WO2006021757A1 - Fire resistant cable and method of manufacture - Google Patents
Fire resistant cable and method of manufacture Download PDFInfo
- Publication number
- WO2006021757A1 WO2006021757A1 PCT/GB2005/003249 GB2005003249W WO2006021757A1 WO 2006021757 A1 WO2006021757 A1 WO 2006021757A1 GB 2005003249 W GB2005003249 W GB 2005003249W WO 2006021757 A1 WO2006021757 A1 WO 2006021757A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fire resistant
- metallic tape
- resistant cable
- fire
- electrical conductor
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Definitions
- This invention relates to a fire resistant cable and method of manufacture.
- this invention relates to a fire resistant cable suitable for use in critical and emergency signal paths, such as, for example, fire alarm systems or emergency lighting, and which provides sufficient resistance to the effects of fire and water.
- MICC Small Insulated Copper Coated
- iyilCC cables are well known in the prior art and consist of copper conductors within a copper external sheath and the void inside the sheath is filled with a mineral insulation of magnesium oxide. This type of cable is virtually indestructible with a high mechanical strength.
- MICC cables are of a high quality and robust, they are much more difficult to install than their soft-skinned counterparts.
- the other main disadvantage is that MICC cable is very inflexible due to its very high mechanical strength.
- Enhanced cables must be used in unsprinklered buildings (i) greater than 30m in height, or (ii) with four or more evacuation zones, or (iii) for example, hospitals or other buildings, where there are horizontal evacuation arrangements, or (iv) where a risk assessment identifies a possible need.
- FIG. 1 The cross section of a prior art soft-skinned fire resistant cable is shown in Figure 1 and comprises typically of annealed copper conductors 10 each within an insulating sheath 14, which generally comprises a microglass tape inner (not shown) and silicon rubber outer (not shown). Typically, an uninsulated circuit protective conductor 12 is also provided. A thin metallic tape or foil 16, which is usually copper, is then rolled around such inner conductors 10, 12, which is then enclosed within a halogen-free fire resistant protective outer sheath 18.
- the current method for covering the inner conductors 10, 12 with the metallic tape 16 is to roll the metallic tape 16 around the inner conductors 10, 12 and a small overlap of around 1mm is bonded to itself and to the protective outer sheath 18.
- the problem associated with this approach is that such design often allows the metallic tape 16 to come apart and bare the inner conductors 10, 12 during a fire condition.
- the fact that such cables are able to meet the requirements of the relevant standards lies in the use of the two-part insulating sheath 14 having a microglass tape inner and silicon rubber outer.
- the integrity of the inner circuit conductors 10 is only maintained by the inner microglass tape wound around each inner conductor 10.
- the use of such a two-part insulating sheath 14 lies in the cost and manufacture of the cable.
- the metallic tape encasing the inner conductors stays intact, such that the inner conductors are not exposed to fire and water, and which may prevent premature failure of the cable.
- the configuration of the metallic tape ensures that the inner conductors are not exposed to fire and water, and, as such, a standard unitary polymer-based insulation can be used for insulating the inner conductor. It is a further object of the present invention to provide a fire resistant cable that has a higher mechanical strength and is more durable than conventional soft-skinned fire resistant cables.
- a fire resistant cable comprising: at least one insulated electrical conductor contained within a fire resistant protective outer sheath; and a metallic tape situated between said at least one insulated electrical conductor and said protective outer sheath, said metallic tape being folded and rolled inwardly at its edge to facilitate increased reliability in a fire condition.
- said at least one insulated electrical conductor comprises an annealed copper conductor having an insulating sheath.
- said insulating sheath comprises a polymer-based insulator having a unitary cross section.
- said insulating sheath comprises silicon rubber.
- a circuit protective conductor is also provided which is uninsulated, and is in direct contact with said metallic tape.
- said metallic tape may be formed from copper or aluminium or any other suitable metallic foil.
- Said metallic tape completely encompasses said at least one insulated electrical conductor and may be double-folded or triple-folded at is edge against itself to prevent the metallic tape opening in a fire condition.
- said fire resistant protective outer sheath may be provided using any suitable halogen-free protective sheath.
