CN207021033U - low-voltage cable - Google Patents
low-voltage cable Download PDFInfo
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- CN207021033U CN207021033U CN201720880048.5U CN201720880048U CN207021033U CN 207021033 U CN207021033 U CN 207021033U CN 201720880048 U CN201720880048 U CN 201720880048U CN 207021033 U CN207021033 U CN 207021033U
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Abstract
It the utility model is related to a kind of low-voltage cable.A kind of low-voltage cable, it includes multiple conductive cores, and conductive core includes electric conductor, and insulating barrier, screen layer and the first braiding layer being wrapped in successively from the inside to the outside on electric conductor；Multiple conductive cores form conductive core group；From the inside to the outside, conductive core group is wrapped up by inner protective layer, the second braiding layer and external protection successively；Packed layer is provided between multiple conductive cores.The low-voltage cable has good mechanical strength, and has resistant to elevated temperatures feature.
Description
Technical field
It the utility model is related to a kind of low-voltage cable.
Background technology
The function of power cable is to transmit and distribute electric energy in power system.Power cable is a kind of reliable all insulation
Product, validity period typically require more than 40 years, for some ancillary engineering facility power cables, if the equipment rebuilding time limit is less than 15
Year, it is contemplated that cable is changed, now cable service life was contemplated that not less than 20 years.
With the popularization and application of cable technology, low-voltage cable makes the fields such as construction, industrial production, decorations
With more frequently, it is correspondingly also higher to the technical requirements of low-voltage cable.At present, there is mechanical strong for existing low-voltage cable
Spend low, it is impossible to meet bending, the extruding under mal-condition, have impact on use range；
High temperature resistance is unable to, have impact on the using effect under high temperature place or hot weather.
Utility model content
The purpose of this utility model is to provide a kind of low-voltage cable, its can high temperature resistant, and there is good machinery
Intensity.
What embodiment of the present utility model was realized in：
A kind of low-voltage cable, it includes multiple conductive cores.Conductive core includes electric conductor, and is wrapped in successively from the inside to the outside
Insulating barrier, screen layer and the first braiding layer on electric conductor.Multiple conductive cores form conductive core group.From the inside to the outside, conductive core group
Wrapped up successively by inner protective layer, the second braiding layer and external protection.Packed layer is provided between multiple conductive cores.
During low-voltage cable transmits electric power, electric conductor play a part of carry electric power, insulating barrier by electric conductor with
Cable others partial obstruction is separated, and on the one hand electric power is maintained in electric conductor, on the other hand protects the safe to use of cable.
Screen layer is by adhering on the insulating layer, it would be possible to the existing excessive shielding barrier of electric power, while also function to the work of ground protection
With.First braiding layer then plays the function of enhancing cable machinery intensity and resistance to pressure.Above structure collectively constitutes conductive core.It is multiple
Conductive core forms conductive core group again.In conductive core group, the space between multiple conductive cores is filled up by packed layer.Such structure
The multiple electric conductors for being responsible for power Transmission can be caused to form protection location (conductive core group), so as to obtain the guarantee of first layer.
It is provided with inner protective layer outside conductive core group, inner protective layer is protected by wrapping up conductive core group cable and compensator or trimmer pressure
Effect.The second braiding layer set on inner protective layer causes cable to possess resistant to elevated temperatures feature.Finally, external protection is then prevented
Only low-voltage cable in installation, laying and extruding in, penetrate and the outer damage to caused by cable such as wear.
In a kind of embodiment of the present utility model, electric conductor is quad made of copper conductor and/or tinned copper conductor.
In a kind of embodiment of the present utility model, the cross sectional shape of core is circle.
In a kind of embodiment of the present utility model, the cross sectional shape of conductive core is circular for a quarter, conductive core four
It is individual；Four conductive cores collectively form cross sectional shape as circular conductive core group.
In a kind of embodiment of the present utility model, insulating barrier includes XLPE insulating barriers.
In a kind of embodiment of the present utility model, insulating barrier includes insulating lacquer layer.
In a kind of embodiment of the present utility model, the material of the first braiding layer is copolymerized for acrylonitrile-butadiene-styrene (ABS)
Thing.
In a kind of embodiment of the present utility model, the material of the second braiding layer is carbon steel wire.
In a kind of embodiment of the present utility model, external protection includes asphalt corrosion resistant layer.
In a kind of embodiment of the present utility model, external protection includes steel-tape armouring and wire armoring is mutually wrapped and formed
Armouring group.
