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}}
+<!-------------------------------------------------------------------------------------------------------------------------
-=== [[General Contents|General Contents]]  ===
+----            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}}<!--
-Methodology and definition
-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
-Location of protective devices
+--><!-----------------------------------------------------------------------------------
+---add chapter TOC, based on Hierarchy (DO NOT MODIFY!)
+----------------------------------------------------------------------------------------
+-->{{ch-toc|letter={{#var:letter}}}}
-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> ===
+==External links==
+*[https://www.se.com/ww/en/product-category/26426075-energy-management-software-solutions/?filter=business-4-low-voltage-products-and-systems Electrical design software]
-General
+<!-- ----------------------------------------------------------------------------------------
+---- ADD BELOW external links, inter-language links, and possibly other related content links
-General method for cables
+-------------------------------------------------------------------------------------------->
-Recommended simplified approach for cables
-Busbar trunking systems
-=== [[Determination of voltage drop|Determination of voltage drop]]  ===
-Maximum voltage drop limit
-Calculation of voltage drop in steady load conditions
-=== [[Short-circuit current|Short-circuit current]]  ===
-Short-circuit current at the secondary terminals of a MV/LV distribution transformer
--phase short-circuit current (Isc) at any point within a LV installation
-Isc at the receiving end of a feeder in terms of the Isc at its sending end
-Short-circuit current supplied by an alternator or an inverter
-=== [[Particular cases of short-circuit current|Particular cases of short-circuit current]]  ===
-Calculation of minimum levels of short-circuit current
-Verification of the withstand capabilities of cables under short-circuit conditions<br>
-=== [[Protective earthing conductor|Protective earthing conductor]]  ===
-Connection and choice
-Conductor sizing
-Protective conductor between MV/LV transformer and the main general distribution board (MGDB)
-Equipotential conductor
-=== [[The neutral conductor|The neutral conductor]]  ===
-Sizing the neutral conductor
-Protection of the neutral conductor
-Breaking of the neutral conductor
-Isolation of the neutral conductor
-=== [[Worked example of cable calculation|Worked example of cable calculation]]  ===
-== [[Media:EIG-Chap_G-G-2010_haute_def.pdf|Download pdf file, 2010 edition in English]] ==

Sizing and protection of conductors: Difference between revisions

Latest revision as of 13:46, 26 January 2024

Chapter G - Contents

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