Distribution box (disc) installation
1 scope
The technology standard is applicable to building electrical distribution box (dish) installation.
2 construction preparation
2.1 material requirements:
2.1.1 iron distribution box (disc) : housing should have a certain mechanical strength and the surrounding flat no damage, no paint falls off, second floor slab thickness is not less than 1.5 mm, but not do second floor adopts the flame retardant plastic, all kinds of instruments shall be installed in the firm, wires neatly, firm pressure, should be two appointed product, and product certification.
2.1.2 plastic distribution box (dish) : housing should have a certain mechanical strength. Surrounding flat without damage, plastic floor slab thickness should not be less than 5 mm, with product certificate.
2.1.3 wooden distribution box (disc) : should brush anti-corrosion, fireproofing coatings, wooden plate area should not be less than 20 mm thick.
2.1.4 materials for galvanized Angle steel, flat iron, sheet metal, machine screws, wood screws, bolts, washers, round nails, etc.
2.1.5 insulation wire, wire specifications must comply with the design requirements, and product certification.
2.1.6 other materials: electrical instrumentation, fuse (or melt), terminal board, insulation mouth, aluminum casing, card box, soft plastic tube, wood and brick nail, plastic belt, black tape, antirust paint, grey paint, solder, flux, welding electrode (or calcium carbide, oxygen), cement and sand.
2.2 the main equipment:
2.2.1 pencil, tape measure, meters, level, steel ruler, line drop shovel, bucket, brushes, ash, etc.
2.2.2 hammer and chisel, hacksaw blade, wood file, flat file, round file, stripping pliers, long nose pliers, crimping pliers, live wrench, socket wrench, tin tin pot, spoon, etc.
2.2.3 bench drill, drill, drill bit, auger, vise, case, nail gun, electric furnace, electricity, gas welding tools, insulating gloves, iron scissors, punch, megohmmeter, tool bag, toolbox, high stool, etc.
2.3 operation conditions:
2.3.1 with good civil structure reserved dark assembly electric box installation location.
2.3.2 hob or embedded bolt, the wall structure construction horizontal line should pop up.
2.3.3 distribution box installation disk, plaster, spray and paint should be complete.
3 operation process
3.2 distribution box (disc) installation requirements:
3.2.1 distribution box (plate) shall be installed in a safe, dry, easy to operate. Distribution box (dish) when installation, its bottom is apart from the average of 1.5 m; With the mouth from the bottom to 1.2 m; With the mouth from the meter board base shall not be less than 1.8 m. In the same building, the height of the similar plate should be consistent, allowable deviation for 10 mm.
3.2.2 installation distribution box (dish) for iron and wood brick shall be embedded. Exo distribution box (disc) should be used metal expansion bolt.
3.2.3 iron distribution box (disc) must first brush anti-rust paint again, gray paint is brushed again two way. Various embedded iron all should brush anti-rust paint, and make clear and reliable grounding. Conductor which leads to the panel, panel line hole should be smooth and no burr, metal plate should be installed insulating case.
3.2.4 instruments (disc) distribution box with iron disk and a metal shell of the door of the appliance and electrical shall have clear and reliable PE protection of ground wire (PE line of yellow and green double color line also can adopt soft ground wire weaving), but the PE protection ground wire is not allowed to use box or concatenated box body.
3.2.5 distribution box (disc) wiring neat rows, and tie them into bundles and parts should be fixed in the activity. Disk derivation and imported wire should have appropriate redundant, in order to facilitate maintenance.
3.2.6 conductor exploitation should not hurt wire core or wire core is too long, wire head should be solid and reliable, multi-strand wire should not be disc circle pressure, should be equipped with wire terminals (except of line pressing hole). Such as must be perforated with top silk, the pressure to the multi-strand wire should be rinse again after tin, pressure may reduce wire number of shares.
3.2.7 distribution box (disc) automatic disk installed on all kinds of breaker and switch, etc., when in the open circuit state, blade movable parts should not be charged (except for special cases).