- a method of manufacturing a fire resistant cable comprising at least one insulated electrical conductor, comprising the steps of: rolling a metallic tape having first and second longitudinal edges around said at least one insulated electrical conductor into an overlapped abutting configuration; folding said first and second longitudinal edges of said metallic tape back on itself to secure said at least one insulated electrical conductor; rolling said first and second longitudinal edges of said metallic tape inwardly through an angle of at least 180°; and bonding a fire resistant protective outer sheath around said metallic tape.
- the step of rolling said first and second longitudinal edges of said metallic tape inwardly through an angle of at least 180° may be repeated such that the total angle of rotation is around 360° or 540° or more.
- a fire resistant cable and method of manufacture in accordance with the present invention at least addresses the problems outlined above.
- the advantages of the present invention are that a fire resistant cable is provided that is pliable, quick and easy to install, without the need for specialised tools.
- the metallic tape encasing the inner conductors stays intact, such that the inner conductors are not exposed to fire and water, and which may prevent premature failure of the cable.
- the configuration of the metallic tape ensures that the inner conductors are not exposed to fire and water, and, as such, a standard unitary polymer-based insulation can be used for insulating the inner conductor.
- a fire resistant cable is provided that has a higher mechanical strength and is more durable than conventional soft-skinned fire resistant cables.
- Figure 1 illustrates a cross-section of a prior art fire resistant cable.
- FIG. 2 shows in more detail the prior art method of bonding the metallic tape around the inner conductors.
- Figure 3 illustrates a cross-sectional view of the present invention.
- Figure 4 shows in greater detail how the edges of the metallic tape may be folded and rolled internally to prevent the metallic tape opening in a fire condition.
- Figure 5 illustrates a cross-sectional view of an embodiment whereby the edges of the metallic tape may be folded and rolled only once.
- the fire resistant cable comprises at least one electrical conductor 20, which is insulated against other conductors 20 and the metallic tape 26 using an insulating sheath 24 which may comprise silicon rubber or any suitable polymer-based insulator having a unitary cross section.
- insulating sheath 24 which may comprise silicon rubber or any suitable polymer-based insulator having a unitary cross section.
- annealed copper is utilised for the electrical conductors 20 and for the uninsulated circuit protective conductor 22, which is also bonded to the metallic tape 26.
- the metallic tape 26 may be provided using copper or aluminium or any other suitable metallic foil. Bonded around the metallic tape 26 is a fire resistant protective outer sheath 28, which is a typically a halogen-free low-smoke insulator.
- Figure 4 shows further detail of how the edges of the metallic tape 26 may be folded and rolled to prevent the edges of the metallic tape 26 opening in a fire condition and thus exposing the inner conductors 20, 22.
- each longitudinal edge of the metallic tape 26 is then placed into an overlapped abutting configuration.
- a sealant or other suitable adhesive (not shown) can be used to improve the integrity of the join, although the use of such is not always necessary.
- both edges of the metallic tape 26 are then rolled inwardly through an angle of at least 180° in what may be thought of as a 'crimp' arrangement, and which effectively strengthens the joint.
- the step of rolling the both longitudinal edges of the metallic tape 26 inwardly through an angle of at least 180° is repeated, such that the total angle of rotation of the joint is 360° or 540° or more.
- the metallic tape 26 encasing the inner conductors 20, 22 is much more likely to stay intact during a fire and water condition.
- the final step in the procedure involves bonding the fire resistant protective outer sheath 28 around the metallic tape 26.
- the advantage of such an inwardly facing joint between the longitudinal edges of the metallic tape 26 is that even after prolonged exposure to fire and water, the metallic tape 26 stays intact and thus the inner conductors 20, 22 do not experience the full effects of fire and water, and electrical integrity of the inner conductors 20, 22 is maintained.
- any suitable insulating material may be used for the inner insulating sheath 24.
- the inward nature of the joint also ensures that the outer circumference of the metallic tape 26 is substantially cylindrical in cross-section, so as to increase the overall durability of the cable.
- the inwardly facing nature of the joint also falls neatly in the gap between neighbouring inner conductors 20, 22.
