Excuse me, what form is used for pre-embedded fire fighting and weak current conduit laying in the main structure construction? Beijing area

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Electrical:

1, electrical conduit laying standardization practice:

The metal conduit is laid in the basement and adopts hot-dip galvanized steel pipe;

Metal pipes are used for the design of fire linkage control, automatic fire extinguishing control, communication, emergency lighting and fire broadcasting. The thickness of concealed protective layer is not less than 30mm (non-fire line 15mm).

Roofs, rooftops and other outdoor areas

The electric conduit is welded by hot dip galvanizing.

Steel pipe or plastic pipe, the fixed pipe clamp shall be the off-wall riding pipe clamp; The outlet end of the vertical part of the pipeline out of the ground is bent into a semi-circular arc waterproof elbow or a waterproof elbow is added.

The joint of hot-dip galvanized steel pipe is bridged by special grounding card, and the connection between the two cards is RBV-4 m2；; When the non-galvanized steel conduit (SC) is connected by thread, both ends of the joint shall be welded by ∮6~8 round pipes across the ground wire; Tighten the top screws at both ends of the pipe joint until the nuts fall off, thus completing the grounding jumper;

The parallel distance between the electric conduit and the heating and hot water gas pipeline shall not be less than 300mm, and the crossing distance shall not be less than100mm; ;

The place where the electrical conduit passes through the deformation joint is connected with a hose, and the hose has a margin; One end of the deformation joint is connected with the wire box, and the metal wire tube needs to be grounded and bridged;

The place where the electrical conduit passes through the deformation joint is connected with a hose, and the hose has a margin; One end of the deformation joint is provided with a junction box, and the metal conduit needs to be grounded and bridged;

2, electrical cable laying standardization practice:

The air conditioning, toilet and kitchen socket circuits in residential buildings are independent circuits, and their wires and lighting circuits do not wear the same tube; It shows that the wires of the same AC circuit pass through the same metal conduit, and there are no joints in the pipe and groove.

The nozzle has protective measures, and the casing with thread protector or mouth protector is not missed when threading; After the wire or cable is inserted into the conduit installed outdoors, the nozzle is sealed;

The wiring in the box shall be arranged neatly, the loop number shall be complete, the identification shall be accurate, and the wires in the electric box shall be closely connected, so as not to damage the wire core and not to strand continuously;

1, cable embedded pipe embedding;

2. Purchase national standard galvanized steel pipes, and use a special hydraulic pipe bender when pressing elbows to ensure the quality of cable embedded elbows.

3. Complete the cable pre-buried pipe embedding construction before installing the cable trench template to avoid the influence of cable trench drilling and pipe embedding on the quality of civil construction.

In addition to the construction according to the drawings, the actual location of equipment wiring should also be considered when embedding the cable embedded pipe, so that the cable embedded pipe can be embedded in place at one time to avoid affecting the beauty of the cable lead-in line due to the deviation of the embedded pipe position.

The wiring in the box shall be arranged neatly, the loop number shall be complete, the identification shall be accurate, and the wires in the electric box shall be closely connected, so as not to damage the wire core and not to strand continuously;

1. According to regulations, high and low power cables and high and low current control cables are configured from top to bottom.

2. The temperature of the cable laying area should not be higher than the allowable long-term working temperature of the cable. When the cable is laid parallel to the outer surface of the pipeline insulation layer, the distance should be greater than 500mm, and when crossing, it should be greater than 200mm. If not, heat insulation measures should be taken.

3. The cable is led out from the cable rack with a hole opener, the cable tube is welded and fixed, and connected with a flame-retardant hose connector. Thermoplastic pipes are used to protect pipe ends without hose joints.

1) The laying speed of mechanical cable shall be ≤ 15m/min, and the traction strength shall be no more than 7kg/mm2, so as to prevent mechanical damage to the cable.

2) After cable laying, make cable ends at both ends, wrap them tightly with plastic tape, and then shrink and armor the cable with heat shrinkable tubes, and tie the steel tape tightly with hoops.

3, electrical wiring standardization practice

Wires with different sections can only be pressed on the same terminal after connecting the terminals. No more than two wires are connected on the same terminal, and the check washer is complete;

After the control cable is manufactured, the cable cores shall be straightened, arranged neatly, with uniform binding distance and spacing of 100~ 120mm, and arranged vertically or horizontally. The length of spare wire core shall be reserved with appropriate allowance, the bending radian of secondary wiring wire core shall be consistent, and the length of wiring rubber head shall be consistent. The multi-strand core presses the thread nose, and the thread tip is exposed from the nose by 0.6 ~1mm.