3.2.8 vertical installed and fuse breaker electrical top to connect power, lower load. Lateral left (facing the disk) to connect power, the right side of the load.
3.2.9 distribution box (plate) on the power indicator light, the power supply connected to the outer edge of the master switch, and should be a separate fuse (supply side). Disk brake position should correspond to branch, it shall be installed under the card box, indicate the way don't and capacity.
3.2.10 TN - C in the low-voltage distribution system neutral N should be on the box body or disk, the introduction of repeat grounding grounding line.
3.2.11 lighting distribution box (board), dc or different voltage grade of power, and has obvious signs.
3.2.12 lighting distribution box (board) should not be made of combustible materials in a dry clean place the wooden panel box (board) should be flame retardant processing.
3.2.13 lighting distribution box (board), should be set respectively neutral line N and the protection of ground wire (PE) bus, neutral line N and the protection of ground wire should be on the bus connection, splicing, and should be numbered.
Bare 3.2.14 magnetic plug fuse base center screw holes should be filled with insulation, to prevent the discharge. Magnetic plug insurance shall not be bare metal screws, should fill seal.
3.2.15 lighting distribution box (board) installed inside the spiral can fuse the power line in the middle of contact terminals, load line up on the thread of the terminal.
3.2.16 used materials and phase line phase at the same time as PE line should choose according to the requirements of the thermal stability of section should not be less than shown in table 3-38.
Minimum cross section table 3-38 PE line
Phase lines S core section
(was) PE line minimal cross section
(was) lines S core section
(was) PE line minimal cross section
(was)
S 16 S 35 S/S > 2 or less
16 S 35 16 or less or less
Note: use this form if it is concluded that cross section, should choose the most close to the standard cross section of conductor. But shall not be less than: 4 was bare copper wire, bare
Aluminium wire was 6, 1.5 was insulated copper wire, aluminum wire insulation was 2.5.
3.2.17 PE protection ground if it is not part of the power supply cable or cable outer sheath, according to the requirements of mechanical strength, the section should not be less than the following values:
Have a mechanical protection was 2.5; 4 was no mechanical protection.
3.2.18 distribution box (plate) on the bus the phase lines shall be marked with color, A phase (L1) should be painted yellow; B phase (L2) should be painted green; Phase C (L3) should be painted red; Neutral N corresponding painted light blue; Protection of ground wire (PE) should be painted yellow and green double color.
3.2.19 distribution box (plate) on electrical appliance, instrument should be strong, a right, neat, uniform spacing, copper terminals without looseness, the opening and closing flexible, complete parts. The arrangement spacing should be consistent with table 2-39.
3.2.20 lighting distribution box (board) should be installed firmly, levelled, the vertical deviation should not be greater than 3 mm; When installation, lighting distribution box (board), should be no gap around the panels around the edges should be clingy metope, boxes and buildings and other structures contact parts should be painted anticorrosive paint.
3.2.21 wooden disk plate should be tested for fire prevention corrosion, and should be wrapped iron, clear and reliable grounding;
3.2.22 fixed panel machine screw, should use galvanized round cap machine screw, the spacing shall not be greater than 250 mm, and should be symmetrical in the four corners equably.
3.2.23 (plate) for the larger panel, distribution box should strengthen lining iron, when more than 500 mm width, the door should have a double door.
3.2.24 vertical plate back away from the building should be not less than 800 mm; Basic sections before installation should be buried after straightening is fixed, the level of error should be not more than 1 mm per meter, total length of the total error is not more than 5 mm. The bottom of the disk mouth should not be less than 500 mm off the ground. Hob with the switchboard distance buildings should be easy maintenance.
3.2.25 vertical plate should be located within a dedicated room or add fence, grating should be grounded.
3.3 play line positioning:
According to design requirements to find distribution (dish) position, and shall be carried out in accordance with the box (dish) dimension elastic line positioning; Is the purpose of the positioning of the elastic line with embedded brick wood or iron, can more accurately find out the embedded parts, or you can find out the location of the metal tube expanding bolt.
