Electrical power cables may be installed as permanent wiring within buildings, buried in the ground and run overhead or exposed. Bare Overhead Conductors are used in overhead transmission and distribution network applications.
They are also used for un-insulated hook ups, jumpers, grounding conductors and other applications. Aerial bundled cables also aerial bundled conductors or simply ABC are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor.
Alan L. Electric Cables Handbook provides a comprehensive and substantial coverage of all types of energy cables—-from wiring and flexible cables for general use, to …. If you are interested in olex cables handbook ,Please Feel free to give your inquiry in the form or the email below.
We will reply you in 24 hours. Email: [email protected]. Global expert in cables and cabling systems … Do you know that Nexans Olex provides a large product…. Olex manufactures a complete range of cables from 3. These cables are generally…. Inside dia. Standard colour for all shrouds is orange. Sizes 1, 2 and 2L are stocked in black. For black shroud part numbers add B to the orange item number in the LH column. Where a flexible cord is wound on a drum, multiply current carrying capacities by the following factor: Number of layers: 1 2 3 4 Derating factor: 0.
DC resist. The values are based on the use of black XLPE. Under normal circumstances there will always be some air movement and the rating for 1. General Note applies to all following current rating tables. The values are based on the use of black PVC.
Unenclosed Enclosed Buried Underground Cond. Spaced Spaced Touching Conduit Partially Completely direct ducts size from in air surrounded surrounded by thermal by thermal surface insulation insulation mm2 Cu Al 13 16 24 30 38 52 67 52 90 70 84 Cu Al Cu Al 8 20 10 26 14 36 19 46 24 58 32 78 43 33 58 45 72 56 Cu Al 20 26 36 46 58 78 78 Cu Al Cu Al 24 Cu Al 16 20 28 37 47 65 86 67 91 Cu Al 16 21 30 38 47 65 84 65 87 Unenclosed Cond.
Spaced Spaced Touching Conduit size from in air surface mm2. Cu 25 32 45 59 75 Cu 24 31 44 58 73 99 Cu 20 25 36 47 59 81 Table of ratings are also applicable to armoured cables.
Cu Al 15 19 27 37 46 64 85 66 88 Cu Al 14 18 26 34 44 60 80 62 83 Cu Al 13 16 23 30 39 52 68 52 90 70 87 Cu Al 11 14 20 27 35 48 64 49 85 66 81 99 Cu Al 17 21 30 39 50 66 88 Cu Al 17 21 30 39 50 66 86 66 87 Cu Cu Al 17 22 31 42 53 73 97 75 Cu Al 16 20 28 37 46 63 82 63 85 Spaced Spaced Touching Conduit Partially Completely direct ducts size from in air surrounded surrounded surface by thermal by thermal mm2 insulation insulation.
Spaced Spaced Touching Conduit Partially Completely direct ducts size from in air surrounded surrounded surface by thermal by thermal insulation insulation mm2. Cu 24 31 43 57 73 99 Cu 21 27 38 50 63 86 Cu 17 22 32 41 51 71 93 Cu 14 18 25 33 41 57 74 Cu 20 25 36 46 57 77 Cu 20 25 36 46 57 77 99 Cu 24 30 42 54 67 88 Cu 13 16 23 31 40 54 72 97 Cu 12 15 22 29 37 51 68 91 Cu 11 14 20 25 33 44 58 76 94 Cu 16 20 28 38 48 66 88 Cu 14 19 26 35 45 62 83 Cu 13 16 24 30 38 53 68 91 Cu 12 15 21 28 36 49 66 89 Cu 16 20 29 37 46 63 Cu 16 20 29 37 46 63 81 Cu Al Spaced Touching Exposed Conduit Partially Completely direct ducts size to sun in air surrounded surrounded by thermal by thermal insulation insulation mm2.
Simplified tables of current ratings and voltage drops for commonly used cables are given on pages 73 Installation conditions Olex cables are available for aerial, underground and submarine installations as well as in conduit, on racks or trays in air. Special constructions available include: Brass or copper taped or nylon sheathed cables for resistance to termite and marine borer.
Steel wire armoured for areas where there is a high risk of mechanical damage. Lead alloy sheathing as a barrier to moisture or hydrocarbons.
They are resistant to occasional contact with most oils and solvents, clean and easy to handle and coloured to assist phase identification. PVC is inherently resistant to ultraviolet radiation and although some colours may fade the material will not significantly degrade due to the effects of sunlight and weather, maintaining its physical integrity if not physically abused. Care should be taken where cables are subjected to extremes of temperature or contact with crude petroleum, caustic materials or aromatic solvents.
In addition, EPR is halogen free and therefore does not emit toxic or corrosive by-products when burnt. Although having lower insulation resistance than EPRit is suitable for low voltage cable insulation and is used as such in welding cables because of its oil resistance. For special purposes a sheath of Olex EA Ethylene Acrylic material can be provided subject to special order.
This material is halogen free, extremely flame retardant and has better oil resistance than CPE. It is halogen-free and also free of heavy metals such as lead and antimony. It has low smoke and toxicity when burned.
It is a suitable alternative to PVC and is becoming more widely specified where there are environmental concerns. Normal state properties are suitable for continuous operation at C. It is halogen-free, lead and antimony-free, and does not emit toxic or corrosive products when burned. Olex offers this thermoplastic, halogen and heavy metal-free sheathing. The material has reasonable oil resistance and flexibility, with a high resistance to spread of fire.
Except for a group of single core cables carrying the phase currents of a circuit, cables should be spaced to allow heat to escape. The preferred formation for three phase conductors is a trefoil or cloverleaf pattern although flat formation may also be used.
Sheaths should be in contact with one another in either case. A single core cable generates an alternating magnetic field around itself which can cause large increases in voltage drop and power loss due to transformer effect when ferrous metal iron and steel is allowed to encircle the cable.
Where glanding is required it is usual to cut out a panel and replace this with a non-ferrous metal or plastic plate in which the three or four glands are mounted. Should plastic or non-ferrous gland plate material not be available, an alternative is to cut a slot hacksaw blade width is adequate between adjacent gland holes. This will provide physical and electrical isolation for the eddy current paths and stop the cable from overheating.
Nominal area active conductors mm 2 1 1. Maximum operating temperatures for various types of cable insulants. Nominal Conductor conductor type area mm 2 0. A Circular Mil. The term M. Diameter mm 2 A. The gauge number can apply to a single wire or to a stranded or bunched conductor. The cross-sectional areas given apply to single wire only. The larger gauges are sometimes written using a number to denote the number of zeroes, e.
During Type Voltage Instal. Motor current table, Amperes approx. Power kW hp 0. Recommended maximum number of thermo plastic insulated unsheathed single core 0. Nominal area mm 2 1 1. Notes: 1. For PVC flexible conduits, the recommendations are based on conduits used without fittings or with fittings only at the ends of the conduit run. Where intermediate fittings are used in a run of PVC flexible conduit, an appropriate reduction should be made in the number of cables drawn into the conduit.
Table suitable for use with Olex manufactured product only. Calculated maximum number of thermoplastic insulated and sheathed single core copper or aluminium cables permitted in metallic and non-metallic conduit or pipe. One cable in conduit or pipe Two cables in conduit or pipe Three or more in conduit or pipe Note: The above values should not be exceeded. Maximum safe pulling tension. Conductor area mm 2 1. Subscription Would you like the next edition of The Handbook delivered to your door?
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