supplies

  1. MikeM3

    Pirate Power Supplies

    In an earlier thread that I started about floating neutral, we had quite a discussion about, "Back Feeding my Flat", from a DIY, solar set up, I, unfortunately, wouldn't do this because my system doesn't have an earth, several people who replied to my various queries, all said not to feed any...
  2. N

    Isolation of TN supplies.

    I haven't seen a lot of discussion on this subject and have questions pertaining to isolation where TN earthing is present and any peculiarites which may exist between TN-S and TNC-S. I see mostly 3 pole main switches on TN earthing systems, but do see quite a few instances where all live...
  3. B

    Steel framed units multiple PME supplies

    Multiple commercial units within the same steel frame cant each have a PME supply (from the same transformer), we have to install an earth electrode to each unit. Did anyone know that? The NICEIC tech help didnt today... Even though NPG supply a MET cant be used. A break in the neutral...
  4. J

    Two dno supplies in one premises. One is TN S the other PME.

    Is it simply a case of bonding the 2 METS with a conductor large enough to carry diverted neutral currents.
  5. SJD

    Surge protection devices for PME supplies?

    I've been installing Type 2 SPDs in consumer units for several years now, and they always come as a pair, connected across L & E, and across N & E. Typically they plug into a holder, sometimes as two separate SPDs (e.g. Hager, with separate E connections), more often now as one combined SPD...
  6. U

    Log cabin supplies

    190m run SWA underground, supplied from 3p+N 240mm sub main, each cabin total demand is 80A, worked out 35mm but volt drop is about 8%, would this be okay?
  7. O

    2 supplies to single building

    We are refurbishing an empty commercial building at the minute and I don't do commercial stuff day in day out so not entirely clued up on everything. The building is one property, central entrance hall with two big offices left and right from the hall way, the hallway though has two meter...
  8. pirate

    Anyone watched the TV documentary tonight about Heat Pumps and electricity supplies in general?

    Seriously just wanting to have a discussion on this huge issue. Clearly, there are not enough competent installers of heat pumps, so we may see some scheme whereby one can get "qualified" in a short time. I have views on this, and I have views on everything the documentary covered, but my...
  9. tee-eff-ten

    Two supplies, one cable- Regs?

    I have always been of the opinion that this was not specifically dis-allowed as long as the cable rating etc was correct and everything identified properly. To be more specific we're talking about 2x SP mcb's in a board using two cores for each circuit in a 4c cable, splitting at a junction box...
  10. L

    UPS 16amp power supplies

    Hi chaps Customer has asked me about installing a mains supply to a 16amp UPS on their server. The UPS hasn’t come with a power cord, the customer has searched Amazon for a 16Amp IEC C19 lead which comes with a 13Amp plug top, should it be supplied directly to the CU on a 16amp RCBO on a...
  11. T

    Block of flats, supplies to flats.

    Hi Guys, We are undertaking a large development and just want to get some ideas on how others would supply each unit. There will be a rising main, with potentially a rhyfield unit on each floor in each 'zone'. We have in past projects used SWA to supply each unit, with the rhyfield unit...
  12. M

    3 phase supplies for table & band saw

    Hi all, I have been asked to install individual three-phase supplies for a band saw and table saw. Having trouble figuring out the correct cable / breaker sizes required (I’m a marine electrical fitter and it’s been a long time since doing this sort of works). I currently have an Eaton...
  13. Shaun H

    What's wrong with this? It supplies an immersion heater, it's not the disconnected line & neutral.

  14. N

    Merge 2 three phase DNO supplies

    Hi all, I was wondering if you could help me a sort out the problem. Is there any way (or device) to merge 2 three phase electrical supplies? We have 3x100A from DNO and getting 3x200A additional. Is it possible to do that without involving DNO ? The power is for new build 28 flats, we have...
  15. S

    Switch mode power supplies and protection class.

    My understanding is that a SMPS does not separate, like a SELV transformer, the secondary from the primary. Therefore presumably the equipment supplied cannot be IEC protection class III. So what class is the equipment? For example a laptop with an SMPS, metal body and high resistance...
  16. A

    Laptop Power Supplies Trip RCD

    Hi, The RCD which protects my 16A ring main always "trips" when I plug/unplug a Laptop power supply. No other type of appliance causes a problem. I have 2 laptops with the external power supplies on leads which both cause this problem. I also have a similar 240v to 12v switching adaptor for a...
  17. A

    Who supplies rubber gaskets for 2 gang sockets?

    I need to fit compressible rubber or neoprene gaskets between 12 Hager 2 gang stainless steel flat sockets. The gaskets are needed because the wall has small marble mosaic tiles that have slight unevenness and grout indentations and I would like to minimise risk of water ingress. Must look...
  18. B

    Touring caravan supplies

    Anyone on here with knowledge or experience of wiring for a touring caravan/camping site, whose brains I can pick, please? I may have to design and install supplies to a C and C club certified site. That's a maximum of 5 touring caravans or motorhomes, plus 10 tents. There will be a sub main...
  19. Dan

    Are lorry drivers (or lack of) having an effect on any of your regular supplies?

    https://www.theguardian.com/business/2021/sep/04/hgv-driver-shortage-uk-firms-embark-on-the-long-road-to-plug-the-gap https://www.theguardian.com/politics/2021/aug/29/food-beer-toys-medical-kit-why-is-britain-running-out-of-everything...
  20. Deanosss

    Garden workshops/Shed supplies

    Hi All, I’m looking for a bit of advice with regards to a clients outdoor workshops. Would the diagram attached be a acceptable method of installation? One supply from the house into a DB (RCD protected Garage unit) in the first workshop then a supply from there into the second workshop with...
Best EV Chargers by Electrical2Go! The official electric vehicle charger supplier.

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Advert

Daily, weekly or monthly email

Advert

Back
Top