3.4 Ming assembling electrical box (dish).
Hob fixed distribution box (dish)
Will bar straightening, measure good measure, draw line curf, sawing simmer bending, drilling, welding. Simmer find is bent on feet, electricity (gas) welding, the counterpart seam weld, and buried dovetail note side make it, then derusting, brush anti-rust paint. Again according to the elevation of the hob dovetail with cement mortar will be buried side note, when embedded to pay attention to the flat degree of hob and the distance between holes, again after application line falling and level measurement accuracy stability to hob. Can be carried out after cement mortar solidified the installation of distribution box (plate).
Metal bolts fixed distribution box (dish)
Use a metal bolts can be fixed on the concrete wall or brick wall distribution box (plate). Its method is according to the requirements of clause 15.4.2 flare line positioning, find out the accurate mounting position with a drill or percussion drill hole in the mounting position, its aperture should just buried metal pipe expanding part of the expansion bolt inside the wall, and the hole should be straight not skewed.
3.5 distribution box (dish) processing:
Disk can use thick plastic, wood or steel armored. USES the steel plate do disk, for example, will the steel plate according to the size with feet to take measurements, draw after cutting line cutting. After cutting with a flat file to make the rough edges smooth.
Disk group assembly line is as follows:
3.5.1 track of physical arrangement: the disk plate flat, again puts all electrical appliance, instrument, its physical arrangement. Control design and electrical appliance, instrument specifications and quantity, choose the best position to make it conform to the requirements of the spacing, and ensure the appearance and convenient operation and maintenance.
3.5.2 processing: position is determined, using the feet to look positive, draw a horizontal line, pitch points. Then removed the electricity, instrument, borehole (aperture should coincide with insulation mouth). Bored after rust removal, paint brush anti-rust paint and ashes.
3.5.3 fixed electrical appliance: paint dry after mount insulation mouth, and all the electrical appliance, instrument balance, alignment, screwed firmly.
3.5.4 panel wiring; According to the specifications, capacity and electrical appliance, instrument, choose good conductor cross section and length, cut to piece together. After wire should be neat, tie into a bundle. Head, will lead to set aside the appropriate allowance, cut wire core, one at a pressure. But need more thread wire terminals. Such as vertical plate, shall, first of all, the fixed disk plate after opening, and then to carry on the wiring.
Fixed: 3.6 distribution box (disc)
3.6.1 track on the concrete wall or brick wall fixed Ming assembling electrical box (plate), using dark piping and dark junction box and piping in two ways. If there are any cable box, box cleaning to clean first, and then wire straightening out, distinguish between branch and phase sequence and the branch tie into a bundle. After being box (plate) for position, the end of the wire leads to or tray in the oven, exploitation of wire end individually, then one by one on the equipment, pressure at the same time the PE protective ground pressure in obvious places, and adjust the box (disc) straight after fixation. In electrical appliance, instrument more disk plate after the installation, should use instrument first proofread for errors, adjust and correct after hours.then, the card in the box and the CARDS will fill out the part number,.
3.6.2 on wood or light steel keel to protect the wall fixed distribution box (plate), the reinforcement measures should be adopted. Such as piping in dark laying inside the wall, and has a dark box, the requirement of jar should be flush with metope, fire prevention should be done in the wooden wall protection, can add fire retardant paint or coating fireproof lining material for protection. In addition to the above requirements, the fixed method as above mentioned.
Dark electrical box assembly is fixed:
According to the reserved hole size box to find good elevation and level size first, and to fasten on body, and then filled with cement mortar around and flush, after waiting for cement mortar solidification installation disk and stick a face again. Leveled, such as the bottom and wall should be in exterior wall plaster metal mesh and then take wall. Shall not be in the cases of plaster on the floor. Install disk request level off, the peripheral clearance even symmetry, stick a face (door) a right, not skewed, screw vertical force uniform.
Insulation shake test:
Distribution box (dish) all electric equipment after the installation, use 500 v megohmmeter insulation shake test was carried out on the line. Shake test project including phase line and between phase line, between the wire and neutral wire, wire and protect the earth, between neutral and protect the earth. Two people shake test, recorded at the same time, as a technical data archive.