4, electrical bridge installation standardization practice

Generally, the supports and hangers are directly welded on the embedded parts, which can be fixed by expansion bolts without embedding iron pieces. It can be directly welded and fixed on the steel structure, and the welded parts should be painted after installation. Cable supports shall be clearly grounded and well grounded.

The selection of bridge frame in outdoor places such as roof should consider that the chassis should be hot-dip galvanized rain-proof bridge frame with drainage holes, and the cover plate should be rain-proof gland; The basement bridge is made of hot dip galvanized material (unless the power supply bridge has special requirements);

All bridge supports and hangers (not galvanized, painted and sprayed with plastic) that need antirust treatment shall be painted with antirust paint and topcoat (before installation);

The spacing between supports and hangers for horizontal installation of cable tray is1.5 ~ 3m;

The bridge or ladder with a cable bridge width of 600mm or less uses a hanger with spiral suspenders and angle steel suspenders; Specifications of cable bridge suspenders with different widths (see table for details);

Cable tray supports with wall width 100m or more can be installed with angle steel brackets, which can be manufactured and installed by tray manufacturers or suppliers.

For the vertically installed bridge (such as in the shaft), the bracket spacing is 2m, and flat steel with a thickness of not less than 4mm is fixed at the bottom of the bridge, or angle steel < 30 * 3 ~ < 50 * 5 is fixed by bolts on both sides of the bridge.

Parallel spacing: there are flammable and explosive pipelines 0.4m0.5m away from general process pipelines; With thermal insulation of 0.5m and without thermal insulation1.5m; Cross spacing: there are flammable and explosive pipelines 0.3m0.5m away from general process pipelines; It is 0.3m when it is insulated from the thermal pipeline, and 0.5m when it is not insulated.

5, electrical pre-branch cable standardization practice

Pre-branched cable: pre-embedded hook at the top of cable shaft; There shall be no less than 2 fixed brackets on each floor, and the lowest fixed bracket shall be 500mm above the ground.

6, electrical grounding device standardization practice

Welding lap length: round steel and round steel or flat iron ≥ 6d; Flat steel and flat steel ≥2b. (D is the diameter of round steel, and B is the width of flat steel) The lap welding of flat steel shall not be less than 3 sides ("two long and one short").

7, electrical down lead standardization practice

During the main body construction, the main reinforcement inside and outside the column shall be used as lightning protection downlead, and each downlead shall be no less than 2 Ф16mm steel bars, and marked;

8, electrical test point standardization practice

9, electrical lightning protection belt standardization practice

Lightning protection belt installation height 150mm, bracket spacing 1000mm, corner spacing of 300mm (except those with special requirements in Shanghai), uniform and reliable layout, upright and straight; Lightning protection belt passes through expansion joint and settlement joint, leaving arc margin;

Metal objects such as the roof, metal pipes on the roof, metal water tanks, air ducts, air conditioners of range hoods, etc. are all connected with lightning protection devices (-25*4 flat steel shall be embedded in the structure construction);

The openable door of the distribution box (cabinet) is grounded with tinned copper braided tape or RBV-6 grounding wire, and the grounding wire is reliably connected with the terminal;

The installation height of the exposed distribution box wall in the basement and shaft is 1.2~ 1.5m (large box1.2m) from the ground;

10, electrical lamps and lanterns installation standardization practice

The distance between guide lights on the evacuation passage is ≦ 15m (civil air defense works ≦10m); Corner area of walkway ≦1m;

Selection of aviation obstacle light: low light intensity (used when installed below 60m above the ground) is red and always on; High light intensity (above 150m) is white flash; The light intensity (60~ 150m) is red or white; The power supply of aviation obstacle lights should be supplied according to the requirements of the highest load level in the main building;

The lamps and lanterns (underwater lamps and waterproof lamps) in swimming pools and similar places are all equipped with equipotential connection, and their power supplies are equipped with special leakage protection devices; Insulated conduit is used to lead the lamp from the power supply;

The lighting at the entrance and exit of the garage should not be installed by hanging chain;

The two ends of the flexible cord of the flexible cord chandelier are made with protective buckles, and the core wires at both ends are tinned; When the nut is used, the phase wire is connected to the terminal in the middle of the nut;

100mm is installed on the door frame of the emergency exit light; The bottom edge of the double-headed emergency light is 2.4m from the ground; Evacuation lamp height 600mm；;

