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Dave did say

I would say incorrect wiring at cu allowing voltage to socket Socket feeding lighting when cutting through brown to E As its pme will act as neutral bringing lead lamp on

Well even though the neutral has been disconnected the earth is still in effect connected now acting as the neutral.

If the isolate is double pole, and the cpc is at earth potential, then i would assume that something the split load kit has been incorrectly wired

Yes its treated the same. If the the extract is not running then its an opening,the same as any other. When the extract is running then theres even less chance of any re entry of combustible gases, so 300mm is the minimum. If the device was drawing air in from outside then you would need to...

Well providing the voltage doesn't fall outside the nominal i see no issue.

Hi sidewinder

Well you are correct, just trying to keep it simples. as in all supply's are TT

Is this a positive pressure fan, as in draws air from outside to in?

I wonder what would happen to other TT supplies connected to the same TX?

To a evaporation unit

Sorry Steptoe, misunderstood, i beleive now you mean distance from a terminal to an opening. Ok If its "Fanned Draught" the minimum distance is 300mm regardless of position. If its "Natural Draught" then distance differs with position and rating of appliance. Upto 7 KW 300mm regardless 7Kw...

Just found a little snip it in Part II BS5440 -2 commentary states where extract systems operate and may effect the performance of the flue, additional ventilation of 50% of the required will normally suffice. A spillage test will still need to be carried out for confirmation.

Steps http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADJ_2010.pdf, read page 21 Checked BS 5440 Checked GSIUR Theres no distance mentioned, if the manufactures state this distance then this will override any of the standards anyway. The bets guidance is in Part J of the building regs...

Where is this place, can i come:)

You apply them to it to find your Iz Your welcome! Im a relative newbie myself so lots to learn too! Nothing wrong with that, in fact its how you need to be. :)

Does the circuit trip with the cooker disconnected?

Hi john

Well as i stated in a earlier post, refer to the note at the bottom of the tables in BS 7671, as far as the IEE are concerned, column 12 of the "Schedule of Tests Results", the measured value with the appropriate adjustment is required.