4 quality standards
4.1 ensure projects:
Low voltage power distribution equipment, earthing protection and other safety requirements must comply with the rules and regulations of construction acceptance.
Inspection method: to observe the inspection and check the installation records.
4.2 the basic items:
2 distribution box installation shall meet the following requirements:
Position correctly, the parts is complete, the box body opening, appropriate incision neatly. Dark type distribution box lid is clingy metope; Neutral line by bus (N terminal) connection, no splicing phenomenon; Paint a complete, both inside and outside clean, lid, switches, flexible circuit number is complete, the connection and tidy, PE protect earth concatenated installation clear and firm, wire section, line color conform to the requirement of specification.
Inspection method: to observe the examination.
4.2.2 wires connected to the equipment shall meet the following requirements:
4.2.2.1 connect closely, it does not hurt wire core. Clamp connection pressure without loose; Bolt connection, the conductor is not more than two, on the same terminal fittings such as check washer is complete.
4.2.2.2 electrical equipment, instruments, and the charged metal parts of protective earthing feeder installation shall meet the following requirements: compact connection, strong, choose correct protective earthing line section, anticorrosive parts of the paint evenly without omission. Line to the reasonable, color standard, after besmear is not contaminated equipment and buildings.
Inspection method: to observe the examination.
4.3 allowable deviation:
Distribution box (pan) under high 50 mm, allowable deviation of 1.5 mm.
Distribution box (dish) more than 50 mm high, allowable deviation of 3 mm.
Test method: messenger wire, feet quantity check.
5 finished product protection
5.1 distribution box (disc) after installation, finished product protection measures should be taken to avoid bad, dirty electrical appliance, instrument.
5.2 installation box (disc) panel (or face), maintain a clean and tidy metope should be paid attention to.
5.3 civil secondary spray, be careful not to pollution distribution box (plate).
6 should pay attention to quality problems
6.1 distribution box (disc) exceed the allowable deviation of elevation or vertical degree, is due to the measurement position is not accurate or is caused by uneven ground, shall be revised in a timely manner.
6.2 the hob founder. Before installing the hob without straightening alignment, or install mounting position offset, application of messenger wire find is fixed once again.
6.3 disk electrical appliance, instrument is not strong, a right or uneven spacing, head, head wound wire core, multi-strand wire head did not install wire terminals. Brake not pack card box below. Should tighten the screw is not tight, uniform spacing should be adjusted according to the requirement, looking for a flat. Wound wire core part should be cut again, multi-strand wire should be put on wire terminals, card box should do their make-up.
Insufficient or protection of ground wire section 6.4 earthing conductor cross section, protect the earth concatenated. For these is not in conformity with the requirements shall be in accordance with the relevant provisions of the correction.
6.5 after wiring arrangement not neat. Should be according to the colligation bundle branch and fixed in the disc.
6.6 distribution box (disc) lack of spare parts, such as hinges, locks, screws, etc., should match neat all sorts of install the required components.
Around 6.7 distribution box, the bottom, pipe into the box, the gap is too large, empty drum is serious, the application will empty drum place filled with cement mortar.
6.8 wooden case outside anti-corrosion, wall rough wooden internal repair should level off, both inside and outside do anticorrosive processing, and fire prevention measures should be taken into account.
6.9 iron walls spot corrosion, should fill brush anti-rust paint. Iron box should not be allowed to open hole, electricity (gas) welding core should be adopted for opening.
6.10 distribution in the plate on the second floor and improper handling, inlet and outlet piping position caused by wiring arrangement is not neat, when installing a distribution box should be considered into line with tube mouth position should be set on the second floor board.
7 quality records
7.1 distribution box (dish), insulation wire factory quality certificate.
7.2 distribution box (disc) installation engineering, self-inspection, mutual inspection records.
7.3 design changes regarding the record, record drawings.
7.4 electrical insulation resistance test records.
7.5 electric lighting apparatus and its distribution box (dish) installation engineering quality inspection record separately.
