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    What to look for when having solar panels installed

    My mother intends to have solar PV panels installed soon but this is beyond my field of expertise. What should she look for when choosing a PV system and the installer? She has a bungalow in mid Essex. The rear of the pitched roof faces roughly south. Do any of the top installers on here cover...
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    Spur calculation confusion!

    If you use max Zs of 0.86, subtract Zs for the ring of 0.78, this gives max R1+R2 for the radial of 0.08. Use this in the final calculation instead of 0.12 and you get 8.677m! The question gives max Zs from the regs as 1.07. 80% of this is 0.856. They used 0.86. Like you said, the current OSG...
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    Kitchen on Stairs Landing???

    Part P requires you to comply with all other parts of the building regs. If a building inspector was signing off this job I doubt he would care which floor the kitchen is on, but he would care about the layout. As I understand it a kitchen would be required to have a door. And on higher levels...
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    pay leven card payment

    I agree that online banking is a more straight forward way than paying by card. It would be even easier though if all banks worked like Barclays. You don't need to give out your bank details and you get a message when the payment is transferred. Depending on the work you do, some customers may...
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    pay leven card payment

    I've never used one of these services but I have looked into a few recently. With Payleven you buy the card reader to use with certain smartphones then pay 2.75% per transaction, with no ongoing fees, https://payleven.co.uk Similar services include: https://SumUp.co.uk www.iZettle.com/gb...
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    Minimum protective conductor size

    I always thought that 1mm CPC on old 2.5 T&E was only a problem with rewirable fuses (BS3036). The max Zs tables in the OSG show that this is acceptable for up to 20A but not permitted for 30A rewirables. I was taught that a quick solution is a plug-in breaker. As the OP points out, the Green...
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    EIC certs?? best place to get 'em from?

    Your annual assessment may be next Jan / Feb, but your direct debit will be the anniversiary of your first payment in Nov.
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    Dc electrical course

    What sort of d.c. circuits? Micro-electronics? Railways?
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    communal isolator

    I presume that the landlord's isolator is a switch fuse. If you switch it off and remove the cover, there will probably be a rewirable fuse in the left hand side in a ceramic holder. By limiting the load this will give a degree of protection to the tails. I can't see a supply cable into the...
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    Advice please. CU change and incoming supply

    It looks like you have some strands of wire from the sheath of the supply cable, by which the DNO provides your main earth. These go into a connector block which connects via a Henley style block to the 3 existing CCU/DBs. If there is enough slack on the supplier's earth, the connector block...
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    Bakelite switches

    I'd say that if the fittings are in good condition then it could be acceptable to retain them. You may find though that some are cracked and badly discoloured, with tiny terminals and multicoloured paint around the edges. Also imperial threads and switches with wooden backboxes. With old...
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    Cable size and live wire colour change

    3 x 2.5mm cable means a 3 core flex, with each core being 2.5mm. You have one conductor terminated in each of the 3 terminals. It does not mean 3 lengths of 3 core run in parallel. The alternative mentioned earlier of 5 x 1.5 mm cable refers to a single length of 5 core flex, with 1.5mm...
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    Todays EICR - can you spot the mistake?

    With the new looking meter, henley block, brown tails and tags under the meter, these have obviously been replaced in the recent past. This is confirmed by the sticker dated 2 years ago. The shiny matching seals on everything suggest that the small red cables were put in the new henley block by...
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    Quick question! - polarity

    I presume you mean that the CPC was an incomplete ring and therefore only one of the two CPCs coming into the socket was connected back to the main earth terminal. You still had an earth connection at the socket and so you could still measure R1+R2 and Zs, but treating the CPC as a radial. These...
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    Any suggestions please...?

    The Click Essentials catalogue can be downloaded from SCOLMORE INTERNATIONAL LTD - WIRING ACCESSORIES | CLICK Essentials, the essentials product group is just that ? ESSENTIAL It's on page 24. The part number is now PRC020. From Google, suppliers include: CLICK White T2 BC Cordgrip TRS...
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    Any suggestions please...?

    Flicking through the Click catalogue this afternoon I noticed they do a lampholder (CA020) with a waterproof grommet in the top.
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    M.c.b.

    Theirs are Proteus
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    M.c.b.

    I seem to remember that Square D components are a close match for using on Protek boards. They are available from Toolstation (amongst others).
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    M.c.b.

    QVS do Protek boards, www.qvsdirect.com
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    2391-2

    These places list the C&G 2391-20 on their websites, Total Electrical Training, Harlow www.totalelectricaltraining.com/certification-of-electrical-installations-course-2391-20.html Trade Centre Training, Harlow www.tradecentretraining.com/courses/2391-20-design-erecting.html British Gas...

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