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clarification of cu upgrade on TT installation

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Discuss clarification of cu upgrade on TT installation in the Australia area at ElectriciansForums.net

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Stever_777

Hi guys, after flat bashing for years, I'm now on my own and seem to only be working on TT installations. Can someone just clear this up for me please?When installing a new cu in a TT installation, do I need a 100mA time delayed main switch or can I just put a normal main switch in and have a split 30mA board.Steve
 
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