1 scope
The technology standard is applicable to building electrical distribution box (dish) installation.
2 construction preparation
2.1 material requirements:
2.1.1 iron distribution box (disc) : housing should have a certain mechanical strength and the surrounding flat no damage, no paint falls off, second floor slab thickness is not less than 1.5 mm, but not do second floor adopts the flame retardant plastic, all kinds of instruments shall be installed in the firm, wires neatly, firm pressure, should be two appointed product, and product certification.
2.1.2 plastic distribution box (dish) : housing should have a certain mechanical strength. Surrounding flat without damage, plastic floor slab thickness should not be less than 5 mm, with product certificate.
2.1.3 wooden distribution box (disc) : should brush anti-corrosion, fireproofing coatings, wooden plate area should not be less than 20 mm thick.
2.1.4 materials for galvanized Angle steel, flat iron, sheet metal, machine screws, wood screws, bolts, washers, round nails, etc.
2.1.5 insulation wire, wire specifications must comply with the design requirements, and product certification.
2.1.6 other materials: electrical instrumentation, fuse (or melt), terminal board, insulation mouth, aluminum casing, card box, soft plastic tube, wood and brick nail, plastic belt, black tape, antirust paint, grey paint, solder, flux, welding electrode (or calcium carbide, oxygen), cement and sand.
2.2 the main equipment:
2.2.1 pencil, tape measure, meters, level, steel ruler, line drop shovel, bucket, brushes, ash, etc.
2.2.2 hammer and chisel, hacksaw blade, wood file, flat file, round file, stripping pliers, long nose pliers, crimping pliers, live wrench, socket wrench, tin tin pot, spoon, etc.
2.2.3 bench drill, drill, drill bit, auger, vise, case, nail gun, electric furnace, electricity, gas welding tools, insulating gloves, iron scissors, punch, megohmmeter, tool bag, toolbox, high stool, etc.
2.3 operation conditions:
2.3.1 with good civil structure reserved dark assembly electric box installation location.
2.3.2 hob or embedded bolt, the wall structure construction horizontal line should pop up.
2.3.3 distribution box installation disk, plaster, spray and paint should be complete.
3 operation process
3.2 distribution box (disc) installation requirements:
3.2.1 distribution box (plate) shall be installed in a safe, dry, easy to operate. Distribution box (dish) when installation, its bottom is apart from the average of 1.5 m; With the mouth from the bottom to 1.2 m; With the mouth from the meter board base shall not be less than 1.8 m. In the same building, the height of the similar plate should be consistent, allowable deviation for 10 mm.
3.2.2 installation distribution box (dish) for iron and wood brick shall be embedded. Exo distribution box (disc) should be used metal expansion bolt.
3.2.3 iron distribution box (disc) must first brush anti-rust paint again, gray paint is brushed again two way. Various embedded iron all should brush anti-rust paint, and make clear and reliable grounding. Conductor which leads to the panel, panel line hole should be smooth and no burr, metal plate should be installed insulating case.
3.2.4 instruments (disc) distribution box with iron disk and a metal shell of the door of the appliance and electrical shall have clear and reliable PE protection of ground wire (PE line of yellow and green double color line also can adopt soft ground wire weaving), but the PE protection ground wire is not allowed to use box or concatenated box body.
3.2.5 distribution box (disc) wiring neat rows, and tie them into bundles and parts should be fixed in the activity. Disk derivation and imported wire should have appropriate redundant, in order to facilitate maintenance.
3.2.6 conductor exploitation should not hurt wire core or wire core is too long, wire head should be solid and reliable, multi-strand wire should not be disc circle pressure, should be equipped with wire terminals (except of line pressing hole). Such as must be perforated with top silk, the pressure to the multi-strand wire should be rinse again after tin, pressure may reduce wire number of shares.
3.2.7 distribution box (disc) automatic disk installed on all kinds of breaker and switch, etc., when in the open circuit state, blade movable parts should not be charged (except for special cases).