The beneficial effect of the utility model embodiment is：
The effect of low-voltage cable is that its first braiding layer possesses good mechanical strength, and cable can be allowed to need to hold
By certain pressure, need to bend, need to pull when keep stabilization to be worked.Second braiding layer has the effect of high temperature resistance
Fruit so that cable can also can be good in the case of high temperature place or the contour temperature of hot weather work.Electric conductor is passed through into bag
Tie up to form conductive core, then conductive core group is formed after will packed layer be set between multiple conductive cores, so both ensure that the biography of electric conductor
Defeated effect, also so that being connected between multiple conductive cores even closer.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
Fig. 1 is the first structural representation of the mesolow cable of the utility model embodiment 1；
Fig. 2 is second of structural representation of the mesolow cable of the utility model embodiment 1；
Fig. 3 is the structural representation of the mesolow cable of the utility model embodiment 2.
Icon：100- low-voltage cables；110- conductive core groups；112- conductive cores；1121- electric conductors；1122- insulating barriers；
1123- screen layers；The braiding layers of 1124- first；120- inner protective layers；121- inner liners；122- separation sleeves；130- second weaves
Layer；140- external protections；141- armourings；142- oversheaths；143- asphalt corrosion resistant layers；150- packed layers.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Generally here described in accompanying drawing and
The component of the utility model embodiment shown can be configured to arrange and design with a variety of.
Therefore, the detailed description of the embodiment of the present utility model to providing in the accompanying drawings is not intended to limit requirement below
The scope of the utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
, it is necessary to explanation, the orientation of the instruction such as term " on ", " under ", " interior ", " outer " in description of the present utility model
Or position relationship be based on orientation shown in the drawings or position relationship, or the utility model product using when usually put
Orientation or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.In addition, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that indicating or implying relatively important
Property.
In description of the present utility model, it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set
Put ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in utility model.
Embodiment 1
Fig. 1 is refer to, the present embodiment provides a kind of low-voltage cable 100, and it includes conductive core group 110, interior guarantor from inside to outside
Sheath 120, the second braiding layer 130, external protection 140.
Conductive core group 110 is made up of four conductive cores 112.Each conductive core 112 includes electric conductor 1121, Yi Jiyou
The interior and outer insulating barrier 1122 being wrapped in successively on the outer peripheral face of electric conductor 1121, the braiding layer 1124 of screen layer 1123 and first.
Electric conductor 1121 is the quad that copper conductor is twisted.It should be noted that the material of electric conductor 1121 here
Material is not limited only to copper or aluminium conductor, tinned copper conductor or copper conductor mixes what is formed with tinned copper conductor, here only
Only it is an example.Likewise, the core of electric conductor 1121 is also not limited to four cores, here as just an example.
Four conductive cores 112 are twisted into conductive core group 110.
In conductive core group 110, packed layer 150 is provided between four conductive cores 112.
Packed layer 150 is restricted for PP.PP ropes are completely filled with four conductive cores 112 in conductive core group 110 by way of extruding
Between space.
It should be noted that the material of packed layer 150 can also be polyester belt, tinfoil paper band, spin synthetic fibre silk, glass fiber,
Any one in cotton thread, the rope made of hemp, as long as packed layer 150 can be fully full of the space between four conductive cores 112.
The cross sectional shape of every conductive core 112 is all circle, and the area in the section of every conductive core 112 is all equal.
It should be noted that the number of the conductive core 112 in conductive core group 110 is not limited only to 4, conductive core 112 is cut
Face area can not be all equal, here an only example.
The material of insulating barrier 1122 is plastic insulation material.
Simple using the construction of cable of plastic insulation, manufacture is easy to process, in light weight, and laying installation is convenient, is not laid
Drop limits.It should be noted that plastic insulation material can also be polyvinyl chloride, polyethylene, crosslinked polyethylene or use resistance to
Polyvinyl chloride, polyethylene, the compound that crosslinked polyethylene is base material of time type.
Specifically, in the present embodiment, the plastic insulating layer is polyvinyl chloride insulation layer.Polyvinyl chloride possesses preferably anti-
Drawing, bending resistance, resistance to compression and impact resistance, it can individually be used as structural material.
Insulating barrier 1122 can also be rubber insulation, as EP rubbers (EPR) insulation, hard EP rubbers (HEPR) are exhausted
Edge.Rubber-covered has a softness, high resilience, be suitable for it is mobile frequently, laying bending radius small occasion the characteristics of.
Insulating barrier 1122 can also be oil-impregnated paper insulation layer.Oil-impregnated paper insulation has safe and reliable, service life length, price
The characteristics of cheap.
