WO2003061072A2 - Connector for connecting conduits carrying cables at a location where the cables cross each other - Google Patents
Connector for connecting conduits carrying cables at a location where the cables cross each other Download PDFInfo
- Publication number
- WO2003061072A2 WO2003061072A2 PCT/SG2003/000002 SG0300002W WO03061072A2 WO 2003061072 A2 WO2003061072 A2 WO 2003061072A2 SG 0300002 W SG0300002 W SG 0300002W WO 03061072 A2 WO03061072 A2 WO 03061072A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- connector
- cross
- cable
- conduit
- over portion
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/504—Bases; Cases composed of different pieces different pieces being moulded, cemented, welded, e.g. ultrasonic, or swaged together
- H01R13/5045—Bases; Cases composed of different pieces different pieces being moulded, cemented, welded, e.g. ultrasonic, or swaged together different pieces being assembled by press-fit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/36—Installations of cables or lines in walls, floors or ceilings
- H02G3/38—Installations of cables or lines in walls, floors or ceilings the cables or lines being installed in preestablished conduits or ducts
- H02G3/383—Installations of cables or lines in walls, floors or ceilings the cables or lines being installed in preestablished conduits or ducts in floors
Definitions
- the present invention relates to a connector for carrying a cable such as an electrical cable, at a location where the cable is crossed by another cable.
- conduits for electrical and telephone cables In the construction industry, it is known for conduits for electrical and telephone cables to be laid and then subsequently embedded within a concrete floor. This technique is most frequently employed in high density multi-storey construction.
- each floor is partially formed from pre-cast slabs which are placed in position. Conduit which is to carry the electrical and telephone cables is then laid. The cables are covered with a wire reinforcing mesh and an overlayer of cement is poured which covers the conduits and the wire mesh in order to complete formation of the floor.
- the cement overlayer will need to be thick enough to cover the conduits and wire mesh.
- the thickness of the floor will depend on the thickness of the conduits. As conduits will usually need to cross other conduits at several locations, the floor overlayer will need to be thick enough to cover not just one, but a pair of conduits.
- the invention provides a connector for carrying a cable at a location where said cable is intended to be crossed by another electrical cable, said connector having: a first connecting portion adapted to be connected to a first section of conduit for carrying said cable; a second connecting portion adapted to be connected to a second section of conduit for carrying said cable; and a cross-over portion intermediate said first and second connecting portions, said cross-over portion being shaped so as to be flatter relative to said sections of conduit at the location where said cable is intended to be crossed by said another cable while having an internal cross-sectional area sufficient to prevent said cable from overheating .
- conduit crossing the connector will provide a reduced profile compared to the profile of two conduits crossing one another.
- said cross-over portion has an internal cross-sectional area substantially the same as the internal cross-sectional area of said sections of conduit.
- each connecting portion has a socket for receiving a section of conduit to thereby connect said connector to said section of conduit.
- the external cross -section of said cross-over portion is shaped so as to be complementary to the external cross-section of the cross-over portion of another connector carrying said another cable.
- said connector is further adapted to carry cables in two directions which cross each other, wherein said first and second connecting portions corresponding to a first directions and said connector has third and fourth connecting portions corresponding to said second direction and, wherein said cross-over portion has two layers, each said layer corresponding to a respective one of said directions .
- said connector is adapted to carry a plurality of cables in each direction, said connector having a plurality of pairs of first and second connecting portions, each pair adapted to carry a cable.
- Figure 1 shows a floor structure of the prior art
- Figure 2 is a perspective view of a connector of a first embodiment of the invention
- Figure 3 is a side view of half of the connector
- Figure 4 shows two connectors of the first embodiment crossing
- Figure 5 is an exploded view showing a connector of a second embodiment
- Figure 6 is a perspective view showing the two halves of the connector of the first embodiment
- Figure 7 shows a wiring arrangement employing the connectors of the first and second embodiments
- Figure 8 shows a variation of the connector of the second preferred embodiment
- Figure 9 is a partial top sectional view of one half of the connector of the first embodiment
- Figure 10 is an exaggerated partial sectional view of the connector of the second embodiment which illustrates the water proofing of the lid.
- Figure 11 is a cross-section through the connector of the second embodiment.
- Figure 1 shows the floor structure 101 employed in the prior art.
- a pre-cast slab 103 is first placed in position.
- the pre-cast slab 103 has a thickness of approximately 70mm as indicated by arrows 111.
- conduit 105 for carrying cable is then laid on top of the pre-cast slab 103.
- further conduit 105b must cross the first conduit 105a.
- such conduit is typically 20mm in diameter.
- Mesh 107 is placed on top of the conduit 105.
- the overlayer of concrete 109 must have a thickness which is sufficient to embed both conduits 105a, 105b and the layer of mesh 107. Further, this thickness must be the same for the entire floor if the floor is to be even. In the prior art, such a layer is typically about 80mm thick as indicated by arrows 113. This means that the total floor thickness is about 150mm.