1 1, electrical panel installation standardization

Installation height of indoor public panel (bottom edge from the ground): switch 1.3m, socket 0.3m (splash-proof socket1.5m; Bathroom, balcony and other parts; 2.2m； socket for range hood and exhaust fan; The installation height of wall-mounted air conditioning socket is 2.0m); Appearance requirements: the deviation of the same room is less than 5mm, the height difference of parallel installation is less than 1mm, the panel is close to the wall, there are no gaps around, the surface is smooth and tidy, and there are no cracks and scratches;

The installation position of the living room lighting switch at the entrance is along the door opening direction, that is, the inner wall on one side of the door lock, and the horizontal distance from the door frame is150 ~ 200 mm;

1, the cable is dense in fire prevention, so as to achieve the purpose of reliable fire prevention.

2. The fireproof plug is beautiful in appearance, and the fireproof board and fireproof mud are in regular geometric shapes, which are neat and consistent.

Water supply and drainage:

1, water supply and drainage equipment installation standardization practice

The bottom of the sump drain pipe connecting the elevator foundation pit should be flush with the lowest part of the elevator foundation pit, and one end of the sump is 200 ~ 300mm； away from the wellhead;

The expansion joint is installed at the lower part of the tee connecting the horizontal branch pipe on each floor; In the high-rise building, each floor of the drainage plastic pipe with a height of ≧ 1 10 is provided with a firestop ring;

The supports and hangers of the drainage riser shall be composed of supports and hangers matched with the pipeline; The pipe clamp is in close contact with the drainage pipe;

After the installation of riser and branch pipe is completed, irrigation and ball passing test shall be carried out as required;

Dismantling the drainage civil structure on the same floor: when the toilet is arranged in the form of a common three-piece suit, and the long side is less than 3.5m, the height of dismantling the structure is 250mm；; When there are more than five sanitary wares in the bathroom or the long side is more than 3.5m, the height of the structural downcomer is 300mm. The center of the exhaust hole of Yuba is 40mm away from the bottom of the upper toilet structural plate, and the hole size is φ 80; Installation of riser and pipe fittings: in the hardcover room, connect pe expansion expansion expansion joint, pe tee or tee and riser according to the position of toilet appliances determined by design, then install PVC50 secondary drainage floor drain, and finally pour concrete hanging holes twice;

2, water supply and drainage water supply pipeline installation standardization practice

Installation of rigid waterproof casing for wall bushing, ground bushing and roof bushing in basement (this article is applicable to all branches); Flexible waterproof casing must be used for pipelines passing through walls and structures with vibration or strict waterproof requirements;

Material selection: PP-R is used for indoor water supply branch pipe, and hot-melt connection is adopted. The pipe clamp should be closed, but the U-shaped clamp should not be opened; The water supply pipe of the pump house and the vertical pipe of the shaft adopt steel-plastic composite pipe; When PPR is used in cold water (≤40℃) system, PN 1.6MP pipes and fittings are selected; PN2.0MPa pipes and fittings are selected for the hot water system.

Dn 100 is greater than or equal to clamp connection or flange connection, and dn 100 is equal to threaded connection (this article also applies to fire hose).

Pipes reaching or close to freezing point in winter, such as exposed pipes on roofs, pipes in open corridors, underground storage entrances and exits, need thermal insulation. The insulation layer is made of rubber, plastic or rock wool, and the protection layer is made of galvanized steel plate or aluminum alloy plate.

Connection mode: all water pipes in the system are connected by galvanized steel pipe thread or groove. Threaded connection can be used when DN ≥ 80, and grooved connection can be used when DN ≥ 80;

Material selection: galvanized steel pipes and fittings are used for pipes and fittings of indoor fire hydrant system;

There is no broken or missing thread in the processing of pipeline thread mouth, and 2-4 threads are exposed; Brush red lead antirust paint on exposed threads for anticorrosion treatment; The center lines of pipes and fittings are on the same straight line and are not inclined; According to different pipe diameters, the pipe groove should not be too deep or too shallow; The pipe clamp has the same caliber as the pipeline and is fastened with matching bolts;

Painting of pipeline: the surface of pipeline shall be painted with red topcoat, which shall be painted evenly without any pattern; Non-galvanized supports and hangers and accessories shall be painted with iron red antirust paint and topcoat once after rust removal; When angle steel or channel steel hanger is used for fire sprinkler pipes, when one hanger is used for single or two pipes of DN80 and below, the hanger adopts ∠40*4 angle steel; DN 100 and above single or two pipes * * * Use a hanger and choose 5# channel steel as the hanger. When three or more pipes * * * use a hanger, adjust the specifications of angle steel or channel steel appropriately according to the pipe specifications to meet the load;

