IEC - Cable Installation Data

In this section, the user selects different combinations of cable installation data for the cable to be sized.

• External Situation - used to select the cable laying situation if the cable is laid in air or underground

• Permitted Voltage Drop - used to select permissible limit values

• Starting Volt Drop - used to select the starting voltage drop limit

• Ambient Temperature - used to select the ambient temperature

• Cable Length - used to specify the length of the cable to be sized

• Insulation Type - used to select the insulation type of the cable

• Material - used to select the material of the cable

• Neutral Core - used specify whether or not the cable has a neutral core

• Earth Core - used specify whether or not the cable has an earth core

• Armoured - used specify whether or not the cable is armoured

• Screened - used specify whether or not the cable is screened

• Single / Multi - used to specify whether the cable is Single-Core or Multi-Core

• Core Grouping - used to select the cable core grouping from standard cable sizing data - see the table below for how this is calculated

• Parallel Option - used specify whether or not parallel cables are to be used

• Third Harmonic content of line current - used to select the third harmonic content of the line current

• Rated Voltage - used to enter the maximum voltage rating of the conductor to be sized

• Arrangement - used to select the cable laying arrangement

• Touching and Spaced - used to specify whether cables are touching or spaced

• Method - used to select a cable rating method from standard cable sizing data

• No. of Circuits - used to select the number of circuits

• Contact Type - used to specify whether cables are laid flat or in trefoil formation

• No. of Trays - used to select the number of trays

• Touching Type - used to select the cable touching type (trefoil or laid flat)

• Distance between Cables - used to select the distance between cables if cables are laid underground

• Soil Thermal Resistivity - used to select the thermal resistivity of soil

Once all cable configurations have been selected, click on the Size Cable button to calculate the cable size.

The user can save the cable sizing result by clicking the Save button.

The user can cancel the cable sizing result by clicking the Cancel button.

Core Grouping Calculation Table

Note:
If Earth is selected then for single-core cable type a core is created in the Cable Schedule as a child cable.