Insulating barrier 1122 can also be insulating lacquer layer.Insulated paint can fill gap and the micropore of electric conductor 1121, insulation
The paint film of continuous formation can be formed on the surface of electric conductor 1121 after paint solidification, and it is bonded to a solid entirety, to carry
The performances such as the moisture resistance of high insulation system, heat conduction, breakdown strength and mechanical strength.
Insulating barrier 1122 can also be mica.Particularly synthetic mica tape, the synthetic mica tape pass through wrapped mode
Wrap up in and be tied on electric conductor 1121.
Screen layer 1123, the screen layer 1123 are semiconducting paper band, and the semiconducting paper band is wrapped up in by way of bonding to be tied to
On insulating barrier 1122.
Due to easily forming air gap, the table of electric conductor 1121 between the electric conductor 1121 and insulating barrier 1122 of low-voltage cable 100
Face is rough, electric field can be caused to concentrate, and these can all cause cable that partial discharge phenomenon occurs in galvanization.Screen layer
1123 one side play a part of protection, insulated electric conductor 1121, and on the other hand it is insulating with the good contact of insulating barrier 1122
1122 surface of layer form equipotential, it is possible to prevente effectively from local put occurs between the braiding layer 1124 of insulating barrier 1122 and first
Electricity.
Semiconducting paper can also use the form extruded to be connected with insulating barrier 1122.When extruding, by conducting paper equably
It is coated on insulating barrier 1122, the surface of insulating barrier 1122 should be smooth, should not have wedge angle, particle, burn or abrasive vestige.
It should be noted that screen layer 1123 can also use MP metallized paper, outer bundle copper strips, braiding copper wire band, tin-coated copper
Net is formed.
First braiding layer 1124 is made up of acrylonitrile-butadiene-styrene copolymer of hard weave.Acrylic nitrile-butadiene two
Alkene-styrol copolymer, i.e. ABS plastic, because it has good mechanical performance, rigidity is high, hardness is big, good stability of the dimension.
First braiding layer 1124 is sticked on screen layer 1123 by stickum.The stickum can be viscose glue, impregnating varnish or its
Its stickum, as long as can be by braiding layer good adhesion between each other.It should be noted that the material of the first braiding layer 1124
Material is not limited to acrylonitrile-butadiene-styrene copolymer, can also be PET, PBT etc., here an only example.
Inner protective layer 120 includes inner liner 121 and separation sleeve 122, and separation sleeve 122 is arranged on outside inner liner 121.
Inner liner 121 is twining package tape, and the twining package tape is PPD twining package tapes.PPD twining package tapes are wrapped up in be tied to by wrapped mode leads
In battery core group 110, contacted with the first braiding layer 1124.On twining package tape and the contact surface of the first braiding layer 1124, it can also apply
Stickum is covered, can thus increase the adhesive force between twining package tape and the first braiding layer 1124.
To extrude band, this extrudes band and extrudes band for non-woven fabrics separation sleeve 122.Non-woven fabrics extrudes band and wrapped up in by way of extruding
It is tied on inner liner 121.
Second braiding layer 130 is made up of the soft weave of carbon steel wire.It should be noted that the material of the second braiding layer 130 may be used also
To be coppered steel wire, zinc-coated wire, stainless steel wire etc..Such low-voltage cable 100 on the one hand can with high temperature resistance, be unlikely to deform,
On the other hand possesses higher mechanical strength.
External protection 140 includes armouring 141 and oversheath 142.
Armouring 141 is the armouring group that steel-tape armouring and wire armoring mutually wrap.Such structure composition steel band
The advantages of armouring and wire armoring.On the one hand a certain degree of mechanical pressure can be born, on the other hand can also met certain
The requirement of mechanical tensile forces.The steel-tape armouring and steel wire armoured material are galvanized steel.
It should be noted that the material of steel-tape armouring can be aluminium strip, aluminum alloy strip, galvanized steel strip, pre- pitching steel band,
Any one in painted steel band and common cold-rolled strip.
It should be noted that steel wire armoured material can be plastic coating steel wire, zinc-coated wire, stainless steel wire, copper wire or plating
Any one in tin copper wire, copper alloy silk or Tinplated copper alloy silk, aluminium wire or aluminum-alloy wire.
It should be noted that armouring 141 can also be double-tape armor, thin round steel wire armouring, thick round steel wire armouring, non-magnetic
Any one in property metal tape armour, nonmagnetic metal silk armouring, flat wire armour.
The material of oversheath 142 is polyvinyl chloride.Oversheath 142 is the bonding sheath outside 141 layers of armouring, and this sheath both may be used
, again can be as the insulation shielded over the ground using the mechanical protection as cable.The sheath is arranged on armouring by cohesive mode
On 141.It should be noted that the sheath can also be connected on armouring 141 by way of compacting.
