Sizing and protection of conductors: Difference between revisions

Latest revision as of 13:46, 26 January 2024

Selection of cross-sectional-areas of cables is certainly one of the most important tasks of the design process of an electrical installation as this greatly influences:

the selection of overcurrent protective devices,
the voltage drop along these conductors
and the estimation of the prospective short-circuit currents

This chapters details the different steps and methodologies for conductor sizing. And the specific recommendations for neutral and Protective Earth (PE) conductors sizing.

Chapter G - Contents

External links

Electrical design software

@@ Line 1: / Line 1: @@
-__NOTOC__ __NOEDITSECTION__{{Menu_Sizing_and_protection_of_conductors}}
+<!-------------------------------------------------------------------------------------------------------------------------
-=== [[Conductor sizing and protection]] ===
+----            define HERE the LETTER of this chapter (A...S). It is then used in different places further below, in this page
+-------------------------v-------------------------------------------------------------------------------------------------
+---->{{#vardefine:letter|G}}<!--
-[[Conductor sizing: methodology and definition|Methodology and definition]]
-[[Overcurrent protection principles|Overcurrent protection principles]]
+--><div class="chapter-banner">[[File:Banner-chapter_{{#var:letter}}.jpg|class=chapter-banner-img|link=]]</div>
+{{Highlightbox|text=
+<!-----------------------------------------------------------------------------------------------------------------------------
+---- Description text for this chapter - START
+------------------------------------------------------------------------------------------------------------------------------>
+Selection of cross-sectional-areas of cables is certainly one of the most important tasks of the design process of an electrical installation as this greatly influences:
+* the selection of overcurrent protective devices,
+* the voltage drop along these conductors
+* and the estimation of the prospective short-circuit currents
+This chapters details the different steps and methodologies for conductor sizing. And the specific recommendations for neutral and Protective Earth (PE) conductors sizing.
+<!-----------------------------------------------------------------------------------------------------------------------------
+---- Description text for this chapter - END
+------------------------------------------------------------------------------------------------------------------------------>
+}}
+<!--
-[[Practical values for a protective scheme|Practical values for a protective scheme]]
-[[Location of protective devices|Location of protective devices]]
+--><!-----------------------------------------------------------------------------------
+---add chapter TOC, based on Hierarchy (DO NOT MODIFY!)
+----------------------------------------------------------------------------------------
+-->{{ch-toc|letter={{#var:letter}}}}
-[[Conductors in parallel|Conductors in parallel]]
+<!-- -----------------------------------------------------------------------------------
+---- define all properties and categories for this chapter landing page (DO NOT MODIFY!)
+----------------------------------------------------------------------------------------
+-->__NOTOC__ __NOEDITSECTION__<!--
+-->[[Has chapter letter::{{#var:letter}}| ]]<!--
+-->{{#isin:{{MediaWiki:mainpage}}}}<!--
+-->[[Category:eig-ch-landing-pages]]<!--
+-->{{ch-category|{{#var:letter}}}}<!--
+--><div>{{#addbodyclass:Chapter-TOC}}</div><!--
+--><!-- ------------------------------------------------------------------------------->
-=== [[Practical method for determining the smallest allowable cross-sectional area of circuit conductors|Practical method for determining the smallest allowable cross-sectional area of circuit conductors]]<br> ===
-[[General method for cable sizing|General method for cable sizing]]
-[[Recommended simplified approach for cable sizing|Recommended simplified approach for cable sizing]]
-[[Busbar trunking systems|Busbar trunking systems]]
-=== [[Determination of voltage drop|Determination of voltage drop]]  ===
-[[Maximum voltage drop limit|Maximum voltage drop limit]]
-[[Calculation of voltage drop in steady load conditions|Calculation of voltage drop in steady load conditions]]
-=== [[Short-circuit current]]  ===
-[[Short-circuit current at the secondary terminals of a MV/LV distribution transformer|Short-circuit current at the secondary terminals of a MV/LV distribution transformer]]
-[[3-phase short-circuit current (Isc) at any point within a LV installation|3-phase short-circuit current (Isc) at any point within a LV installation]]
-[[Isc at the receiving end of a feeder as a function of the Isc at its sending end|Isc at the receiving end of a feeder as a function of the Isc at its sending end]]
-Short-circuit current supplied by an alternator or an inverter: refer to [[Characteristics of particular sources and loads]]
-=== [[Particular cases of short-circuit current]]  ===
-[[Calculation of minimum levels of short-circuit current|Calculation of minimum levels of short-circuit current]]
-[[Verification of the withstand capabilities of cables under short-circuit conditions|Verification of the withstand capabilities of cables under short-circuit conditions]]<br>
-=== [[Protective earthing conductor]]  ===
-[[Connection and choice for protective earthing conductor|Connection and choice for protective earthing conductor]]
-[[Sizing of protective earthing conductor|Sizing of protective earthing conductor]]
-[[Protective conductor between MV/LV transformer and the main general distribution board (MGDB)|Protective conductor between MV/LV transformer and the main general distribution board (MGDB)]]
-[[Equipotential conductor|Equipotential conductor]]
-=== [[The neutral conductor]]  ===
-[[Sizing the neutral conductor|Sizing the neutral conductor]]
-[[Protection of the neutral conductor|Protection of the neutral conductor]]
-[[Breaking of the neutral conductor|Breaking of the neutral conductor]]
-[[Isolation of the neutral conductor|Isolation of the neutral conductor]]
-=== [[Worked example of cable calculation|Worked example of cable calculation]]  ===
-<br>
 ==External links==
-*[http://www.technical-publications.schneider-electric.com/sites/corporate/en/products-services/technical-publications/technical-publications.page Electrical Conceptual information given in "Cahiers Techniques"]
+*[https://www.se.com/ww/en/product-category/26426075-energy-management-software-solutions/?filter=business-4-low-voltage-products-and-systems Electrical design software]
-*[http://www.soft.schneider-electric.com/ Electrical installation software]
-[[ru:Выбор сечения и защита проводников]]
+<!-- ----------------------------------------------------------------------------------------
-[[zh:电路保护]]
+---- ADD BELOW external links, inter-language links, and possibly other related content links
+-------------------------------------------------------------------------------------------->

Sizing and protection of conductors: Difference between revisions

Latest revision as of 13:46, 26 January 2024

Chapter G - Contents

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