replacing 300ma 4293

Discuss replacing 300ma 4293 in the Australia area at ElectriciansForums.net

E

essexboy

hi guys

right, ccu is feed by 16mm swa(15m run) from 100ma rcd unit in garage. ccu main switch is 300ma rcd and understand this has to be changed to a 30ma rcd to provide discrimination but from what i know an rcd can not be used for main switch can anyone confirm this or is there any other options?
 

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