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Electrician Talk Forum
You meet some damn stupid companies...
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<blockquote data-quote="ProDave" data-source="post: 437741" data-attributes="member: 6969"><p>A heat pump system normally only heats the HW tank to 45 degrees. Beyond that the COP falls off severely. So the immersion is there to heat the tank to 65 degrees usually once every 2 weeks as an anti legionella measure.</p><p></p><p>All their wiring is in flex. Normal high temp white 3 core flex for the immersion and CY flex for the HP. Yes it looks like 2.5mm on a B40. As far as I can make out, the 3 core CY is feeding two circuits. Brown from a B15, Black from the B40 and grey (sleeved blue) as N. So if both circuits draw full load, what will be the current through the common 2.5mm neutral?</p><p></p><p></p><p></p><p> </p></blockquote><p></p>
[QUOTE="ProDave, post: 437741, member: 6969"] A heat pump system normally only heats the HW tank to 45 degrees. Beyond that the COP falls off severely. So the immersion is there to heat the tank to 65 degrees usually once every 2 weeks as an anti legionella measure. All their wiring is in flex. Normal high temp white 3 core flex for the immersion and CY flex for the HP. Yes it looks like 2.5mm on a B40. As far as I can make out, the 3 core CY is feeding two circuits. Brown from a B15, Black from the B40 and grey (sleeved blue) as N. So if both circuits draw full load, what will be the current through the common 2.5mm neutral? [/QUOTE]
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