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  1. EricMark

    UK Immersion heater timer

    My system did not have motorised valves, it had two pumps, clearly some one thought if one switches one pump on it would heat flat, other pump on it would heat main house, and no pump on thermo syphon would heat DHW. However using one pump resulted in the flow through other system going in...
  2. EricMark

    Economy 7 confusion

    Economy 7 is a tariff not a system, there are many ways it can work. In the beginning we had White meters, and every item powered by the off-peak was connected to a different fuse box, (no consumer units back then) and it mean that items like washing machines, tumble driers, and dishwashers...
  3. EricMark

    UK Immersion heater timer

    Just to add my two pennies worth, I can heat whole tank with oil, or top of tank only with electric, in my case from solar panels. Using the oil, I would heat the tank 4 times a week for 20 minutes a time in the summer, and this would give me hot water, not super hot, every day, the tank would...
  4. EricMark

    Best way to maximise export of generated electricity?

    Now had panels for over a year, and still no payment for export, made application to British Gas on their forms, but they say wrong format, it will cost £75 to move from British Gas, and we are told Scottish Power is also a problem getting the application accepted. Octopus seems are better...
  5. EricMark

    UK MCB's vs Cartridge fuses

    This is the power used by my chest freezer, on average so even a 1 amp fuse should be OK, but you can see the start amps, and one has to question what the peak really is, and not all freezers are the same, my upright freezers with inverter drives have no where near that start amps, and since...
  6. 1717891316968.png

    1717891316968.png

    • EricMark
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    • Category: Electrical Videos
  7. 1717890430009.png

    1717890430009.png

    • EricMark
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    • Comments: 0
    • Category: Electrical Videos
  8. 1717890548934.png

    1717890548934.png

    • EricMark
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    • Comments: 0
    • Category: Electrical Videos
  9. EricMark

    UK Re using a 10mm cable to provide a new ring

    A twin cooker connection unit can easily change 10 mm to two 2.5 mm cables, the consideration has to be overload near the cooker connection unit, in same way as with sockets close to the consumer unit.
  10. EricMark

    Eicr standards

    There is a good IET paper on this, and the myths clearly even if in 1900 we were allowed open knife switches, we can't use them now. But as to using the regulations valid at the time, pre 1966 we had "Lighting fittings using filament lamps installed" and since we no longer have filament lamps...
  11. EricMark

    An odd question, but what is the time from radio 4? Looking at duel tariffs and when they change high to low rate?

    The problem is not GMT (UTC) or BST (DST) it is the not knowing what the times are, I was told to start with midnight to 8 am, then sorry no it's 5 am and now sorry it's 1 am to 6 am so for me easy set to charge 1 am to 5 am so when clocks change with my software, it is still within the cheap...
  12. 1714898889376.png

    1714898889376.png

    • EricMark
    • Media item
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    • Category: Professional Electrician
  13. EricMark

    An odd question, but what is the time from radio 4? Looking at duel tariffs and when they change high to low rate?

    I have read all I can find about radio 4 and tele switching, but can't find if this changes when our clocks change. It all started when I decided to get a smart meter fitted, and once fitted may as well get duel rate and recharge my 3.2 kWh batteries over night as well as using solar, this seems...
  14. EricMark

    Car battery losing its charge

    I have found it takes a long time to fully recharge a lead acid battery be it flooded, or AGM (VRLA) it takes time to convert the sulphur back into sulphuric acid. `The first time I was able to experiment with time was on finding two small 7 Ah batteries from a stair lift, I knew the history...
  15. EricMark

    Just how smart are "Smart Meters"?

    Interesting what you say, I have allowed with my system for the change to be half hour out, so start charging at 0:30 and stop at 7:30 but night rate should be I am told 0 to 8. My heating is oil, so yesterday my use was which is normally less than £3 a day total. It does not seem I have any...
  16. Power used 6th March as example.jpg

    Power used 6th March as example.jpg

    • EricMark
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    • Comments: 0
    • Category: Electrical Videos
  17. EricMark

    Steel framed units multiple PME supplies

    Thank you, I had not considered the higher current in the good PEN, I must look as the building I work in has 3 or 4 supplies, there were separate units, but now are all combined and the cost of having supplies removed exceeds the cost of the standing change by a huge amount, so they were left...
  18. EricMark

    UK Smart heating thermostat

    The plate you show seems to show it does domestic hot water (DHW) as well as central heating (CH) in the main when that is the case the thermostat activated a valve and in turn the valve runs the central heating. By the use of relays nearly any thermostat can work nearly any on/off boiler...
  19. EricMark

    2 x Main Switches in on consumer unit

    I was told that for years, however my house has a few, the DC isolators, the UPS isolator, the DNO isolator etc. And at work one building has at least three DNO supplies, maybe four.
  20. EricMark

    Daylight saving time

    I have to use UTC even when DST is activated, for some things. (Not called GMT any more as the observatory has moved, it is called unified time constant [UTC]) it is the only way to work internationally. The problem is Union agreements and the like, I know we all wanted an early morning start...

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