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  1. ericmark

    Hive installation multizone question

    Maybe I am missing some thing? But why does it need two thermostats/hubs? There are two basic methods to split a home into zones, one is hard wired zone valves, the other is the thermostatic radiator valve (TRV) with a motorised head, both are motorised valves, but the TRV type is analogue so...
  2. ericmark

    Converting Old Fluorescent fixture to LED

    The tube pins are wired in series with the starter between the two ends, so just the ballast shorted out using a single block connector. Although the power only goes to one end of the LED tube, the other end is a short circuit, so unless wired in series if the tube is fitted wrong way around it...
  3. ericmark

    Wood stove boiler + gas combi

    I also looked into it, and have seen it working in brother-in-laws old house however when he moved I looked into retro fitting same system, and the cost was silly. The main problem with solid fuel is one can't simply switch it off. So it must be able to work even with no electric at least...
  4. ericmark

    McAfee virus how to get rid if it?

    Spoke too soon, found it shown corner here by clicking close down it allows the removal of PC_App_Store folder in the C:\Users\User\AppData\Local folder, but still shows as being installed with the apps and an attempt to delete comes up with and says I have a virus, all seems to work OK for a...
  5. ericmark

    What size cable from solar panels / battery to immersion?

    I am still learning after solar panels fitted in Autumn. The inverters are not all the same, I had to have an earth rod installed for when the unit is island with not connection to grid, and the unit auto connects neutral to earth when that happens. And it states that type AC RCD's can be used...
  6. ericmark

    Split-load Switch / RCD flipping down repeatedly

    I use a clamp on ammeter to measure the earth leakage, seen here showing 8 mA, the accepted limit for a RCD is 1/3 of the RCD rating, so 9 mA is the limit. I actually have 14 RCBO's so well within the limit, but the problem in the past has been when RCD's were fitted often no one tested back...
  7. ericmark

    What size cable from solar panels / battery to immersion?

    I would assume you are looking at iboost+ which uses the existing cables to your immersion heater and has a wireless connection to the CT coil which clips onto your incoming supply and is battery powered. I have an iboost+ fitted, not sure if really worth the money, as only works in summer. As...
  8. ericmark

    McAfee virus how to get rid if it?

    Thank you, after repeated attempts finally got it to stop coming up. Although still shows as being there.
  9. ericmark

    Changing and old 2 gang light switch

    I have called that school boy wiring, the connector block is not required if wired like this and if the coms are correct, it does not matter about the other two wires which way around. And three wire wiring is like wiring the enter, wait, busy lights outside an office, and I have seen flick...
  10. ericmark

    Upstairs/downstairs switch issue

    I know the wiring shown is possible, so only three wires to each switch, but never seen it done before. Since there is a connection in the ceiling rose, the fault could be there. Normally we see 5 wires to one of the two way switches, so wired like this so the com wire can't change colour, with...
  11. ericmark

    How often is smart meter app updated?

    My app last reading is 26th Feb, now 16th March which seems a long time. The in home display shows what is used each day, but no option to look back, so ever since changing tariff I have lost the ability to compare use. I am sure not loosing money, but at this early stage really need to work...
  12. ericmark

    Honeywell to Drayton Wiser - CH wiring.

    There are two micro switches in most three port valves. And when one fails CH will not indicate but will continue running if DHW has been running first. It will also often run when the bleed arm on the three port valve has been latched across. My daughter had a faulty valve from moving into...
  13. ericmark

    Honeywell to Drayton Wiser - CH wiring.

    I will guess Y Plan and the problem is a stuck micro switch in the motorised valve.
  14. ericmark

    IP65 box / wall output

    I have signs that there were out door electrics around my house, I would not dream of re-using them. The question is why disconnected? Had it with mothers house the cowboys putting a new roof on the garage clearly did something and the cable developed a short circuit inside, but no viable...
  15. ericmark

    Why don't they......

    So 2.566 MJ then using the metric system, nearly a horse power, 0.952124 Horse power. Was that 550 foot/pounds. This is the problem being an old fogy, I was taught to use LSD and that not a drug.
  16. ericmark

    1.5" fluorescent tube fittings

    I do wonder how long we will be able to get fluorescent tubes for, it seems EU are breaking their own rules about equipment being maintainable for 7 years from point of sale, so fluorescent fittings should have been removed from sale 7 years before the tubes were withdrawn. As to question I...
  17. ericmark

    EV are they worth it?

    It was this Harry's farm video, it is clearly not there yet, but also clear that battery powered engineering plant will not work either, I agree the pressures involved are rather high, but getting an electric refuelling bowser like the hydrogen one shown, just can see it happening.
  18. ericmark

    Why don't they......

    We measure energy as Joules, however the numbers become rather large, so watt is a Joule per second, so a Watt hour is 60 seconds x 60 minutes 3600 larger unit to the Joule, so we have another unit 3600 times bigger, clearly neither having any connection to the metric system which means we have...
  19. ericmark

    EV are they worth it?

    Exactly places where loads of electric to turn into hydrogen. Which can be transported far easier than electric and can be transferred far faster than using lithium.
  20. ericmark

    EV are they worth it?

    The video was JCB and the fuel bowser was part of package. And clearly not cars. They pointed out a diesel and petrol engine can't really be converted to hydrogen it would be whole engine replacement. They are low revving and blown to get the excess air needed to avoid nox. But it was clear...
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