systems

  1. P

    danfoss 3020p replacement

    anyone replaced a danfoss 3020p programmer? ive been given a Honeywell st9400a to change to, only worried about the water only and water and heating settings, will the new programmer still work on heating only
  2. Lou

    Scott Clarke Electrical

    Scott Clark Electrical is your local electrician, based in North Newbald but covering the whole of East Riding, we offer a professional service from many years experience. We are NAPIT Part P approved and are members of the Trust Mark, for reassurance of the quality of our advice and...
  3. T

    fire systems

    hi all, just wondering as it's quite confusing as to what fore system (grade) are required for each property. now .... we know that in domestic properties they require grade D in the hall ways and landing, all interlinked with battery back up. now what about in a house turned in to two...
  4. L

    Earthing Systems

    Can anyone confirm this Earthing system please. 11KVA line to transformer. Off the transformer line to 1 cable to house Off other side of transformer to earth rod and 2nd line to house At house outside. Transfers to DNO equivalent of 1 core swa with core connected to line and armour connected...
  5. Energetic

    VAT rating on batteries and off grid.

    Been out of the loop for a bit, am I right in assuming that batteries for a domestic self consumption situation are 5%? Also for off grid systems? Cheers E
  6. M

    DALI Control systems - Do i need different drivers?

    I have a project in a hotel that has a DALI control system We are supplying LED downlights that are dimmable on the DALI protocol but they also want other lighting ground lights and wall lights that do not need to be dimmed. Question is will they still work on the standard LED drivers or do...
    • mungo2007
    • Thread
    • control dali different drivers systems
    • Replies: 3
    • Forum: Lighting Forum
  7. 1

    JIB Electrotechnical Certification Scheme (ECS) Jib Mcas Qualification

    Has anyone done the JIB MCAS (mature candidate assessment scheme) ? I have been in the electrical trade a good few years and wanted to finish off my training so I can get JIB'd. Been sent the knowledge unit from my training provider and hardly any of it is actually electrical related more H&S...
  8. S

    Earthing Systems And Explanations.

    Sintra submitted a new resource: Earthing - Earthing Read more about this resource...
  9. D

    Testing of DALI Systems

    Could anyone give me some pointers on testing of DALI system,
  10. D

    TT systems and RCBO's

    Why are standard single pole RCBO's not advised for a TT system? Sure I've seen this somewhere....something to do with not disconnecting the N with a N-E fault potentially allowing a fault current to continue to divert to earth from the neutral.. But then a SP RCBO, or MCB on a TN system would...
    • Deleted member 9648
    • Thread
    • arial neutral rcbo rcbo's system systems
    • Replies: 17
    • Forum: UK Electrical Forum
  11. D

    Fault Finding help

    Hi, I'm being assessed for fault finding as part of my NVQ tomorrow and have just had a bit of a 'what the hell am I'm doing' moment! I'm building the fault in. It will be a loose neutral touching an earthed metal back box in a socket on a ring main, causing the RCD to trip. My plan of attack...
    • danb86
    • Thread
    • circuit equipment fault fault finding finding help neutral systems
    • Replies: 9
    • Forum: UK Electrical Forum
  12. J

    underfloor heating on economy 7

    Hello all, Went to look at a job this week at a 1960s property. When the house was originally built electric heating elements were installed within the screed and have been operating happily on economy 7 ever since and client is happy with it. Just wondering if anyone knows of this still being...
    • jedisparks
    • Thread
    • economy economy 7 heating screed systems these underfloor underfloor heating
    • Replies: 4
    • Forum: UK Electrical Forum
  13. M

    MCS 012 fire rating in roof systems

    Hi All reading the guide it mentions performance of different panels & how they react, Maybe with all the guidelines & standards we have to adopt they should have had more stringent standards on the panels in the first place & then they would not need the requirement. Evidence has emerged...
  14. G

    31st March deadline for FIT applications for systems with MCS cert issued <16th Jan

    Leeds Solar have just become aware that on 10th March DECC slipped in a Statutory Instrument that takes effect today (31st March 2016) that results in the following urgent issue. All existing renewable energy installations with an MCS certificate issued before 15th January 2016 must submit...
  15. A

    TT Systems

    Hi quick question I have to change a consumer unit out. It is a TT supply system. All breakers will be 61009. I have spoken to my part P tech department and they say that I still need a 100A 100mA S type main switch up front. Another guy says NO as the breakers are all 30mA controls. The first...
  16. D

    Pet sensitive wireless burglar alarm

    I need to put an alarm in my house and can't really be arsed to install a hard wired one. I have have two cats so need a pet sensitive one. Does anybody have any recommendations? If push comes to shove then I will put in a hard wired one if someone knows of one that's really good. All help...
  17. H

    Alarm Systems

    I fancy reading a little on alarm systems - anyone recommend a good book that will teach me the basics?
  18. The Solar King

    Removal of Solar Thermal from the RHI

    This has been rumbling on for several months. DECC finally announced a consultation yesterday which can be found here: https://www.gov.uk/government/consultations/the-renewable-heat-incentive-a-reformed-and-refocused-scheme Biomass will also take a hit. The strategic thinking behind this is...
  19. A

    Wiring systems in office environment

    Hello! This is my first thread in this section of the forums. I'm relatively stuck with my design assignment, I was given drawings of a highways depot and I have to design the whole installation, show wiring systems, divide the installation into final circuits and do all the calcs. I'm okay...
  20. Energetic

    Two identical systems, one 20% down...

    Morning all, Came across an interesting one yesterday. On a farm, two P1 27.6kw inverters with identical arrays that used to have the same output, since nov2015 one is running about 20% down as i witnessed. Immediate assumption was that a string was down but string voltages tested out fine, 6...
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