- the inwardly facing joint between the longitudinal edges of the metallic tape 26 also ensures that a very strong mechanical strength cable is provided which is still reasonably pliable, and which can be easily bent into, for example, small radius bends during installation.
- the cable as shown in Figures 3 and 4 is therefore capable of meeting the requirements of BS 5839 Part 1 : 2002 Clause 26.2 for both standard and enhanced fire resistant cables.
- Figure 5 shows an embodiment of the invention whereby the joint between the longitudinal edges of the metallic tape 26 is folded and then rolled only once substantially through 180° to provide an 'interlock' or 'crimp' arrangement, prior to bonding the fire resistant protective outer sheath 28 around the metallic tape 26.
- a fire resistant cable will not have such a high mechanical strength as the cable shown in Figures 3 and 4, although such will more pliable and capable of at least meeting the requirements of BS 5839 Part 1 : 2002 Clause 26.2 for standard fire resistant cables.
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- Insulated Conductors (AREA)
Abstract
A fire resistant cable and method of manufacture suitable for use in critical and emergency signal paths, such as, for example, fire alarm systems or emergency lighting, is provided. A soft-skinned fire resistant cable is provided which capable of meeting the various requirements for standard and to enhanced fire resistant cables that is pliable, quick and easy to install, without the need for specialised tools. The fire resistant cable comprises at least one insulated electrical conductor within a fire resistant protective outer sheath and a metallic tape situated between the insulated electrical conductor and the protective outer sheath. The longitudinal edges of the metallic tape are folded and rolled inwardly to facilitate increased reliability in a fire condition. The configuration of the metallic tape ensures that the inner conductors are not exposed to fire and water, and, as such, a standard unitary polymer-based insulation can be used for insulating the inner conductor. In a fire and water condition, the metallic tape encasing the at least one insulated electrical conductor stays intact, such that the at least one insulated electrical conductor is not exposed to fire and water, and which would otherwise cause failure of the cable.
Description
FIRE RESISTANT CABLE AND METHOD OF MANUFACTURE
This invention relates to a fire resistant cable and method of manufacture. In particular, this invention relates to a fire resistant cable suitable for use in critical and emergency signal paths, such as, for example, fire alarm systems or emergency lighting, and which provides sufficient resistance to the effects of fire and water.
Recently, the development of 'soft-skinned' fire resistant cables, which use various grades of polymer-based insulation inside a thin metallic or microglass sheath have become a viable alternative to more traditional 'fire survival' cables, such as MICC (Mineral Insulated Copper Coated) cables. iyilCC cables are well known in the prior art and consist of copper conductors within a copper external sheath and the void inside the sheath is filled with a mineral insulation of magnesium oxide. This type of cable is virtually indestructible with a high mechanical strength. Although MICC cables are of a high quality and robust, they are much more difficult to install than their soft-skinned counterparts. The other main disadvantage is that MICC cable is very inflexible due to its very high mechanical strength.
Whilst soft-skinned fire resistant cables cannot match MICC cables in terms of sustained fireproof performance, significant developments have been "made.ϊn recent' years "so -.that such are capable of meeting the requirements of BS 5839 Part 1 : 2002, Clause 26.2 for standard fire resisting cables; EN 50200' PH- "30; BS 6387 Categories C, W and Z: 1994; BS 7629 Part 1 : 1997; and BS ,843.4 Part 1 : 2003. BS 5839 Part 1 : 2002, Clause 26.2 has recently been further revised to define a more stringent standard for use in critical signal paths, and termed enhanced fire resisting cables. Enhanced cables must be used in unsprinklered buildings (i) greater than 30m in height,
or (ii) with four or more evacuation zones, or (iii) for example, hospitals or other buildings, where there are horizontal evacuation arrangements, or (iv) where a risk assessment identifies a possible need.
The cross section of a prior art soft-skinned fire resistant cable is shown in Figure 1 and comprises typically of annealed copper conductors 10 each within an insulating sheath 14, which generally comprises a microglass tape inner (not shown) and silicon rubber outer (not shown). Typically, an uninsulated circuit protective conductor 12 is also provided. A thin metallic tape or foil 16, which is usually copper, is then rolled around such inner conductors 10, 12, which is then enclosed within a halogen-free fire resistant protective outer sheath 18.
