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    Mechanical Protection for Tails between Meter Cupboards on outside wall

    Something like this is "correct" to use in that it meets the appropriate certification for electrical use: https://www.cef.co.uk/catalogue/products/29966-32mm-pvc-round-conduit-heavy-gauge-white-3m-length I have not checked that 32mm is sufficient for tails & earth but you can check that, but I...
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    Pricing and Timing

    Apologies, after my query about 110% the rest of my comments were intended for the OP.
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    Leakage Clamp Meter Kyoritsu 2432 or Uni-T UT251

    You ought to be able to get an acceptable clamp meter for much less, provided you only need AC measurements. DC clamp meters do cost a lot more. For example in the UK: https://cpc.farnell.com/multicomp-pro/mp780050/mini-leakage-current-tester/dp/IN08364 Note that many clamp meters don't offer...
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    individual RCBOs or a main breaker RCBO? and what trip level 10mA or 30mA

    In general an RCBO board is a much better choice, if there is a fault your impact is limited to only the faulted circuit and not others off the same RCD. As for 10mA versus 30mA that will come down to local regulations. What you have to remember is the RCD side dose not limit current, it limits...
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    Pricing and Timing

    I guess you mean +110%? If you are self-employed so are running the business you need to be thinking around this, i.e. charge double what your pay will cost. You have various overheads to cover as well as things like sick-pay and holiday time that others take for granted, and potentially quiet...
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    UK RCD tripping explanation

    It depends on how "hard" the fault is and how much current flow. In your 32A B-curve socket example: 0 to 0.015A nothing happens 0.015 to 0.030A possibly the RCD trips 0.03A to 96-160A, RCD trips, no MCB trip as too slow on thermal side 160A or more MCB trips first on magnetic side, but RCD is...
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    Working out the length of a ring finals circuit

    Being more specific that rule is an exception to the usual case where the protection against overload has to match the cable. In the RFC case you are allowed 50% over due to the two 'legs' of the ring largely sharing the current but they pin it down to this case. The earlier regs allowed this...
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    Working out the length of a ring finals circuit

    Yes, the regs say 5% max which is 11.5V Yes and no. If it was designed for 16A of typical load then it would meet the VD requirement, and without any special design information you would assume that a 16A MCB means it is designed for a 16A load. However, if you need more than 16A because it...
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    Testing ip camera without the nvr

    If you can log in to your own router it should list all devices that it is serving (DHCP assignment of an IP address) and hopefully you will see the camera listed. Not all devices give their name, or if they do it is a random gibberish string, so you might have to find it by elimination of what...
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    Electricians Vans, any of you have electric vans? How good are they now?

    One guy has no car so uses the bus, we would probably let him keep any van mostly at home for that reason, but if we have more staff then it might get shuffled around to be fair to all. Longer term we won't be on site all of the time which is another reason that work EV charger option is not...
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    Working out the length of a ring finals circuit

    Yes. Though see @Pretty Mouth comment about accuracy on typical measured r2 Not quite, but a quick check in the OSG Table 7.1(ii) shows the max length is 106m for 2.5mm so you are right it will fail. The drop for a RFC is not end-end as it is for a radial. Starting with the Zs situation, in...
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    Testing ip camera without the nvr

    As @mainline has pointed to, basically almost every camera will have a web page that lets you configure it and see the images. If you have got a working connection the camera should become available. Most IP cameras I have used are PoE to save extra power supplies per camera, most NVR support...
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    Working out the length of a ring finals circuit

    The r1 and r2 values you have are both measured end-end on the RFC, so if using tables of R1+R2 (such as Table I1 in the OSG) then you would add them and divide by the table value: length = (r1 + r2) / R1plusR2perLength = (1.15 + 1.80) / (19.51/1000)
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    Electricians Vans, any of you have electric vans? How good are they now?

    At our place of work we could have chargers, but none of us have them at home and a few (like myself) have no allocated parking place to even install a charger for home use (I live in a 4+4 block of flats of Victorian era). We might get a work van for a new project as we may have the odd 250+250...
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    Failed socket!

    If the plug works in most sockets but not one, then the socket has a problem. If the plug is out of spec as nasty fake one, or been bent by abuse, that could be a factor. Change the socket for a decent make. If the plug looks at all dodgy, change it as well.
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    Failed socket!

    I remember someone mentioning gas boilers and the flame detectors not liking it if the supply want IT when on generator.
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    Failed socket!

    Also worth checking if the sockets are fed from different breakers and one has tripped and you did not spot it. However, any dodgy socket (visible signs of damage, not being reliable, or having iffy-feeling switches) should be replaced, as a poor contact can overheat leading to further damage...
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    What is it called IR testing?

    That seems a really annoying long time for most test! Maybe if it only applied above 500V it would make some sense to give folks a moment to think "Do I really want 1kV+ on this circuit?"
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    Unreasonably high invoice bill from an electrician

    I would think that most employers now have to think about the lone working risks and address them as far as reasonably possible. In some cases it is just getting another person to call in from time to time to check, or maybe using CCTV at a remote site so the service person can be watched...
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    The big difference in the electric terminology and installation regulations and practice in each country!

    I think it is for cheapness, so they can sell the same model to both old and young customers, and in the USA, etc, where metric is still a bit of a novelty.

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