The distance between the pipe hanger and the nozzle is not less than 300mm, and the distance between the pipe hanger and the end nozzle is not more than 750mm；; Each pipe section on the branch pipe and between two adjacent nozzles shall not be less than one hanger, and the spacing between hangers shall be 3.6m.: Reference distance of support and hanger of main pipeline: DN32~40 (inclusive), 4m; DN50 ~ 80，5m； DN 100~ 150, 6.5mDN200~300, 9.5m pipeline bends or joints are added with supports and hangers;

For pipelines with ≥DN50 or higher, when spiral hangers are selected, anti-sway brackets shall be set for each straight pipe section within the range of 15m, and anti-sway brackets shall be added when the pipeline turns; 5# angle steel is used as the fixed bracket of spray standpipe, and the installation height is1.6m; : In addition to fixing the middle of the vertically installed main pipe with pipe clips, anti-sway brackets should be set at the beginning and end of the main pipe, or fixed with pipe clips, and the distance from the installation position to the ground or floor is1.5 ~1.8m;

When the mechanical tee is connected, the clearance between the mechanical tee and the hole should be checked, and all parts should be uniform, and then fastened in place; The opening spacing of the mechanical tee should not be less than 500mm, and the opening spacing of the mechanical tee should not be less than1000mm; ; When the mechanical tee is connected with the mechanical tee, the diameter of the branch pipe should meet the requirements;

Nozzle: the nozzle is equipped with a special elbow or tee joint; Large and small heads are used at the end of the nozzle, and no bushing is used for reducing the diameter; DN25 galvanized steel pipe shall be installed at the end branch pipe;

Water flow indicator: the water flow indicator is installed on the upper side of the horizontal pipeline, and its action direction is consistent with the water flow direction; After installation, the blades and diaphragm of the water flow indicator are flexible and do not rub against the pipe wall;

Installation of water pump: overhaul the top plate directly above the foundation of water pump (including fire sprinkler and domestic water pump) of 37KW and above, embed the embedded parts of U-hook and weld them firmly with steel plate;

The bottom of the pump adopts shock absorption measures;

If the diameter of the water pump suction pipe is changed, the eccentric head should be adopted, with the plane up and the inclined section down; The suction pipe should be equipped with a bracket;

The inlet and outlet pipes of the pipeline should have movable supports or brackets to prevent the vibration of the pump from damaging the accessories during operation; Hang the opening and closing signs, spray water direction and text description as required;

Fire-proof plugging method: the top plate is plugged with fire-proof board, and the center of the hole larger than 100mm around the cable bridge is filled with fire-proof pillow and added with fire-proof mud;

Ventilation and air conditioning:

1, standardization of air supply/exhaust system

The supports and hangers are in the form of screws and anti-sway brackets; The minimum distance between supports and hangers of air ducts with long sides of 400mm and below is 4 meters, and the distance between supports for vertical installation is 4 meters, exceeding 400 meters and 3 meters (exceeding 2500mm according to the design); The fire valve, smoke exhaust valve and smoke exhaust port are provided with separate supports and hangers, and the basement ventilation pipeline is provided with swing angle steel brackets every 6 meters;

The outdoor fan is provided with a rain cover; Louvers and ventilation equipment are installed in the basement fan room, water pump room, power distribution room, weak current room and other equipment rooms.

The exposed transmission device (such as leather wheel) of the fan is protected by a protective cover made of galvanized iron sheet, and the tuyere leading to the atmosphere is equipped with a protective net;

Riser bracket for cooling water pipeline:

Riser bearing bracket is suitable for riser of cooling water system with DN above DN200; The invention is suitable for all types of cooling water systems;

Support details (1):

1) In order to facilitate casing installation and pipeline insulation construction, it is suggested that the distance between the bottom of steel support frame and the floor of finished building should not be less than150 mm; ;

2) Size Table (mm)

Process requirements:

1) When this kind of support is adopted, the influence of the load during pipeline operation on the structural safety should be considered by the relevant structural disciplines;

2) Inspect the appearance of the weld of the fixed bracket to meet the requirements of the welding process (see the welding process section), and correct the welding deformation;

3) The bearing supports of cooling water pipelines are generally located at the bottom of tube wells, and the number of bearing supports is determined according to design requirements or stress calculation;

4) Generally, pipeline compensation is not considered for cooling water pipes;

5) When only one fixed support is provided, it is necessary to reinforce the first horizontal support at the bottom of the riser or increase the type of steel used for its support (the specific size needs to be determined after stress analysis, and the stress calculation of bearing support is shown in Appendix1);

6) Qualified supports and hangers shall be treated with anti-corrosion (see chapter on rust removal and anti-corrosion painting) and properly kept.