As shown in Figure 2, the current method for covering the inner conductors 10, 12 with the metallic tape 16 is to roll the metallic tape 16 around the inner conductors 10, 12 and a small overlap of around 1mm is bonded to itself and to the protective outer sheath 18. However, the problem associated with this approach is that such design often allows the metallic tape 16 to come apart and bare the inner conductors 10, 12 during a fire condition. The fact that such cables are able to meet the requirements of the relevant standards lies in the use of the two-part insulating sheath 14 having a microglass tape inner and silicon rubber outer. In particular, if the metallic tape 16 comes apart for the reasons described above, the integrity of the inner circuit conductors 10 is only maintained by the inner microglass tape wound around each inner conductor 10. Disadvantageously, the use of such a two-part insulating sheath 14 lies in the cost and manufacture of the cable.
Previous examples of electrical cabling arrangements for use in chemically corrosive environments have been proposed and utilise a metallic sheath which encloses the inner conductors; the edges of the metallic sheath being externally folded and sealed with a sealant for maintaining the moisture and gas integrity of the cable, as disclosed in US 5,451 ,718. For the reasons
described above, the power cable disclosed in US 5,451 ,718 would not be able to meet the relevant standards for fire resistant cables.
It is the object of the present invention to provide a fire resistant cable that is pliable, quick and easy to install, without the need for specialised tools.
In a fire condition, the metallic tape encasing the inner conductors stays intact, such that the inner conductors are not exposed to fire and water, and which may prevent premature failure of the cable. The configuration of the metallic tape ensures that the inner conductors are not exposed to fire and water, and, as such, a standard unitary polymer-based insulation can be used for insulating the inner conductor. It is a further object of the present invention to provide a fire resistant cable that has a higher mechanical strength and is more durable than conventional soft-skinned fire resistant cables.
According to the present invention there is provided a fire resistant cable, comprising: at least one insulated electrical conductor contained within a fire resistant protective outer sheath; and a metallic tape situated between said at least one insulated electrical conductor and said protective outer sheath, said metallic tape being folded and rolled inwardly at its edge to facilitate increased reliability in a fire condition.
In a preferred embodiment, said at least one insulated electrical conductor comprises an annealed copper conductor having an insulating sheath. Preferably, said insulating sheath comprises a polymer-based insulator having a unitary cross section. Further, preferably, said insulating sheath comprises silicon rubber. In use, a circuit protective conductor is also provided which is uninsulated, and is in direct contact with said metallic tape.
Preferably, in use, said metallic tape may be formed from copper or aluminium or any other suitable metallic foil. Said metallic tape completely
encompasses said at least one insulated electrical conductor and may be double-folded or triple-folded at is edge against itself to prevent the metallic tape opening in a fire condition.
Further preferably, said fire resistant protective outer sheath may be provided using any suitable halogen-free protective sheath.
Also according to the present invention there is provided a method of manufacturing a fire resistant cable comprising at least one insulated electrical conductor, comprising the steps of: rolling a metallic tape having first and second longitudinal edges around said at least one insulated electrical conductor into an overlapped abutting configuration; folding said first and second longitudinal edges of said metallic tape back on itself to secure said at least one insulated electrical conductor; rolling said first and second longitudinal edges of said metallic tape inwardly through an angle of at least 180°; and bonding a fire resistant protective outer sheath around said metallic tape.
Preferably, the step of rolling said first and second longitudinal edges of said metallic tape inwardly through an angle of at least 180° may be repeated such that the total angle of rotation is around 360° or 540° or more.
It is believed that a fire resistant cable and method of manufacture in accordance with the present invention at least addresses the problems outlined above. In particular, the advantages of the present invention are that a fire resistant cable is provided that is pliable, quick and easy to install, without the need for specialised tools. Advantageously, in a fire condition, the metallic tape encasing the inner conductors stays intact, such that the inner conductors are not exposed to fire and water, and which may prevent premature failure of the cable. The configuration of the metallic tape ensures that the inner conductors are not exposed to fire and water, and, as such, a
standard unitary polymer-based insulation can be used for insulating the inner conductor. It is a further advantage of the present invention that a fire resistant cable is provided that has a higher mechanical strength and is more durable than conventional soft-skinned fire resistant cables.
