Different types of cable jointing methods in electrical. High voltage cable joints heatshrinkable joints ehvsh 46 one piece joints ehvss 48 three piece joints ehvst 51 fibreoptic addon kit for hv cable joints 54 iv. Earth conductor shall be laid parallel along with cables. May 14, 2014 11kv heat shrink cable joints are ideal for direct burial, overhead and vertical cable jointing of 3 core cables. The idea of having conducting or semiconducting parts in the joint was tested based on some earlier designs of high voltage cables 4. Cable joints should be completely waterproofed using an appropriate cable jointing compound. Different types of cable jointing methods in electrical networks. Mediumhigh voltage cable preparation it is necessary to begin with a good cable end. Jointing methods 5 jointing methods eagles plumbing shop. Cable failures cables damaged after installation a tap into an existing cable tee or wye splices. Geometrical, where the contour of conducting elements is controlling the electrical field at the end of a high voltage cable. Mseal kastex joints and terminations for lv cables are based on a cast resin system.
Cables shall be dressed properly,secure cables to cable tray using cleats where the cable is fixed to a vertical cable tray or ties where the cable tray surface is horizontal without any overlapping and it will be ensured that the cable distance is maintained as per approved shop drawing. Cable jointing and termination pracuces are hrrctly described for general guidance. Cold shrink was invented by 3m over 40 years ago to avoid the need for a heat source or naked flames in hazardous areas. For this reason, it is common practice to cut off a portion of cable after pulling to assure an undamaged end. Turn the pages to discover cable splicing and termination techniques that can help reduce the risk of errors that could cause premature electrical failures and. Choose crews based on the length of the pull, total degrees of bend, tail loading force required to pull cable off feed reel, use of lubricant, and use of power.
These are needed when one makes repairs to pieces of damaged cable sections or when one wants to lengthen the existing cable for use. Hv cables general construction methodology pe424f7001r00001001. Western power distribution cable jointing familiarisation. Plumbers metal it has 30% tin and 70% lead is used for plumbing joints in. Sep 07, 2018 wires form the foundation of a circuit and joining them together is an essential part of making a circuit work. Types of electrical joints and terminations back to basics. This is a straight joint used for small solid cables. These features allow the installation of the jointing system in ducts, vaults and directburial applications.
D, in electrical submersible pumps manual second edition, 2018. Jointingtermination process of different type of cable. Tin mans solder it has 60% tin and 40% lead has a low melting point due to high amount of tin commonly used in electrical joints i. Apprentice cable jointer powerline certificate iii esi cable jointing background the cable jointing apprenticeship will be conducted over a fouryear period. The quality of a joint or termination depends to a large extent on the skill of cable jointer. A good rule of thumb to cover all these additional cable lengths is to allow 1 percent extra for outside plant outdoor cable runs and 5 to 7 percent extra for inside cable runs. Jointing is a craft that requires solid experience, both for extruded and mass impregnated mi cables.
You are required to haveprovide western power approved ppc and. The benefits of the universal joint for the repair and installation of subsea fibre optic cable systems are widely acknowledged within the telecommunication industry. The new design of resin cable joints from 3m electrical features safer mould bodies and scotchcast resin delivery system. High voltage connectors high voltage connectors for outdoor terminations 58 high voltage cable terminations high voltage dry plugin terminations high voltage cable joints. The purpose of this report is to inform the reader of the typical methods for installing an underground cable along public roads. For the stress control, basically the following methods are known. Cable supports should be corrosion resistant and located so that the cable insulation does not become abraded due to cable movement from wind or water forces. Whether youre working underground, on overhead lines, in low or high voltage applications or anywhere else, our cable jointing training courses are the perfect entrylevel step. Cable routes should also avoid areas of likely damage from physical operations on the structure. Method statement for installation of high voltage hv. Method statement for optical fiber cable installation project. Wrap the end of one of the wires around the straight portion of the other wire, and then do the same for the other wire. Method for jointing cables international standard electric. Cable joints should be completely waterproofed using an appropriate cablejointing compound.
The design of cable jointing and termination accessories is based on this perception. A premoulded cable joint consists normally of one elastomeric body, where all the stress control elements are integrated see picture 1. A study of a mv cable joint 5 conducting materials, was found to produce an extremely high total field at certain points and thus obstruct the quality of the joint. Cable soldering methods 28 solder there are two types of solder used in electrical work fine soldertin mans solder plumbers metal i. These include three main types of wire splices, soldering and other devices, such as wire nuts, screw terminals and crimp connectors. Also, for clarity and easy flow of discussion, the word cable splicing and termination will occasionally be replaced with cable works. Relicon cable joints are suitable for universal application as branch or straight through joints in lowvoltage electrical installations. It should be noted that where the word accessories are used refers to cable splicing and termination materials. They are the cable jointing product of choice of energy supply companies, industry and the electrical trade for permanently connecting cables buried in the ground. The basic principles of cable jointing and terminations construction of electrical power cables, different types of cables for various voltage ratings and manufacturing aspects different types of connectors and connection methods different methods of cable terminations and jointing and choosing an appropriate type for every. Another common method is heat shrinkable stress control tubing that is used to control high electrical stresses at insulation screen terminating point in medium voltage plastic and paper insulated cable joints and terminations up to 36 kv.
