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Phase Conductors Sizing

The default setting of ‘Auto-size for current-carrying capacity and voltage

drop limits’ means that when a calculation is carried out, cables with their

Size set to Auto and busbars with their Rating set to Auto, will be first

automatically sized for their current-carrying capacity and then, where

necessary, increased in size to meet the voltage drop set limits.

Alternatively, setting ‘Auto-size for current-carrying capacity only’ means

that conductors will not be re-sized to deal with circuits where the voltage

drop exceeds the set limit.

Voltage Drop Limits

The default setting applies the limits defined in BS 7671:2008 Appendix

12. The values of the limits for lighting and non-lighting loads will depend

on the Supply Type defined in the Voltage tab of the Source dialog. The

voltage drop allowance for wiring systems over 100 m in length

described in Appendix 12 can be included or not, as required.

Alternatively, the voltage drop limit to any final circuit can be set to a

specified value. The value can be expressed as a voltage drop limit in

percentage or absolute terms, or as a minimum voltage at the load

terminals.

AMTECH Quick Guide 2008 -17

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AM TECH mobile pro advance Especificaciones Pagina 15