Main menu home About production Products and services Price list news Useful Section selection Calculation of cable length Dimensions of containers Drum dimensions and weight Cable length for ... Identification threads Collection of GOSTs Standard lengths Standard windings ... Procurement Contacts Certificates Driving directions Vacancies Special offer! WE WILL PRODUCE UNDER THE ORDER LARGE PARTY PVS WIRES ORANGE Latest news Certificates Price list Standard windings on drums Quality Management System Certificate of Conformity Contacts KG, KG-HL Thursday, 07.24.2014 Selection of wire cross-section Electrical wiring must meet the requirements of safety, reliability and economy. Therefore, it is important to correctly calculate the length and cross-section of the wires required for the installation of electrical wiring. The length of the wire is calculated according to the wiring diagram. To do this, measure the distances between adjacent locations of shields, sockets, switches, branch boxes, etc. on the diagram. Then, using the scale in which the diagram is drawn, calculate the length of the wire segments; add at least 100 mm to the length of each segment (the need to connect wires is taken into account). The length of the wire can also be calculated by measuring directly on shields, panels, walls, ceilings, etc. the line segments along which the wires should be laid. The wire cross-section is calculated from the voltage loss and the permissible continuous current load. If the calculated sections turn out to be unequal, then the value of the larger section is taken as the final result. The voltage loss is caused by a voltage drop in the wires connecting the current source to the electrical receiver. It should not exceed 2-5% of the rated voltage of the power supply. The cross-section of wires for voltage loss is calculated when designing electrical networks from which power consumers of industrial enterprises, transport, large residential and public buildings, etc. are powered. When designing small electrical installations, for example electrical installations of individual rooms, homemade devices, etc., the voltage loss in the wires can be neglected, since it is very small. To calculate the cross-section of wires for the permissible continuous current load, it is necessary to know the rated current that must flow through the projected electrical wiring. Knowing the rated current, the wire cross-section is found from the table. Cross-section of current- conducting conductor, mm2 Current, for wires and cables with copper conductors, A Current, for wires and cables with aluminum conductors, A One- Two-core Three-core One- Two-core Three-core When laying air air land air land air air land air land 1.5 23 19 33 19 27 - - - - - 2.5 thirty 27 44 25 38 23 21 34 19 29 four 41 38 55 35 49 31 29 42 27 38 6 fifty fifty 70 42 60 38 38 55 32 46 ten 80 70 105 55 90 60 55 80 42 70 16 100 90 135 75 115 75 70 105 60 90 25 140 115 175 95 150 105 90 135 75 115 35 170 140 210 120 180 130 105 160 90 140 fifty 215 175 265 145 225 165 135 205 110 175 70 270 215 320 180 275 210 165 245 140 210 95 325 260 385 220 330 250 200 295 170 255 120 385 300 445 260 385 295 230 340 200 295 150 440 350 505 305 435 340 270 390 235 335 185 510 405 570 350 500 390 310 440 270 385 240 605 - - - - 465 - - - - A source © 2000-2013 Nizhny Novgorod Cable Plant LLC NKZ "Elektrokabel NN". All rights reserved. Tel / fax (83145) 5-76-32, 5-76-25, 5-76-27, 5-76-29, 5-76-35