7) The illustrations are only single-tube style, and can be combined when multiple tubes are used together;

8) See HG/T2 1629- 1999 Standard Drawing of Pipe Supports or Indoor Pipe Supports and Hangers 03S402； for the selection of supporting ribs and supporting plates;

9) The pipeline setting of the cooling tower (energy tower) running in winter should refer to the chilled water pipeline.

Support details (2):

3, pipeline horizontal bracket standardization practice

Scope of application:

1) This bracket is suitable for places with relatively narrow installation space, especially for places with limited ceiling space;

2) The bracket is only applicable to pipes with outer diameter ≤ 108mm.

4. Standardization of freezer bracket

5, duct wall, floor standardization practice:

When the air duct passes through the fire-proof and explosion-proof wall or floor to be closed, an embedded pipe or protective sleeve shall be set, and the thickness of its steel plate shall not be less than 1.6 mm ... Between the air duct and the protective sleeve, a flexible material which is incombustible and harmless to human body shall be used for plugging. Non-upper partition wall can be reinforced without casing.

Process description: 1) The steel casing and plugging material shall be flush with the finished surface; The exposed surface of the air duct sleeve is blocked by the fireproof board, as shown in the above figure.

2) The air duct hanger is locked with double nuts, with 2~3 exposed screws;

3) A steel plate sleeve with a diameter greater than 1.6mm is added to the reserved hole of the horizontal air duct through the wall or expansion joint, and other materials are filled in the sleeve. Fire-proof boards are added to the surface of the casing where the air duct passes through the wall, and the four corners of the fire-proof boards are fixed on the wall with expansion bolts. The size of the fireproof board shall be at least 50 mm; Larger than the reserved hole;

4) Machining screw holes of air ducts and fire damper hangers;

Install the floor air conditioner and fan (4)

The joint surface of rubber damping pad and equipment base and equipment foundation must be padded with steel plate. Air conditioning units and condensate pipes should be equipped with water seals, and the height of water seals should be set according to equipment requirements or determined by calculation. When the discharge distance of condensed water is too long, the water seal section should be disconnected from the horizontal drain pipe to prevent the water flow from being blocked. The main condensate drain pipe should be provided with slope and drainage point, and it is not allowed to directly insert the floor drain.

Process requirements:

1) Before the installation of the fan, the equipment foundation shall be thoroughly inspected according to the design drawings, product samples or fan objects to meet the dimensional requirements.

2) The strength of equipment foundation should meet the design requirements. Before the fan is installed, the pits on the foundation surface should be shoveled off, so that the secondary poured concrete or cement mortar can be closely combined with the foundation.

3) When installing the rubber damping pad, the ambient temperature should be considered, and the rubber damping pad should not exceed the service temperature. Rubber shock absorbers are generally only suitable for the temperature range of-15 ~+70℃.

4) When rubber damping pads are used in series, steel plates must be installed in the middle to separate them, which shall not exceed three layers. The concave line of rubber damping pad must be clean and free of sundries, so as not to affect the damping effect.

5) The joint surface between rubber damping pad and equipment base and equipment foundation must be padded with steel plate.

6) Rubber damper or spring damper can be selected according to the equipment vibration reduction requirements.

7) After the equipment installation is completed, release the spring damper attached to the fan shell in time.

Install a small exhaust fan (5);

Process requirements:

1) When the exhaust fan is installed on the wall, the length of the wire sleeve depends on the fan length or the wall thickness.

2) The wall shall be a load-bearing wall. If the wall thickness is greater than the length of the fan damper, a short pipe can be terminated at the air outlet; If the thickness of the wall is less than the length of the air duct, the extra part should be on the indoor side. For the load-bearing infilled wall, a reinforced concrete frame should be set according to the thickness of the wall, and the connection structure between the frame and the wall should be designed by structural professionals.

