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Domestic Cooker and Hob install - need advice please
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<blockquote data-quote="freedomrun" data-source="post: 244149" data-attributes="member: 7914"><p>The Customer is a friend of family - so not charging for my time there. The Kitchen firm informed the customer that as they were swapping old cooker and hob freestanding unit for new (but seperate oven &amp; Hob) and not altering the wiring of the kitchen from the JB to the Isolator, then no need to notify under Part P. They have, however, put the 2.5mm on the Oven and 4mm on the Hob (i'm thinking that the 6mm that was to the JB previously and for the former freestanding cooker/hob unit, would not fit the terminals of the Hob and they required another cable to run the new seperate Oven from the JB. I calculate the total draw of both units with diversity to be 23.7 A (isolator has a socket outlet), the Oven itself drawing 9.13A before diversity taken into account. If i leave the 2.5mm to the oven and 4mm to the Hob, then i derate the 45A mcb to a 30A mcb. The Oven itself will be better protected that way and it has to be on minimum 20A isolator anyway, as the manufacturers instructions take presidence - or have i missed something? Cheers.</p></blockquote><p></p>
[QUOTE="freedomrun, post: 244149, member: 7914"] The Customer is a friend of family - so not charging for my time there. The Kitchen firm informed the customer that as they were swapping old cooker and hob freestanding unit for new (but seperate oven & Hob) and not altering the wiring of the kitchen from the JB to the Isolator, then no need to notify under Part P. They have, however, put the 2.5mm on the Oven and 4mm on the Hob (i'm thinking that the 6mm that was to the JB previously and for the former freestanding cooker/hob unit, would not fit the terminals of the Hob and they required another cable to run the new seperate Oven from the JB. I calculate the total draw of both units with diversity to be 23.7 A (isolator has a socket outlet), the Oven itself drawing 9.13A before diversity taken into account. If i leave the 2.5mm to the oven and 4mm to the Hob, then i derate the 45A mcb to a 30A mcb. The Oven itself will be better protected that way and it has to be on minimum 20A isolator anyway, as the manufacturers instructions take presidence - or have i missed something? Cheers. [/QUOTE]
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Domestic Cooker and Hob install - need advice please
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