It should be noted that oversheath 142 can also be pe sheath, polyolefin jacket, elastic body jacket, metal foil
Composite jacket, lead set in any one.
It should be noted that protection sleeve pipe can also be set up outside oversheath 142.Protection sleeve pipe be using polyethylene and
High-quality steel pipe is made by the pre-treatment of sandblasting ball blast, leaching modeling or application, heating cure technique.Protection sleeve pipe uses spigot-and-socket
Connected mode be connected with oversheath 142, convenient installation connection.Joint adds rubber seal envelope both to adapt to expand with heat and contract with cold, again
Prevent silt particle from entering.
Protection sleeve pipe has that insulating properties are good, chemical stability is high, non-corrosive, not aging, are suitable for severe rugged environment
Feature, thus considerably increase corrosion resistance, heat resistance, anti-interference and the mechanical strength of low-voltage cable 100.
It should be noted that the braiding layer 130 of the first braiding layer 1124 and/or second is one or more layers structure.When first
When the braiding layer 130 of braiding layer 1124 and/or second is sandwich construction, it is necessary to after the completion of every layer is woven, the table in the braiding layer
Face on last layer braiding layer outer surface with coating stickum.Stickum weaves again after two layers of braiding layer is bonded firmly completely
Next layer, and it is in the same way that it is Nian Jie with last layer braiding layer, so to increase the adhesive force of interlayer, prevent from using
Middle generation delamination.
It is circular for a quarter as a kind of preferably embodiment, reference picture 2, the cross sectional shape of conductive core 112, it is conductive
Core 112 is four.The area of section of four conductive cores 112 is identical.It is circular that four conductive cores 112, which collectively form cross sectional shape,
Conductive core group 110.Because four conductive cores 112 closely connect so that the structure of conductive core group 110 is more firm.
It should be noted that in order to increase the water preventing ability of cable, can outside each conductive core 112 it is wrapped one or more layers
Waterstop.So, after inner protective layer 120, which damages, intakes, waterstop will water-swellable., can be very after waterstop expands
It is fast to form the section that blocks water, prevent the further infiltration of water.
Low-voltage cable 100 in the present embodiment has ensured the stability of its power Transmission, the first braiding layer in structure
1124 and second combination of the braiding layer 130 in structure ensured the resistant to elevated temperatures effect of low-voltage cable 100, and the second braiding layer
130 solve the problems, such as the general low intensity of low-voltage cable 100 and yielding.Meanwhile wire armouring and metal tape armour wrap
The armouring group of formation adds the intensity of cable, protects cable the injury such as do not worn, penetrated, extruded by external environment.Increase
Protection sleeve pipe further enhance high pressure resistant, the resistant to elevated temperatures feature of cable, also have corrosion resistant function.Thus
So that the use range of low-voltage cable 100 greatly increases.
Embodiment 2
Fig. 3 is refer to, the present embodiment provides a kind of low-voltage cable 100, its substantially phase of low-voltage cable 100 with embodiment 1
Together, the difference of the two is that the external protection 140 of the low-voltage cable 100 of the present embodiment also includes asphalt corrosion resistant layer 143.
Asphalt corrosion resistant layer 143 is one layer of cable asphalt coated in the outside of armouring 141, is damaged to prevent cable jacket 142
Moisture content immerses afterwards.Simultaneously as armouring 141 is made up of metal, easily it is corroded, asphalt corrosion resistant layer 143 can prevent from protecting outside
Armouring 141 chemically reacts with the acidity in surrounding media or alkali compounds after covering 142 breakages, causes the corruption of armouring 141
Erosion destroys.
It should be noted that in order to increase the corrosion resistance of low-voltage cable 100, can increase by pitch on armouring 141
The anti-corrosion group that anticorrosive coat 143 and mulberry paper combine.
Such low-voltage cable 100 further enhancing the decay resistance of cable, cable can preferably be applied
In etchant gas, corrosive ground, the medium a variety of acid or alkali environments of corrosive liquid.
Embodiment 3
Fig. 1 is refer to, the present embodiment provides a kind of low-voltage cable 100, its substantially phase of low-voltage cable 100 with embodiment 1
Together, the difference of the two is that the insulating barrier 1122 of the low-voltage cable 100 of the present embodiment is made up of XLPE insulating materials.