It will be obvious to those skilled in the art that variations of the present invention are possible and it is intended that the present invention may be used other than as specifically described herein.
A specific and non-limiting embodiment of the invention will be described by way of example and with reference to the accompanying drawings, in which: -
Figure 1 illustrates a cross-section of a prior art fire resistant cable.
Figure 2 shows in more detail the prior art method of bonding the metallic tape around the inner conductors.
Figure 3 illustrates a cross-sectional view of the present invention.
Figure 4 shows in greater detail how the edges of the metallic tape may be folded and rolled internally to prevent the metallic tape opening in a fire condition.
Figure 5 illustrates a cross-sectional view of an embodiment whereby the edges of the metallic tape may be folded and rolled only once.
Referring now to the drawings, the implementation of the present invention is illustrated in Figures 3 and 4. In use, the fire resistant cable comprises at least one electrical conductor 20, which is insulated against other conductors 20 and the metallic tape 26 using an insulating sheath 24 which may comprise silicon rubber or any suitable polymer-based insulator
having a unitary cross section. Typically, annealed copper is utilised for the electrical conductors 20 and for the uninsulated circuit protective conductor 22, which is also bonded to the metallic tape 26.
The metallic tape 26 may be provided using copper or aluminium or any other suitable metallic foil. Bonded around the metallic tape 26 is a fire resistant protective outer sheath 28, which is a typically a halogen-free low-smoke insulator.
Figure 4 shows further detail of how the edges of the metallic tape 26 may be folded and rolled to prevent the edges of the metallic tape 26 opening in a fire condition and thus exposing the inner conductors 20, 22. In particular, when the metallic tape 26 is rolled around the inner conductors 20, 22, each longitudinal edge of the metallic tape 26 is then placed into an overlapped abutting configuration. A sealant or other suitable adhesive (not shown) can be used to improve the integrity of the join, although the use of such is not always necessary. From this overlapped abutting configuration, both edges of the metallic tape 26 are then rolled inwardly through an angle of at least 180° in what may be thought of as a 'crimp' arrangement, and which effectively strengthens the joint. In the preferred embodiment shown in Figures 3 and 4, the step of rolling the both longitudinal edges of the metallic tape 26 inwardly through an angle of at least 180° is repeated, such that the total angle of rotation of the joint is 360° or 540° or more. In this manner, the metallic tape 26 encasing the inner conductors 20, 22 is much more likely to stay intact during a fire and water condition. The final step in the procedure involves bonding the fire resistant protective outer sheath 28 around the metallic tape 26.
The advantage of such an inwardly facing joint between the longitudinal edges of the metallic tape 26 is that even after prolonged exposure to fire and water, the metallic tape 26 stays intact and thus the inner conductors 20, 22 do not experience the full effects of fire and water, and electrical integrity of
the inner conductors 20, 22 is maintained. In this way, any suitable insulating material may be used for the inner insulating sheath 24. The inward nature of the joint also ensures that the outer circumference of the metallic tape 26 is substantially cylindrical in cross-section, so as to increase the overall durability of the cable. The inwardly facing nature of the joint also falls neatly in the gap between neighbouring inner conductors 20, 22.
The inwardly facing joint between the longitudinal edges of the metallic tape 26 also ensures that a very strong mechanical strength cable is provided which is still reasonably pliable, and which can be easily bent into, for example, small radius bends during installation. The cable as shown in Figures 3 and 4 is therefore capable of meeting the requirements of BS 5839 Part 1 : 2002 Clause 26.2 for both standard and enhanced fire resistant cables.