3.2.8 vertical installed and fuse breaker electrical top to connect power, lower load. Lateral left (facing the disk) to connect power, the right side of the load.
3.2.9 distribution box (plate) on the power indicator light, the power supply connected to the outer edge of the master switch, and should be a separate fuse (supply side). Disk brake position should correspond to branch, it shall be installed under the card box, indicate the way don't and capacity.
3.2.10 TN - C in the low-voltage distribution system neutral N should be on the box body or disk, the introduction of repeat grounding grounding line.
3.2.11 lighting distribution box (board), dc or different voltage grade of power, and has obvious signs.
3.2.12 lighting distribution box (board) should not be made of combustible materials in a dry clean place the wooden panel box (board) should be flame retardant processing.
3.2.13 lighting distribution box (board), should be set respectively neutral line N and the protection of ground wire (PE) bus, neutral line N and the protection of ground wire should be on the bus connection, splicing, and should be numbered.
Bare 3.2.14 magnetic plug fuse base center screw holes should be filled with insulation, to prevent the discharge. Magnetic plug insurance shall not be bare metal screws, should fill seal.
3.2.15 lighting distribution box (board) installed inside the spiral can fuse the power line in the middle of contact terminals, load line up on the thread of the terminal.
3.2.16 used materials and phase line phase at the same time as PE line should choose according to the requirements of the thermal stability of section should not be less than shown in table 3-38.
Minimum cross section table 3-38 PE line
Phase lines S core section
(was) PE line minimal cross section
(was) lines S core section
(was) PE line minimal cross section
(was)
S 16 S 35 S/S > 2 or less
16 S 35 16 or less or less
Note: use this form if it is concluded that cross section, should choose the most close to the standard cross section of conductor. But shall not be less than: 4 was bare copper wire, bare
Aluminium wire was 6, 1.5 was insulated copper wire, aluminum wire insulation was 2.5.
3.2.17 PE protection ground if it is not part of the power supply cable or cable outer sheath, according to the requirements of mechanical strength, the section should not be less than the following values:
Have a mechanical protection was 2.5; 4 was no mechanical protection.
3.2.18 distribution box (plate) on the bus the phase lines shall be marked with color, A phase (L1) should be painted yellow; B phase (L2) should be painted green; Phase C (L3) should be painted red; Neutral N corresponding painted light blue; Protection of ground wire (PE) should be painted yellow and green double color.
3.2.19 distribution box (plate) on electrical appliance, instrument should be strong, a right, neat, uniform spacing, copper terminals without looseness, the opening and closing flexible, complete parts. The arrangement spacing should be consistent with table 2-39.
3.2.20 lighting distribution box (board) should be installed firmly, levelled, the vertical deviation should not be greater than 3 mm; When installation, lighting distribution box (board), should be no gap around the panels around the edges should be clingy metope, boxes and buildings and other structures contact parts should be painted anticorrosive paint.
3.2.21 wooden disk plate should be tested for fire prevention corrosion, and should be wrapped iron, clear and reliable grounding;
3.2.22 fixed panel machine screw, should use galvanized round cap machine screw, the spacing shall not be greater than 250 mm, and should be symmetrical in the four corners equably.
3.2.23 (plate) for the larger panel, distribution box should strengthen lining iron, when more than 500 mm width, the door should have a double door.
3.2.24 vertical plate back away from the building should be not less than 800 mm; Basic sections before installation should be buried after straightening is fixed, the level of error should be not more than 1 mm per meter, total length of the total error is not more than 5 mm. The bottom of the disk mouth should not be less than 500 mm off the ground. Hob with the switchboard distance buildings should be easy maintenance.
3.2.25 vertical plate should be located within a dedicated room or add fence, grating should be grounded.
3.3 play line positioning:
According to design requirements to find distribution (dish) position, and shall be carried out in accordance with the box (dish) dimension elastic line positioning; Is the purpose of the positioning of the elastic line with embedded brick wood or iron, can more accurately find out the embedded parts, or you can find out the location of the metal tube expanding bolt.
