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Central Heating & Storage Heaters Forum
180v on control demand neutral,
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 520084" data-attributes="member: 250"><p>I have re read this multiple times and I still cant grasp exactly what your supply arrangement is..</p><p></p><p>AND what trips?</p><p></p><p>MCB or RCD?</p><p></p><p>Manufactures guidance states 1x Supply from CU to operate the full load heating part of the boiler..</p><p></p><p>And off this supply there should be a fused spur to supply 3A for the control wiring..</p><p></p><p>I get the impression you have two separate supplies from the CU via different MCB's???</p><p></p><p>If you have..</p><p></p><p>and these are not supplied via the same RCD..</p><p></p><p>then I would guess the RCD will trip, just the same as with any crossed circuits..</p><p></p><p> Guinness</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 520084, member: 250"] I have re read this multiple times and I still cant grasp exactly what your supply arrangement is.. AND what trips? MCB or RCD? Manufactures guidance states 1x Supply from CU to operate the full load heating part of the boiler.. And off this supply there should be a fused spur to supply 3A for the control wiring.. I get the impression you have two separate supplies from the CU via different MCB's??? If you have.. and these are not supplied via the same RCD.. then I would guess the RCD will trip, just the same as with any crossed circuits.. Guinness [/QUOTE]
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180v on control demand neutral,
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