rope shall not be tied to the safety belt

Article 163 all personnel working at heights (including ground auxiliary personnel) shall wear safety helmets. It is not allowed to use if there is no elastic rope in the cap shell. In winter, leather and cotton caps can be used instead of hard hats

when working at height, no one is allowed to stand under the pole, and attention should be paid to pedestrians and vehicles

Section IV provisions on working near or at the intersection of live lines

Article 164 work on live line towers can only be carried out on the parts insulated from the conductive part, and the safe distance from the conductive part shall not be less than that specified in Table 1

Article 165 when working near (or across) other live lines, the safety distance between workers and live lines (including crossing shelves) shall not be less than the following values:

10 kV, 1.0 m; 35 kV, 2.5m

110 kV, 3.0 m; 220 kV, 4.0 meters

the repaired line should be reliably grounded

Article 166 if the power-off maintenance line is above another live line, in principle, the live line below should be powered off, otherwise safety measures should be formulated, and the following requirements must be met:

first, the safety distance between live and power-off conductors should meet the provisions of Article 165

II. It is necessary to erect crossing frames or use high vehicles and other equipment above the live lines, and measures should be taken to prevent the conductor from falling off and sliding

Article 167 when using winch and other traction tools, it should be grounded. When removing the wire, the removed wire should also be grounded to prevent induced voltage

article 168 when a section of the maintenance line is adjacent and parallel to the live line, the grounding wire should be hung on the section of the maintenance line close to the live line. Nearby live poles and towers should be hung with "no climbing, high voltage danger!" Signboard of

Article 169 when there is a long parallel section between the maintenance line and the live line, before working to reduce the error, the person in charge of the work should indicate to the personnel participating in the work which is the maintenance line and which is the live line, and make all the staff clearly identify it before climbing the pole, and should hang "no climbing, high voltage danger" on the pole at the corner of the live line or where the terrain changes Signboard of

when 170 lines on the same pole are electrified and overhauled, special personnel shall be assigned to monitor them

article 171 when using uninsulated ropes for power failure work adjacent to live lines, the distance to live conductors shall not be greater than the following provisions:

10 kV, 1.0 m; 35 kV, 2.5m

110 kV, 3.0 m; 220 kV, 4.0 meters

article 172 when overhauling and loosening the conductor on the line crossing above the live line, a crossing frame (or a high vehicle) shall be erected at the crossing, and its frame width shall be 3 meters longer than the line cross arm, and shall be consistent with the center position of the line. There shall be fence posts at both ends of the crossing frame

Section V pole erection and withdrawal work

Article 173 the pole erection and withdrawal work shall be under the unified command of a specially assigned person. Before commencement, the construction method and contact signal shall be explained. Staff should have a clear division of labor. When erecting or removing poles in residential areas or on traffic roads, special personnel should be assigned to take care of pedestrians and vehicles

article 174 qualified lifting tools shall be used for erecting and removing poles. Before construction, the machines and tools shall be checked on site to see whether they are in good condition. Overload use is prohibited

Article 175 no one is allowed to work in the pole pit during pole erection and withdrawal. Except for the commander and relevant personnel, other personnel should withdraw to a distance beyond 1.2 times the height of the pole pit

article 176 in the process of pole erection, if it is necessary to repair the pit wall, the pole erection work shall be suspended, and measures shall be taken to prevent the pole body from rolling

article 177 the pole pit of manual pole erection shall be excavated with a berm. The number of legs shall not be less than two, and there shall be sliding plates in the pit

Article 178 when using the outrigger pole, the center of the pole and the top of the outrigger should be on a horizontal vertical line. The legs should be stressed evenly, and the legs can be removed only after the pole foundation is completely filled and compacted. When using the frame leg to erect the ash pole, the frame leg chain should take anti-skid measures

Article 179 on the page with satisfactory conditions. When erecting a new pole with an old pole, check the root of the pole first, and if necessary, install a temporary pull rope or take other measures

Article 180 precautions when using the crane to erect and remove the pole:

first, the crane position should be appropriate, the crane support should be placed properly, and measures should be taken immediately in case of sinking and tilting

II. The steel wire rope sleeve should be tied at the appropriate part of the rod body to prevent "forward sinking"

III. try to pull out the rod with a crane first. If there is a problem, check whether there are chuck, chassis and other objects

IV. the lifting process should be commanded by a specially assigned person, with a clear division of labor, and a clear command signal with the driver

v. no one is allowed to stand under the boom

Article 181 when the crane is working near the live line or equipment, the boom and the suspended pole should keep a safe distance from the live part, and there should be a special person to monitor. The crane should be grounded

Article 182 for the integral assembly of poles and towers, if the pole pulling method is used for pole erection, specific construction safety measures shall be formulated

section VI setting out, tightening and withdrawal work

Article 183 when setting out and withdrawing lines across power and communication lines, railways, highways, rivers, etc., crossing frames should be erected, and the competent departments should be contacted in advance to obtain consent and strive for on-site cooperation. Safety measures shall be taken at the crossing with live lines in accordance with the relevant provisions of Section IV of this chapter

Article 184 special personnel shall be assigned for unified command of setting out, withdrawing and tightening. All staff should make clear the contact signal and stop working immediately in case of abnormal conditions

article 185 when there are live lines or equipment above or adjacent to the erection line, place and tighten it

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