3.4 Ming assembling electrical box (dish).
Hob fixed distribution box (dish)
Will bar straightening, measure good measure, draw line curf, sawing simmer bending, drilling, welding. Simmer find is bent on feet, electricity (gas) welding, the counterpart seam weld, and buried dovetail note side make it, then derusting, brush anti-rust paint. Again according to the elevation of the hob dovetail with cement mortar will be buried side note, when embedded to pay attention to the flat degree of hob and the distance between holes, again after application line falling and level measurement accuracy stability to hob. Can be carried out after cement mortar solidified the installation of distribution box (plate).
Metal bolts fixed distribution box (dish)
Use a metal bolts can be fixed on the concrete wall or brick wall distribution box (plate). Its method is according to the requirements of clause 15.4.2 flare line positioning, find out the accurate mounting position with a drill or percussion drill hole in the mounting position, its aperture should just buried metal pipe expanding part of the expansion bolt inside the wall, and the hole should be straight not skewed.
3.5 distribution box (dish) processing:
Disk can use thick plastic, wood or steel armored. USES the steel plate do disk, for example, will the steel plate according to the size with feet to take measurements, draw after cutting line cutting. After cutting with a flat file to make the rough edges smooth.
Disk group assembly line is as follows:
3.5.1 track of physical arrangement: the disk plate flat, again puts all electrical appliance, instrument, its physical arrangement. Control design and electrical appliance, instrument specifications and quantity, choose the best position to make it conform to the requirements of the spacing, and ensure the appearance and convenient operation and maintenance.
3.5.2 processing: position is determined, using the feet to look positive, draw a horizontal line, pitch points. Then removed the electricity, instrument, borehole (aperture should coincide with insulation mouth). Bored after rust removal, paint brush anti-rust paint and ashes.
3.5.3 fixed electrical appliance: paint dry after mount insulation mouth, and all the electrical appliance, instrument balance, alignment, screwed firmly.
3.5.4 panel wiring; According to the specifications, capacity and electrical appliance, instrument, choose good conductor cross section and length, cut to piece together. After wire should be neat, tie into a bundle. Head, will lead to set aside the appropriate allowance, cut wire core, one at a pressure. But need more thread wire terminals. Such as vertical plate, shall, first of all, the fixed disk plate after opening, and then to carry on the wiring.
Fixed: 3.6 distribution box (disc)
3.6.1 track on the concrete wall or brick wall fixed Ming assembling electrical box (plate), using dark piping and dark junction box and piping in two ways. If there are any cable box, box cleaning to clean first, and then wire straightening out, distinguish between branch and phase sequence and the branch tie into a bundle. After being box (plate) for position, the end of the wire leads to or tray in the oven, exploitation of wire end individually, then one by one on the equipment, pressure at the same time the PE protective ground pressure in obvious places, and adjust the box (disc) straight after fixation. In electrical appliance, instrument more disk plate after the installation, should use instrument first proofread for errors, adjust and correct after hours.then, the card in the box and the CARDS will fill out the part number,.
3.6.2 on wood or light steel keel to protect the wall fixed distribution box (plate), the reinforcement measures should be adopted. Such as piping in dark laying inside the wall, and has a dark box, the requirement of jar should be flush with metope, fire prevention should be done in the wooden wall protection, can add fire retardant paint or coating fireproof lining material for protection. In addition to the above requirements, the fixed method as above mentioned.
Dark electrical box assembly is fixed:
According to the reserved hole size box to find good elevation and level size first, and to fasten on body, and then filled with cement mortar around and flush, after waiting for cement mortar solidification installation disk and stick a face again. Leveled, such as the bottom and wall should be in exterior wall plaster metal mesh and then take wall. Shall not be in the cases of plaster on the floor. Install disk request level off, the peripheral clearance even symmetry, stick a face (door) a right, not skewed, screw vertical force uniform.
Insulation shake test:
Distribution box (dish) all electric equipment after the installation, use 500 v megohmmeter insulation shake test was carried out on the line. Shake test project including phase line and between phase line, between the wire and neutral wire, wire and protect the earth, between neutral and protect the earth. Two people shake test, recorded at the same time, as a technical data archive.
