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Old 07-12-2009, 02:04 PM   #1
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Design Stage


hi all

could someone please explain to me why i need the follwing information at the design stage of an istallation -

- Prospective earth fault current (I)
- The value of external impedance (Ze)
- Assumed current demand of the installation
- Disconnection times of certain light fittings

Many thanks

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Old 07-12-2009, 04:43 PM   #2
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Design Stage


because whoever is going to approve your installation requires it.


still in school I see.


http://www.diychatroom.com/f18/eal-c...-course-45570/

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