3) When installing, the electrical junction box on the fan housing should be removed and moved to a suitable position on the wall, and the power cord should be led to the junction box through the sleeve. The location of the junction box and the way of burying the pipe should be indicated in the electrical construction drawing.

4) Figure 2 is applicable to the installation of axial flow fan whose electrical junction box is not detachable, but the whole fan can be taken out of the sleeve.

5) All parts of the cylinder in Figure 2 are welded, and the height of the weld should not be less than the minimum thickness of the welded part.

6) All exposed parts of metal components shall be painted with two layers of antirust primer and two layers of ready mixed paint after floating rust.

7) The L value in figure 1 is determined according to the fan model and wall thickness.

8) The installation dimensions in the specification table should be adjusted according to the actual situation.

Intelligence:

1, fire alarm standardization practice

Alarm and linkage: the lines with different systems and different current types are not in the same pipe, so the wires with different colors should be selected when laying. The conductor color of the same line in the same project should be consistent, and the terminals should be numbered;

2. Standardization of access control system

Unit door intercom host: fixed on the unit door or the side wall next to the unit, and can be installed on the right side if possible. According to the length of different portal cranes, to ensure that the camera of the visual portal crane is 1.5 meters high from the finished surface (as shown in the left figure below). When the main engine is installed outdoors, waterproof measures should be taken.

Exit button: the elevation of the bottom of the embedded box from the ground is1.3m. If the embedded box is flush with the elevation of the bottom of the wall, the horizontal distance between them is 0.2m. The horizontal distance between the embedded box and the door edge is 0.20m (if there is not enough space to put it in the middle).

Indoor extension: the embedded box bottom is 1.3m high from the ground, which is consistent with the horizontal elevation of the wall and the switch panel, and the embedded box bottom is 86 1.3m high; The horizontal distance between the embedded box of intercom extension and the embedded box of switch is 0.2m

3. Standardization practice of intrusion alarm system

The embedded box of the indoor alarm extension and the bottom of the visual intercom indoor extension are kept on the same horizontal plane, the height from the ground is 1.3m, and the distance between them is 0.2m.

The bottom of the embedded box of wall-hung curtain detector is 2.2 meters high from the ground, and it is installed on the side wall tangent to the door and window to be protected, and the horizontal distance is 0.3 meters from the side wall of the door and window to be protected. The detector cable should be hidden in the detector bracket. If the infrared detector needs to be installed at the door, it is easy to use the ceiling installation method;

4. Standardization of TV monitoring system

The underground garage is wall-hung, and the bottom of the embedded box is 2.5 meters high from the ground; Ceiling installation should be located in the middle of the main channel; The installation position of the camera at the entrance and exit of the underground garage at the entrance of the unit should be considered to avoid backlight as much as possible;

5, cable laying and termination standardization practice

Information box: weak current wiring, cable TV, network information * * *, if smart box is used, the bottom of the box should be hidden horizontally at 0.3m from the ground, otherwise the horizontal or vertical spacing should be at least 0.1m; Waterproof and heat dissipation should be considered for outdoor installation of equipment box;

The material thickness of weak current equipment box and power box in pipeline shaft and underground garage should be ≥ 1MM, all equipment in the box should be neatly installed in the equipment box and fixed on the bottom plate of the equipment box, and all connecting wires should be permanently marked and neatly tied.

Strong and weak current * * * slots are prohibited; Cable binding spacing between trunking and wire rack should be uniform, binding thread buckles should be neat and elastic, and binding thread ends should be concealed;

7, computer room standardization practice:

The foundation of the computer room shall be smooth, clean and dust-free, and the moisture content shall not exceed 8%. Before installation, it should be cleaned and coated with insulating grease or paint if necessary. After the anti-static floor is laid, it should be cleaned and waxed, and the anti-static floor should be free of stains and scratches.

Grounding: The grounding terminal of the signal surge protector in the machine room shall be a multi-strand insulated copper conductor with a cross-sectional area not less than 1.5mm2, which is connected to the local equipotential grounding terminal board in the machine room at a single point; All levels of surge protectors (SPD) of power lines should be installed at the front end of power lines of protected equipment, and each terminal should be connected with the terminal with the same name in the distribution box; The grounding terminal of the surge protector is connected with the protective grounding line (PE) grounding terminal board of the distribution box, and the protective grounding line grounding terminal board should be connected with the equipotential grounding terminal board in the lightning protection area; The terminal of power line surge protector should be crimped;

The surge protector with terminal is connected with the terminal through the nose;

This article comes from the network and is edited by HVAC South Society.

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