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    Replacement lid/cover for how water cylinder - advice please

    Thanks for the advice but don't worry, I didn't buy this particular float value - this was just the only picture I could find that had the plastic thing in it. The plumber's merchant didn't think they'd be able to get me this just on its own so I've had to buy a brass float valve to get one...
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    extraneous conductive part

    OK - I take your point :) Seems like my tuition wasn't up to scratch... One point I will say in my favour is that whoever used to write the C&G 16th Ed papers didn't understand this concept either - this was the only time that I remember questions about exposed/extraneous parts being asked and I...
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    New garage installation

    Just to add a (small) point - if you're thinking about putting electric doors on the garage make sure that the isolator is in the house and *not* the garage.
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    extraneous conductive part

    As soon as you bond anything metal then it will automatically be at whatever potential the earthing system is at, correct? I think the true definition of "extraneous conductive part" is anything that isn't part of the installation that is capable of conducting an electric current (even if only...
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    Replacement lid/cover for how water cylinder - advice please

    Quick update - cover is now on order and have just bought a new float valve that has the plastic 'bridge' in it that's needed to redirect the water - I haven't got a digital camera handy but the image below shows what it looks like (still no idea what this item is really called though)...
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    extraneous conductive part

    My lecturer told me about some fad (a few years ago mind) about metal window frames being bonded - logic prevailed when people realised that the likelihood of someone touching a window frame and a socket/live appliance at the same time was fairly minimal (especially given the need for both to be...
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    cable derating

    It would make sense to derate bunched cables because the inner ones in a bundle would be more exposed to thermal effects than the outer ones, right? By being bunched, the reference method for the inner cables is (in essence) different to the outer ones. As an example, if cables are classified...
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    Replacement lid/cover for how water cylinder - advice please

    It's not really whether I like plumbing or not, it's whether I want the responsibility of doing the job properly ;) I like electricity better than water (easier to switch off) but I have a lot of respect for what you guys are doing. As long as I can buy something and fit it (without tools or...
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    Replacement lid/cover for how water cylinder - advice please

    Thanks for those speedy responses! Looking at the picture that's been posted, it's really only looked like one cylinder rather than two stacked ones (it wasn't very tall either). It would have been useful if I could've got a good look in the cylinder but there was no humanly possible way...
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    Replacement lid/cover for how water cylinder - advice please

    Hope someone can help me with this please: Wearing my electrician's hat, earlier on today I went to replace an immersion heater element that had burnt out. The cylinder was already drained when I got there and the element is an 11inch type that fits sideways into the bottom of the cylinder...
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    Basic Question.

    My experience is electrical and not plumbing but here goes: Do you know what the boiler's rated at? As a rough guide, a 3kW device (drawing just under 13A) should really have a heat-resistant 2.5mm cable to be safe. I don't know whether this is standard practice but it's usually recommended...
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