In circumstances where there is a need for technology that does not require the need for the use of heat, torches or adhesives, 3m cold shrink joints. Ward operations has a strong working relationship with companies like anglo american, bma, rio tinto, pacific aluminium, ergon energy, xstrata coal and curragh queensland mining, just to name a few. Power cable accessories under the wellestablished brand name raychem, raychem rpg offers a comprehensive range of cable accessories for almost all cable types. Cable ship or landing station is in charge for fiber testing after the joint box is. Power cables simply the best for locating the next task is to locate the position of the underground cable it is useful to consider the merits of the individual techniques. In most of the electrical distribution networks one finds extensive use of cable jointing kits. Wires form the foundation of a circuit and joining them together is an essential part of making a circuit work. Cable jointing tools mv hv jointers tools, high voltage.
The main test methods used are as mentioned previously. The basic principles of cable jointing and terminations construction of electrical power cables, different types of cables for various voltage ratings and manufacturing aspects different types of connectors and connection methods different. Mv cable accessories installation best practice pdf ensto. Work or testing on hv cable systems including cables subject to induced voltage opsaf5. Sep 08, 2014 the quality of a joint or termination depends to a large extent on the skill of cable jointer.
The supplied length of cable is not sufficient to perform the intended job, e. Managing safety hazards in electric cable splicing and. Cable jointing solutions ltd cable joints products. Jointing of power cables should be as simple as twisting and taping the wire. Whether youre working with high or low voltage cables, electrical training course is the best place to get the training you need to work safely and expand your skillset. Using the akafusion couplers and equipment, pipe s, fittings and prefabricated pipe sections can efficiently be assembled. Raychem power cable accessories have over 40 years of design life which has been proven by longterm ageing tests and as has been witnessed in the field. Procedure for heatcold sinks cable joint termination. Some of the practical training for this course will take place in an operational area. This document describes the procedure of jointing of wires in the project, and to ensure that all concerned persons are familiar with the sequence of activities, utilization of resources, and execution of the works in compliance with applicable safety and quality procedures, and project documents and specification. It j desirable to obtain the detailed procedure front the cable manufacturers, 0. The methods used to terminate the cables vary according to the type of cable, type of connector and application. Cable jointing tools are also available to establish a precise chamfer, groove, pencilling, shaving or cut to mediumhigh voltage cable insulation multifunction tools with the capability of performing several stages of cable preparation are available and also contained tool kits for 11kv33kv cable jointing. The procedures apply the principles established by the the procedures apply the principles established by the scottishpower safety rules electrical and mechanical to achieve safety from the system and in.
When the various layers are removed, cuts should extend only partially. Most akatherm products can be welded by electrofusion. Also suitable for transition joints, and paper joints, with the use of supplementary kits. Ever since electricity cables were first used the problem has arisen of how to joint them together. There are a few different types of wire joints, alongside various methods for holding wires together. The aim of a cable jointer must therefore be to obtain a joint whose electrical properties are as good as the original cable both in electrical and mechanical terms. Nov 10, 2015 100 pair telephone jelly cable jointing aap log pura video dekhkar ceble jodana seekh sake hai. They also control the high stresses over the connectors in joints. This includes situations where a cable termination is being carried out in which case the cable sheath shall be bonded to the local earth system. One part cable joint mould construction with top seal and fixing clips simpler cable jointing installation process, less resin leakage. Press ends of the wires down close to the straight portions of the wire to prevent the ends from piecing through the.
These features allow the installation of the jointing system in. Working in partnership with a well established supplier of copper alloys to the electrical industry has enabled us to make a heavy investment in stock. Cable joints and terminations caledonian cables ltd. Within our range of tools and equipment, we stock low voltage, medium voltage and high voltage cable preparation tools, gas torches for heat shrink tubing installation and hydraulic cutting tools to cut through low voltage, medium voltage and high voltage cabling so all the essentials for cable jointing are all available from one source. This method statement defines the procedure step by step to implement the correct practices for installation of high voltage hv cable in order to ensure that the job execution complies with the project requirements and serves the intended function to satisfactory level. M seal kastex cable accessories for low voltage pvc pilc xlpe cables have.
A key to good cable preparation is the use of sharp, high quality tools. Knowing how to join electrical wires together is essential for both building and repairing circuits. View the complete range of cable jointing tools for stripping and preparing low, medium and high voltage power cables including 11kv, 33kv, 66kv and 2kv400kv polymeric cables with xlpe or epr insulation and bondedpeelable semiconductive cable screens motorised cable jointers tools are available for the smooth and efficient preparation, removal, peeling and chamfering of ehv cables with. Mseal kastex cable accessories for low voltage pvc pilc xlpe cables have been designed for simplicity in installation and a prolonged service life. Cable joints and repairs hse and las working together hse.
Not using the correct type of electrical joint can result in a useless circuit, at best, and a dangerous one, at worst. Method statement for installation of high voltage hv cables. Typical electrical cable jointing methods western union splice joint. The present invention relates to a method for jointing cables comprising a cable core constituted by one or more insulated conductors which may be enclosed within an impervious sheath, at least one layer of armouring elements, e. Enhancing the reliability of cable networks cable accessories. A flexible cable having a proprietary cable connector would generally be satisfactory provided the cable is properly made off and that the mechanical protection afforded by the enclosure is. By ensuring that delegates are conversant with the full range of joints, accessories and terminations in use today, we aim to provide a comprehensive update on.
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