- any reduction in the thickness 113 of the overlayer 109 of concrete will lead to savings in the cost of construction. If the thickness of the overlayer to be poured in situ were to be reduced by 15mm, this would result in a 20% saving in concrete for the overlayer 109 and also lead to a fast drying time and hence faster construction times. The reduced weight of the floor will also reduce the burden on columns and load bearing walls.
- the first preferred embodiment provides a connector 1 which is designed to be flatter, and hence to have a lower profile at the crossing point, while still allowing for effective heat dispersion from the cable.
- connector 1 has a pair of connecting portions 5a, 5b which each have a socket 11 which is adapted to receive a section of conduit, whereby the connector can join two sections of conduit and carry the cable carried by the sections of conduit.
- the connector 1 is formed from first and second halves 3a, 3b which are snap- fitted together to form connector 1.
- Connecting portion 5 are generally circular in external cross section and a cross-over portion 7 located between the connection portion 5 is generally trapezoidal in external cross section. As is shown best by Figure 3, the cross-over portion, is flatter than the connecting portions 5a, 5b and the conduit which the connecting portions are adapted to receive.
- the sockets 11 are sized such that the ends of sections of conduit 15 will press fit into them and be held in place.
- the sockets have a step 10, which is designed to have the same dimensions as the wall of the conduit 15 so that the inner surface of the conduit 33 is contiguous with the inner surface of the connector 34 to allow for smooth passage of the cable when it is fed past the transition from conduit to connector. Also the inner surface of the connector 34 is curved to make it easier to feed cable 8 through connector 1.
- Figure 3 illustrates that the passage 13 through the connector, narrows in the vertical plane at the crossover portion but widens in the horizontal plane as shown in Figure 9.
- the shape of the passage 13 varies as it passes through the connector, it has a substantially uniform cross-sectional area.
- the cross-sectional area of the passage is substantially the same as the internal cross- sectional area of the conduit throughout.
- Figure 4 illustrates how a pair of connectors 1 may be used to form a cross joint which is thinner than a pair of conduits.
- Each connector 1 is attached to first and second sections of conduit 15a, 15b and the connectors are placed with one upside down relative to the other so that the external surface of the cross-over portions abut one another.
- the combined thickness of the two connectors indicated by arrow 17 is only marginally greater than the thickness of the conduit.
- the combined thickness of two connectors is 25mm - a substantial reduction from the combined thickness of two 20mm ducts.
- each cross-over portion is about 62.5% of the thickness of each conduit. It is preferred that the cross-over portion be approximately 60-80% as thick as the conduit.
- Figure 6 illustrates in further detail how two halves 3a may be brought together to form a connector.
- Each half has a peg 12 at one end and a hole 14 at the other so that the pegs may be inserted into the holes of the respective halves in order to snap fit the halves of the connector together.
- the two parts 3a, 3b also include a pair of catches 51 and recesses 53 to firmly connect the two parts together.
- the connector 1 illustrated in Figure 6 includes a step 10, although it need not include a step 10. Connectors without steps are acceptable variations on the preferred embodiments illustrated.
- Figure 5 shows a connector of the second preferred embodiment.
- the connector 21 is adapted to carry cables in two directions which cross each other.
- the connector is in the form of a junction box 21 having a base 23 with twelve connecting portions 25 - six for each direction - so that three conduits for carrying electrical cable may be connected in each direction.
- the base 23 is divided into three sections 27 by central ribs 29 which have curved ends, and straight side ribs 30.
- the ribs not only keep electrical cables separate but also guide the electrical cable through connecting portions 25 when cable is being fed through the junction box 21.
- the ribs 29, 30 act as guides to make it easier for a damaged cable to be replaced.
- FIG. 12 shows how the curved guiding portions 32, 35 guide cable 8 through the aperture 38 which connects the connecting portions 25 to the lower layer of the junction box.
- the ribs 29, 30 also support the separator plate 31 which divides the cross-over portion into two layers. Cables corresponding to a first direction are carried by a first (lower) layer and cables corresponding to a second direction are carried by a second (upper) layer.
- the plate 31 is also divided into a number of sections 27, one for each conduit, and also has ribs 29, 30 which like the ribs 29, 30 in the base act as guide means, as well as acting as a partial support for lid 33.
- the lid 33 also rests on the outer walls of the base portion 21 of the junction box and is secured to the base 21 by threaded screws 45 and nails 46.
- the support provided by the ribs 29, 30 assists in preventing the junction box 21 from being damaged by the weight of concrete poured on top of it.
- Figure 10 shows the waterproofing features of the junction box 21. It will be appreciated that before the overlayer of concrete has dried it will be possible for moisture to penetrate the join 40 between the lid 33 and base 21. There is also a possibility of moisture penetration in the region of screw recess 41. To this end steps 42 and 44 are provided to prevent moisture entering the interior of the box.
- Figure 7 shows how a number of connectors 1 and junction boxes 21 may be used to form a wiring layout.
