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<blockquote data-quote="DonkeyDong" data-source="post: 12140" data-attributes="member: 156"><p>All,</p><p></p><p>Currently I have DB1 split load, feeding DB3 (which is 30mA split load) via a submain (DB3 is an external building) with exported PME - not ideal.</p><p></p><p>I need to insert a new DB (DB2) in between DB1 and DB3. I intented to not use exported PME and switch to TT on DB2.</p><p></p><p>So basically, DB1 non RCD side via submain to DB2. DB2 will need to have a 100mA RCD (due to TT). This will then feed via a breaker to DB3 (which has 30mA RCD fitted) - which means DB2 100mA will now need to be type S to provide discrimination.</p><p></p><p>Eventually there will be DB4 (fed from DB2).</p><p></p><p>Any comments relating to the above ?</p><p></p><p>D.</p></blockquote><p></p>
[QUOTE="DonkeyDong, post: 12140, member: 156"] All, Currently I have DB1 split load, feeding DB3 (which is 30mA split load) via a submain (DB3 is an external building) with exported PME - not ideal. I need to insert a new DB (DB2) in between DB1 and DB3. I intented to not use exported PME and switch to TT on DB2. So basically, DB1 non RCD side via submain to DB2. DB2 will need to have a 100mA RCD (due to TT). This will then feed via a breaker to DB3 (which has 30mA RCD fitted) - which means DB2 100mA will now need to be type S to provide discrimination. Eventually there will be DB4 (fed from DB2). Any comments relating to the above ? D. [/QUOTE]
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