Figure 5 shows an embodiment of the invention whereby the joint between the longitudinal edges of the metallic tape 26 is folded and then rolled only once substantially through 180° to provide an 'interlock' or 'crimp' arrangement, prior to bonding the fire resistant protective outer sheath 28 around the metallic tape 26. Such a fire resistant cable will not have such a high mechanical strength as the cable shown in Figures 3 and 4, although such will more pliable and capable of at least meeting the requirements of BS 5839 Part 1 : 2002 Clause 26.2 for standard fire resistant cables.
Various alterations and modifications may be made to the present invention without departing from the scope of the invention. For example, although particular embodiments refer to a fire resistant cable for use in critical and emergency signal paths, this is in no way intended to be limiting as, in use, the present invention may be implemented in a variety of applications where a certain level of fire resistance and/or mechanical integrity is desired, such as electrical power systems or telecommunications, etc. The manner in which the metallic tape 26 is folded may also have further
application in neighbouring technical fields. Although the present application refers to various British Standards, these are for illustrative purposes only, as, in use, differing standards for the fire resistance of cables are specified in other countries.
Claims
1. A fire resistant cable, comprising: at least one insulated electrical conductor contained within a fire resistant protective outer sheath; and a metallic tape situated between said at least one insulated electrical conductor and said protective outer sheath, said metallic tape being folded and rolled inwardly at its edge to facilitate increased reliability in a fire condition.
2. A fire resistant cable according to claim 1 , wherein said at least one insulated electrical conductor comprises an annealed copper conductor having an insulating sheath.
3. A fire resistant cable according to claim 2, wherein said insulating sheath comprises a polymer-based insulator having a unitary cross section.
4. A fire resistant cable according to claims 2 or 3, wherein said insulating sheath comprises silicon rubber.
5. A fire resistant cable as claimed in any preceding claim, further comprising an uninsulated circuit protective conductor in direct contact with, and contained within, said metallic tape.
6. A fire resistant cable as claimed in claim 1 , wherein said metallic tape is formed from copper or aluminium or any other suitable metallic foil.
7. A fire resistant cable as claimed in any preceding claim, wherein said metallic tape completely encompasses said at least one insulated electrical conductor.
8. A fire resistant cable as claimed in any preceding claim, wherein said metallic tape is double-folded or triple-folded at its edge against itself to prevent the metallic tape opening in a fire condition.
9. A fire resistant cable as claimed in any preceding claim, wherein said fire resistant protective outer sheath is provided using any suitable halogen-free protective sheath.
10. A fire resistant cable as claimed in any preceding claim, further comprising a sealant or other suitable adhesive placed along the edges of said metallic tape.
11. A method of manufacturing a fire resistant cable comprising at least one insulated electrical conductor, comprising the steps of: rolling a metallic tape having first and second longitudinal edges around said at least one insulated electrical conductor into an overlapped abutting configuration; folding said first and second longitudinal edges of said metallic tape back on itself to secure said at least one insulated electrical conductor; rolling said first and second longitudinal edges of said metallic tape inwardly through an angle of at least 180°; and bonding a fire resistant protective outer sheath around said metallic tape.
12. A method as claimed in claim 11 , wherein said at least one insulated electrical conductor comprises an annealed copper conductor having an insulating sheath.
13. A fire resistant cable according to claim 12, wherein said insulating sheath comprises a polymer-based insulator having a unitary cross section.
14. A fire resistant cable according to claims 12 or 13, wherein said insulating sheath comprises silicon rubber.
15. A method as claimed in any preceding claim, wherein said fire resistant cable further comprises an uninsulated circuit protective conductor in direct contact with, and contained within, said metallic tape.
16. A method as claimed in claim 11 , wherein said metallic tape is formed from copper or aluminium or any other suitable metallic foil.
17. A method as claimed in any preceding claim, wherein the step of rolling said first and second longitudinal edges of said metallic tape inwardly through an angle of at least 180° is repeated such that the total angle of rotation is around 360° or 540° or more.
18. A method as claimed in claim 11 , wherein said fire resistant protective outer sheath is provided using any suitable halogen-free protective sheath.
19. A method as claimed in any preceding claim, further comprising the step of adhering said first and second longitudinal edges of said metallic together using a sealant of other suitable adhesive.