- Figure 8 illustrates an 8-cable junction box capable of carrying four cables in separate directions.
- Figure 8 also illustrates an embodiment in which no curved guiding portions are provided which results in an alternative configuration of ribs 29. Another possible variation is for all the ribs 29 to be carried by the plate.
- the connectors of the invention can be chosen depending on the dimensions of the conduit to be connected. Suitable dimensions of the conduit will depend, for example, on the type of cable 5 being carried. If an electrical cable consisting of three wires: live, neutral and earth is to be carried, each wire would typically have a cross-sectional area of 2.5mm 2 and an outside diameter of around 3.4mm. When the wires are bundled together, the effective height will be around 10 6.34mm. To prevent localised overheating of the wires, the height of the cross over portion should be at least 1.5 times the combined height of the three wires - e.g. approximately 9.5mm in height. This determines the minimum height of the cross-over portion 7.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003235611A AU2003235611A1 (en) | 2002-01-07 | 2003-01-07 | Connector for connecting conduits carrying cables at a location where the cables cross each other |
KR10-2004-7010638A KR20050002813A (en) | 2002-01-07 | 2003-01-07 | Connector for connecting conduits carrying cables at a location where the cables cross each other |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPR9863 | 2002-01-07 | ||
AUPR9863A AUPR986302A0 (en) | 2002-01-07 | 2002-01-07 | A connector |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003061072A2 true WO2003061072A2 (en) | 2003-07-24 |
WO2003061072A3 WO2003061072A3 (en) | 2004-03-25 |
Family
ID=3833475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SG2003/000002 WO2003061072A2 (en) | 2002-01-07 | 2003-01-07 | Connector for connecting conduits carrying cables at a location where the cables cross each other |
Country Status (5)
Country | Link |
---|---|
KR (1) | KR20050002813A (en) |
CN (1) | CN1639936A (en) |
AU (1) | AUPR986302A0 (en) |
TW (1) | TWI256446B (en) |
WO (1) | WO2003061072A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11013668B2 (en) | 2016-08-18 | 2021-05-25 | Tokuyama Dental Corporation | Two-package dental adhesive composition |
WO2022089902A1 (en) * | 2020-10-26 | 2022-05-05 | Sew-Eurodrive Gmbh & Co. Kg | System for transmitting electrical energy |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100734026B1 (en) * | 2005-12-01 | 2007-06-29 | 가온전선 주식회사 | Distribution Apparatus for Electric Wiring |
CN103515866A (en) * | 2013-09-30 | 2014-01-15 | 无锡市神力通信工程有限公司 | Cross connector for laying cables |
CN109462200A (en) * | 2018-11-26 | 2019-03-12 | 浙江省三建建设集团有限公司 | A kind of pre-buried electric conduit overlapping connector |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2193851A (en) * | 1986-08-14 | 1988-02-17 | Ackermann Electrical Syst | Cable trunking |
WO1988003207A1 (en) * | 1986-10-22 | 1988-05-05 | Michael David Boyd | Modular hollow floor panels with integral ducting |
GB2230653A (en) * | 1989-03-14 | 1990-10-24 | Baker & Stickland | Trunking for use in a raised floor |
US5171159A (en) * | 1990-08-22 | 1992-12-15 | Byrne Norman R | Electrical interconnection assembly |
-
2002
- 2002-01-07 AU AUPR9863A patent/AUPR986302A0/en not_active Abandoned
-
2003
- 2003-01-07 TW TW092100262A patent/TWI256446B/en not_active IP Right Cessation
- 2003-01-07 KR KR10-2004-7010638A patent/KR20050002813A/en not_active Application Discontinuation
- 2003-01-07 CN CNA038049449A patent/CN1639936A/en active Pending
- 2003-01-07 WO PCT/SG2003/000002 patent/WO2003061072A2/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2193851A (en) * | 1986-08-14 | 1988-02-17 | Ackermann Electrical Syst | Cable trunking |
WO1988003207A1 (en) * | 1986-10-22 | 1988-05-05 | Michael David Boyd | Modular hollow floor panels with integral ducting |
GB2230653A (en) * | 1989-03-14 | 1990-10-24 | Baker & Stickland | Trunking for use in a raised floor |
US5171159A (en) * | 1990-08-22 | 1992-12-15 | Byrne Norman R | Electrical interconnection assembly |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11013668B2 (en) | 2016-08-18 | 2021-05-25 | Tokuyama Dental Corporation | Two-package dental adhesive composition |
WO2022089902A1 (en) * | 2020-10-26 | 2022-05-05 | Sew-Eurodrive Gmbh & Co. Kg | System for transmitting electrical energy |
Also Published As
Publication number | Publication date |
---|---|
WO2003061072A3 (en) | 2004-03-25 |
KR20050002813A (en) | 2005-01-10 |
CN1639936A (en) | 2005-07-13 |
TWI256446B (en) | 2006-06-11 |
AUPR986302A0 (en) | 2002-01-31 |
TW200306388A (en) | 2003-11-16 |
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