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  1. E

    Angle grinder and my finger

    Of all the tools I've got, I think my angle grinder terrifies me the most.
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    Solar Panels

    It's possible to design a system for offsite recovery with millisecond failover. I wouldn't want to try though. So what does a dosing pump do if it loses connection to the main pharmacy computer? Say for example if it does the old "blue screen of death"? Or the link gets hit by the old...
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    Solar Panels

    I think possibly the interpretation is that it's not so much giving people the wrong medication, more not being able to give them the medication that they need, as it's not known what they need to be given. One would hope, of course, that this information is recorded (cached?) on each ward.
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    Solar Panels

    I believe the last line of defense is a SCRAM, which involves lowing the control rods into the reactor to absorb the neutrons and suppress the chain-reaction. That doesn't really solve the problem of decay heat and most reactors require active cooling to keep the reactor from melting even...
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    "Heckling" a scheme rep

    Probably best to nail them during the Q&A. "I note that you said x, y and z. Isn't it actually the case that...?"
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    What size SWA cable for Outdoor Electric Gate and lights

    It stands for "Yourself". I see the point which you are making, that the OP should do the work himself and not seek the help of others. This is somewhat an irreconcilable incongruity with your previous statement that the OP should get someone else to do the work. Nevertheless, that's...
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    My van

    Used to know a spark who had a 1K inverter and a 5-way CU in his van. Also had a length of wood to keep the throttle at 3k rpm while using the microwave/kettle.
  8. E

    Ceiling light wiring

    You seem to be missing a wire. I see 2x bare copper, 2x red and 1x black. Is there another black wire in there somewhere? Also, do my eyes deceive me or is that 4mm2 cable?
  9. E

    Routing Cat6 network cable in stud wall...

    If I'm ever stupid enough to renovate a house again, I have a whole catalog of cable management plans. Wifi comes with its own joyous set of problems.
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    Whats this setup? 4mm from meter!?

    I'm yet to come across a meter that I'd consider smart. I tend to have that problem with people too.
  11. E

    Routing Cat6 network cable in stud wall...

    Depends but if the void is insulated, it's going to be tricky to persuade a cable to find its way to the right place. If you can get access from above, you could try sending a cable rod down between the plasterboard and the insulation. That will take some good measuring and a jolly generous...
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    Whats this setup? 4mm from meter!?

    We can't possibly be doing that, since you have assured us that it is not possible. Therefore this is mere inaccurate speculation.
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    Whats this setup? 4mm from meter!?

    I think you've answered if perfectly. Thank you very much.
  14. E

    Whats this setup? 4mm from meter!?

    I would imagine that the payback time on the investment in batteries and inverters would make the plan uneconomical. Indeed it may dent the revenues of the power companies but balancing the load would also reduce the expenditure on generating equipment. It's not really economical to have kit...
  15. E

    Whats this setup? 4mm from meter!?

    A LW transmitter doesn't need to be located right next to the meter Only if someone has discovered it being done. So how does the radio switch work? Specifically, how does it guard against a replay attack?
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    Whats this setup? 4mm from meter!?

    How can you tell me that it has not been done? That's like when I was at school and the head of year assured me that he'd caught everyone who had played truant. The whole point of the exercise is not to be detected and so therefore the people that do it successfully do not show up on official...
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    Whats this setup? 4mm from meter!?

    There must be some mechanism by which the code is generated and connected to a meter, so it may be possible to work out what it's meant to be. Failing that, one can simply record and retransmit the whole transmission. Classic replay attack.
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    Whats this setup? 4mm from meter!?

    http://en.wikipedia.org/wiki/Radio_teleswitch That's interesting. So the economy7 rate is turned on remotely by the energy supplier? Is it just me that's thinking, hmm, small transmitter placed next to the meter, broadcasting my own economy7 signal whenever I turned on the...
  19. E

    My GardTec Alarm has turned off after a power cut

    They're very easy to use and even come with a little instruction book. Failing that, there's will be plenty of guides on the interweb. All you need to do is check the voltage across the input terminals, then across the output terminals to see if you have 240ish and 20ish volts, respectively...
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    industrial shelves supplies

    Slight problem with this howto is that it's written in the US, where they use this strange system of arbitrary measuring units than don't divide neatly. I think they black iron they are using is gas pipe. For some reason, using ferrus pipe to transport gas has fallen out of favour in the UK...
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