20. A fire resistant cable as described herein with reference to Figures 3 to 5 of the accompanying drawings.
21. A method of manufacturing a fire resistant cable as hereinbefore described.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0418731.6A GB0418731D0 (en) | 2004-08-21 | 2004-08-21 | Fire resistant cable and method of manufacture |
| GB0418731.6 | 2004-08-21 | ||
| GB0501900.5 | 2005-01-31 | ||
| GB0501900A GB2417362B (en) | 2004-08-21 | 2005-01-31 | Fire resistant cable and method of manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006021757A1 true WO2006021757A1 (en) | 2006-03-02 |
Family
ID=35355843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB2005/003249 WO2006021757A1 (en) | 2004-08-21 | 2005-08-19 | Fire resistant cable and method of manufacture |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2006021757A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928191A (en) * | 2014-04-16 | 2014-07-16 | 隆扬电子（昆山）有限公司 | Production technology of conductive fabric sleeve |
| WO2015067323A1 (en) * | 2013-11-11 | 2015-05-14 | Prysmian S.P.A. | Process of manufacturing power cables and related power cable |
| CN104916353A (en) * | 2015-05-22 | 2015-09-16 | 上海亨公电线电缆有限公司 | Ceramic silicon rubber insulated cable capable of resisting high temperature of 1000 DEG C |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB828177A (en) * | 1957-08-20 | 1960-02-17 | Standard Telephones Cables Ltd | Aluminium sheathed electric cables |
| US3073889A (en) * | 1958-08-15 | 1963-01-15 | Int Standard Electric Corp | Electric submarine cables |
| GB1504056A (en) * | 1974-07-09 | 1978-03-15 | Thomson Brandt | Flame resisting cables |
| GB2130785A (en) * | 1982-10-01 | 1984-06-06 | Delta Enfield Ltd | Fire-resistant electrical cable |
| US5451718A (en) * | 1993-04-08 | 1995-09-19 | Southwire Company | Mechanically bonded metal sheath for power cable |
| US20030031818A1 (en) * | 1999-02-03 | 2003-02-13 | Heinrich Horacek | Halogen-free intumescent sheath for wires and optical cables |
| US20040050578A1 (en) * | 1999-12-24 | 2004-03-18 | Plastic Insulated Cables Limited | Communications cable |
-
2005
- 2005-08-19 WO PCT/GB2005/003249 patent/WO2006021757A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB828177A (en) * | 1957-08-20 | 1960-02-17 | Standard Telephones Cables Ltd | Aluminium sheathed electric cables |
| US3073889A (en) * | 1958-08-15 | 1963-01-15 | Int Standard Electric Corp | Electric submarine cables |
| GB1504056A (en) * | 1974-07-09 | 1978-03-15 | Thomson Brandt | Flame resisting cables |
| GB2130785A (en) * | 1982-10-01 | 1984-06-06 | Delta Enfield Ltd | Fire-resistant electrical cable |
| US5451718A (en) * | 1993-04-08 | 1995-09-19 | Southwire Company | Mechanically bonded metal sheath for power cable |
| US20030031818A1 (en) * | 1999-02-03 | 2003-02-13 | Heinrich Horacek | Halogen-free intumescent sheath for wires and optical cables |
| US20040050578A1 (en) * | 1999-12-24 | 2004-03-18 | Plastic Insulated Cables Limited | Communications cable |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015067323A1 (en) * | 2013-11-11 | 2015-05-14 | Prysmian S.P.A. | Process of manufacturing power cables and related power cable |
| US9892824B2 (en) | 2013-11-11 | 2018-02-13 | Prysmian S.P.A. | Method of manufacturing power cables |
| AU2013404756B2 (en) * | 2013-11-11 | 2018-09-20 | Prysmian S.P.A. | Process of manufacturing power cables and related power cable |
| CN103928191A (en) * | 2014-04-16 | 2014-07-16 | 隆扬电子（昆山）有限公司 | Production technology of conductive fabric sleeve |
| CN104916353A (en) * | 2015-05-22 | 2015-09-16 | 上海亨公电线电缆有限公司 | Ceramic silicon rubber insulated cable capable of resisting high temperature of 1000 DEG C |
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