query

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  1. P

    Another Christmas light query

    I have a not so old filament set of lights and as much as it would be easier to bin them and buy some LED they have sentimental value and I'm not sure binning them is terribly "green". The lights state rated at 24V and 18W. I'm not sure if I have the correct power supply but it states 24V 5VA...
  2. H

    NVQ Electrotechnical Level 3 (Maintenance) evidence writing query

    Hi there, I am on my last year of my apprenticeship and have started the nvq part. Long story short I want to start writing up my evidence of work (with provided pictures of me carrying out the work), however I can't figure out a structure to follow to write out a job. If anyone is currently...
  3. SJD

    Gas meter query

    I realise the condition of the gas meter is not relevant to an EICR, but while testing at a consumer unit above the gas meter in the photo, I kept wondering about the inverted-U section of lead pipe between the meter and pipe going into the floor. The pipe is in a position where it is liable to...
  4. mrloy99

    Query; I have a panel board(mccbs) containing 100amp mccbs...

    Hello engineers. I have a query. I have a panel board(mccbs) containing 100amp mccbs supplying various "life safety DBs" lifts, water mist pumps etc.The panel board has an MCCB of 250 AMP as the main switch. It is supplied from an ATS in 120mm sq.4 core with 70mm earth.A run of 20m.The ATS is...
  5. S

    Wireless room thermostat query

    Hi guys. Just bought a Honeywell CM700 series wireless room stat/programmer with BDR91 relay box/receiver to link with Worcester Bosch 28CDi combi boiler. Using a 4-core will take L/N feed from boiler to L/N in receiver and route the Ls/T1-A and Lr/T2-B. But there are 2 L terminals in the...
  6. H

    EV Charger Installation - Cabling Query?

    Hi, We had a EV charger installed recently over the past day ie 32amp 7.2kw. In the fuse cupboard I’ve attached before and after photos. I have a 100amp fuse for the house. For the new EV board setup, should the 2 grey cables entering the EV board (10mm) be the same 25mm thickness as the...
  7. G

    Main fuse query

    Hi I’m planning on getting my house re-wired soon, the installation at the minute is an ancient old fuse board with all sorts going on in there! My main fuse is rated at 60 amp and my question is should I get the dno in to upgrade if needed to 80 or 100 amp! Am I best doing this before or after...
  8. P

    Extractor Fan Wiring Query

    Hello All, I have just purchased an extractor fan to fit in my Utility Room and trying to understand the accompanying wiring diagrams. The unit has an integral Humidistat and Timer. The 2x wiring options they show are as per drawings attached but I can't understand why, in Diag A, it shows the...
  9. M

    Inverter earthing query

    I am looking at an Edcoa 2500 inverter which produces 230v pos to neg but half of that to earth. The installation is on a boat and the boat boiler is looking for 230v to earth. Can I bond the ac neutral to earth to acieve this? Thanks
  10. A

    Bathroom extractor fan switch query

    Hi there I hope this is the right place. I am having a house rewire, and the electrician has told us that it's against regulations to have a specific switch for the bathroom extractor fan. It has an isolator switch, and all switches are outside the bathroom, but at the moment his configuration...
  11. DT1991

    Can anyone help with a fire alarm query.

    Can anyone assist me in finding out if all cables involved with a fire alarm system must be FP or similar. By fire alarm I mean sounders, call points, door holders etc. Thanks.
  12. HoverSPRX

    Max Demand/Diversity Query

    Hello All, Iv been asked to pick up the remedials on someone else's EICR that was done last year on a school for Deaf Children. One of the items listed on the report is the conductors leading to the sub mains from the main panel are undersized. I popped the cover off to have a look and sure...
  13. E

    Earthing System Query

    Hi, just a quick question... I’m at the stage now where I’m being pretty nosey at other people’s consumer units/supply set ups etc to further improve my understanding and recognition of the different earthing systems found in domestic properties. The image below was taken at a member of my...
  14. B

    Query about 12 & 24 hour supply

    Hi I'm new here . I have a simple question please. At work we have *12 hour supply* and *24 hour supply* labels on some of the distribution boards. What is meant by this please???
  15. I

    Ryefield Query

    Hi all, Been asked today to quote for installing a Ryefield board which will in turn supply 1 x shop with 3 phase power and also 3 x flats with single phase power. My question is... Would the DNO connect directly into the Ryefield board or will they expect some form of isolation which I will...
  16. M

    Emergency Lighting query

    It's been a while since I tested emergency lights and I just wanted to clarify something. If the lights not working and the green LED light is off, is this an inverter and if the LED light is off and the lights still not working is this a dead battery?
  17. M

    House supply questions

    Hi all, Got a bit of a query with my mains supply where it enters the house. Its in an empty room that i'd like to either fit a bathroom in (as in my picture) or a toilet and wash basin. Would I need to have this DNO fuse etc moved or can it be boxed in with a water sealed access hatch? All I've...
  18. BeeJay2

    Smart metre LED's query.

    Hello all, My present duel fuel supplier, Bulb, doesn't use the smart meters installed by my previous supplier, British Gas. The 3 LED's on a separate unit linked to the electric meter are, top, (WAN) Green, on permanently, middle, (HAN) Red continuous flashing & bottom, (PWR) Green which I...
  19. J

    Rather Low R1+R2 Query

    Quick query I’m hoping someone can clear up. Im just looking at an example of a schedule of test results in a book I’m studying and I’ve come across an example I don’t understand. A lighting circuit protected by a 6amp 60898 Type C (Ref Method 100) using 1.5/1.0 T&E is measuring out R1+R2 at...
  20. I

    Another SPD question & groupin query

    In a domestic situation where dwelling would be used for air b & b would it still be classed as single dwelling? Would it be classed a comericial dwelling as people staying there and paying , also would there be requirement for surge protection , I Would assume so , as items in property value...
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