XLPE insulating materials, i.e. crosslinked polyethylene.Crosslinked polyethylene has the ability of extremely strong anti-deformation at high temperature.Together
When, the electric capacity of crosslinked polyethylene is small, can be effectively reduced charging current and earth-fault current.Crosslinked polyethylene passes through vulcanization method
Wrap up in and be tied on electric conductor 1121.It should be noted that the connected mode of crosslinked polyethylene and electric conductor 1121 is not limited only to vulcanize
Method, here an only example.
Such low-voltage cable 100 has more preferable resistant to elevated temperatures performance, can more broadly be applied to resistant to elevated temperatures field
In institute and environment.
It is insulated paint as a kind of preferably embodiment, insulating barrier 1122, insulated paint is set by way of infiltrating, coating
Put on electric conductor 1121.Insulated paint coats on electric conductor 1121 can form coast of paint film, on the one hand this layer of paint film ensures
Insulating performance of cable, on the other hand ensure that screen layer 1123 can be arranged on smooth, smooth outer surface, has ensured screen layer
1123 shield effectiveness.
In summary, the present embodiment provides a kind of low-voltage cable 100, and it includes multiple conductive cores 112.Conductive core 112 is wrapped
Electric conductor 1121 is included, and insulating barrier 1122, the screen layer 1123 and first being wrapped in successively from the inside to the outside on electric conductor 1121
Braiding layer 1124.Multiple conductive cores 112 form conductive core group 110.From the inside to the outside, conductive core group 110 is successively by inner protective layer
120th, the second braiding layer 130 and external protection 140 wrap up.Packed layer 150 is provided between multiple conductive cores 112.First braiding
Combination of the braiding layer 130 of layer 1124 and second in structure has ensured the resistant to elevated temperatures effect of low-voltage cable 100, and second weaves
Layer 130 solves the problems, such as the general low intensity of low-voltage cable 100 and yielding.So allow for low-voltage cable 100 uses model
Enclose and greatly increase.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the skill personnel in field, the utility model can have various modifications and variations.It is all the spirit and principles of the utility model it
It is interior, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (10)
- A kind of 1. low-voltage cable, it is characterised in that including：Multiple conductive cores, the conductive core include electric conductor, and the insulation being wrapped in successively from the inside to the outside on the electric conductor Layer, screen layer and the first braiding layer；Multiple conductive cores form conductive core group；From the inside to the outside, the conductive core group is wrapped up by inner protective layer, the second braiding layer and external protection successively；Packed layer is provided between multiple conductive cores.
- 2. low-voltage cable according to claim 1, it is characterised in that the electric conductor is that copper conductor and/or tin-coated copper are led Quad made of body.
- 3. low-voltage cable according to claim 1, it is characterised in that the cross sectional shape of the conductive core is circle.
- 4. low-voltage cable according to claim 1, it is characterised in that：The cross sectional shape of the conductive core is that a quarter is circular, and the conductive core is four；Four conductive cores collectively form cross sectional shape as the circular conductive core group.
- 5. the low-voltage cable according to any one in Claims 1 to 4, it is characterised in that the insulating barrier includes XLPE Insulating barrier.
- 6. the low-voltage cable according to any one in Claims 1 to 4, it is characterised in that the insulating barrier includes insulation Enamelled coating.
- 7. the low-voltage cable according to any one in Claims 1 to 4, it is characterised in that the material of first braiding layer Matter is acrylonitrile-butadiene-styrene copolymer.
- 8. the low-voltage cable according to any one in Claims 1 to 4, it is characterised in that the material of second braiding layer Matter is carbon steel wire.
- 9. the low-voltage cable according to any one in Claims 1 to 4, it is characterised in that the external protection includes drip Blue or green anticorrosive coat.
- 10. the low-voltage cable according to any one in Claims 1 to 4, it is characterised in that the external protection includes steel The armouring group mutually wrapped with armouring and wire armoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720880048.5U CN207021033U (en) | 2017-07-19 | 2017-07-19 | low-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720880048.5U CN207021033U (en) | 2017-07-19 | 2017-07-19 | low-voltage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207021033U true CN207021033U (en) | 2018-02-16 |
Family
ID=61481775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720880048.5U Active CN207021033U (en) | 2017-07-19 | 2017-07-19 | low-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207021033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314274A (en) * | 2021-04-20 | 2021-08-27 | 临沂启阳电缆有限公司 | Method for manufacturing polyvinyl chloride insulated non-sheath cable |
-
2017
- 2017-07-19 CN CN201720880048.5U patent/CN207021033U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314274A (en) * | 2021-04-20 | 2021-08-27 | 临沂启阳电缆有限公司 | Method for manufacturing polyvinyl chloride insulated non-sheath cable |
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