4 quality standards
4.1 ensure projects:
Low voltage power distribution equipment, earthing protection and other safety requirements must comply with the rules and regulations of construction acceptance.
Inspection method: to observe the inspection and check the installation records.
4.2 the basic items:
2 distribution box installation shall meet the following requirements:
Position correctly, the parts is complete, the box body opening, appropriate incision neatly. Dark type distribution box lid is clingy metope; Neutral line by bus (N terminal) connection, no splicing phenomenon; Paint a complete, both inside and outside clean, lid, switches, flexible circuit number is complete, the connection and tidy, PE protect earth concatenated installation clear and firm, wire section, line color conform to the requirement of specification.
Inspection method: to observe the examination.
4.2.2 wires connected to the equipment shall meet the following requirements:
4.2.2.1 connect closely, it does not hurt wire core. Clamp connection pressure without loose; Bolt connection, the conductor is not more than two, on the same terminal fittings such as check washer is complete.
4.2.2.2 electrical equipment, instruments, and the charged metal parts of protective earthing feeder installation shall meet the following requirements: compact connection, strong, choose correct protective earthing line section, anticorrosive parts of the paint evenly without omission. Line to the reasonable, color standard, after besmear is not contaminated equipment and buildings.
Inspection method: to observe the examination.
4.3 allowable deviation:
Distribution box (pan) under high 50 mm, allowable deviation of 1.5 mm.
Distribution box (dish) more than 50 mm high, allowable deviation of 3 mm.
Test method: messenger wire, feet quantity check.
5 finished product protection
5.1 distribution box (disc) after installation, finished product protection measures should be taken to avoid bad, dirty electrical appliance, instrument.
5.2 installation box (disc) panel (or face), maintain a clean and tidy metope should be paid attention to.
5.3 civil secondary spray, be careful not to pollution distribution box (plate).
6 should pay attention to quality problems
6.1 distribution box (disc) exceed the allowable deviation of elevation or vertical degree, is due to the measurement position is not accurate or is caused by uneven ground, shall be revised in a timely manner.
6.2 the hob founder. Before installing the hob without straightening alignment, or install mounting position offset, application of messenger wire find is fixed once again.
6.3 disk electrical appliance, instrument is not strong, a right or uneven spacing, head, head wound wire core, multi-strand wire head did not install wire terminals. Brake not pack card box below. Should tighten the screw is not tight, uniform spacing should be adjusted according to the requirement, looking for a flat. Wound wire core part should be cut again, multi-strand wire should be put on wire terminals, card box should do their make-up.
Insufficient or protection of ground wire section 6.4 earthing conductor cross section, protect the earth concatenated. For these is not in conformity with the requirements shall be in accordance with the relevant provisions of the correction.
6.5 after wiring arrangement not neat. Should be according to the colligation bundle branch and fixed in the disc.
6.6 distribution box (disc) lack of spare parts, such as hinges, locks, screws, etc., should match neat all sorts of install the required components.
Around 6.7 distribution box, the bottom, pipe into the box, the gap is too large, empty drum is serious, the application will empty drum place filled with cement mortar.
6.8 wooden case outside anti-corrosion, wall rough wooden internal repair should level off, both inside and outside do anticorrosive processing, and fire prevention measures should be taken into account.
6.9 iron walls spot corrosion, should fill brush anti-rust paint. Iron box should not be allowed to open hole, electricity (gas) welding core should be adopted for opening.
6.10 distribution in the plate on the second floor and improper handling, inlet and outlet piping position caused by wiring arrangement is not neat, when installing a distribution box should be considered into line with tube mouth position should be set on the second floor board.
7 quality records
7.1 distribution box (dish), insulation wire factory quality certificate.
7.2 distribution box (disc) installation engineering, self-inspection, mutual inspection records.
7.3 design changes regarding the record, record drawings.
7.4 electrical insulation resistance test records.
7.5 electric lighting apparatus and its distribution box (dish) installation engineering quality inspection record separately.
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