supplies | Page 6

supplies

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  1. Midwest

    PME supplies to emote buildings

    I've previously posted about doing a CU replacement for my assessment. I will also have to re-supply a small garage CU (20a radial + 6a lighting), which has been answer for me, thank you. The property has a TN-C-S supply, which will be fed with new 25mm tails, 16mm EC. The garage is link...
  2. B

    One boiler, two y plans, two power supplies

    Hi, Have just deleted an epic explanation of my problem because by the time I reread it it made no sense to me. Instead will prepare for the barrage of "its simply you fool" by asking this question. How do you wire two separate properties with their own separate power supplies running there...
  3. M

    communal testing

    Hi all Soon i will be testing communal installations, which will be corridors, lounge areas, kitchens etc, is done alot of testing on domestic installs but none on communal, i know i will be up against 3 phase incomer supplys, ryefield db's, emergency lighting etc, can someone give me a...
  4. S

    2 supplies from same dis board to secound dis board???

    Hi all been a while since i been on here but been asked to connect up a couple of big ups's for a server room. Easy enough but problem is they want them to be powered by 2 x 3 phase circuits from another dis board ie 2 mcb's and 2 x swa feeds, I have asked them to use seperate boards in the...
  5. B

    100ma S type Rcd (Time delayed)

    Anyone give me a rough price for the above, Never needed one for a while. Wholesaler doesnt keep it as a stock item so waiting a call..
  6. C

    3 phase Incoming Supplies

    Hi, With reference to the main incoming supplies on mainly 3 phase and the requirement to fill in the Type of supply & the fuse rating for the supply, sometimes together with the Main switch details - I often have dificulty with these as the majority of times the supply cable and incoming fuses...
  7. S

    US 220 volt supplies

    Hi, new to the site and not an electrician. I am planning to move to the USA in a year or so. I just had a question about using UK 240V 50Hz tools on a US 220V 60Hz supply...basically is this possible? Is there any way I can avoid selling all my UK electrical tools and having to buy new ones...
  8. La Poste

    Switch mode power supplies??

    Greetings. I know that switch mode power supplies can create radio interference and also neutral harmonic currents but does anyone know why? Does anyone know why the components inside the power supplies can cause radio interference and/or neutral harmonics? Thanks very much.
  9. 0

    Electrical supplies over long distance

    Hello there. I have been asked to look at a new supply, 240 volt to a stable block. Problem being is distance likely to be between 150-175 metres. Volt drop gonna be a problem. DNO quoted £30k to run new cable from sub. The stable block includes a kitchen, toilets, office so they were looking at...
  10. B

    sub DB supplies

    hi all just a quick question when on a site i came acreoss a sub db (single phse 4 way)(30 mts from main db) being fed via a 10mm t&e i was unsure whether or not to report it to the client as unsuitable cable size and advise to upgrade, the sub db had 4x 30 amp supplies please advise
  11. Guitarist

    Supplies to outbuilding CU's

    Do you guys think that the majority of electricians actually bother using the adiabatic equation to decide whether the cpc of a T&E cable is adequate when supplying a CU in a garage/shed, or do most people just size the cable based on CCC and voltdrop? I come across a lot of T&E strung between...
  12. A

    2 way Isolator For GSHP immersion with 2 supplies and 1 load

    I am going to fit a 3 phase 6kw immersion heater in a 500litre cylinder. this forms part of a 30kw GSHP system. The immersion is required as top up when the GSHP is not enough to generate enough hot water and the immersion kicks in via GSHP control to lift the temp further. It is also required...
  13. T

    Experience with the DNO?

    Hi people. My first post on this forum - many thanks in advance for the commitment to it, hopefully I may be able to contribute as well. For anyone who is interested, I was an Electrical Maintenance Engineer for 10 years at BAE Systems, doing anything and everything - then i chose a completely...
  14. U

    New electricity Supplies

    Has anybody any experience of using a utilities company other than the DNO to install new electricity supplies to premises as a customer is wanting to get competitive quotes for some new supplies
  15. I

    3 Phase / Single Meter - change to one communial meter, 4 sub meters, 4 flat supplies

    I'm doing the design work for a job. anyone done something like this before ? ANY IDEAS GRATEFULLY RECIEVED Supply is TP&N. It has a single Meter feeding a bunch of stuff and a few fuse boards (next to the meter). The customer is converting the house into 4 flats each with it's own meter...
  16. B

    Certification for generator supplies

    Hi a friend of mine has been asked to provide a certificate for the generator supplying a db for external fixed equipment for a period of approx 6 weeks I'm unsure what advice to give please help thanks
  17. UKMeterman

    Testing of 12VDC power supplies after repair

    Hi, If I repair say a 12VDC SELV floating mains power supply in a metal class 1 box what tests should be applied after a repair. I am thinking earthbond 100mA or 25A and IR test L+N to E with output also connected to E. What voltage should be used for the IR tests LN to E 500V DC or 1.4kV AC...
  18. R

    periodic testing and the new condition report

    good morning everyone , as some of you may know i`m a school sparkie , 24 years man n boy , full apprenticeship , jib reg , 2391 , 17th , nvq , right my question , i`ve updated my powersuite lite so i now have the new contion reports , that states its for domestic and similar premises with up to...
  19. G

    Temporary supplies

    What is the maximun period between certification of temorary supplies and what would i do if i found a fault with the equipment durring the certification period? Cheers
  20. cliffed

    potacabins supplies

    Morn chaps,i know there been a lot of discussion on temp/permanent supplies 2 portacabins,jus done a pir test on a couple,they r supplied wiv 6mm 3c swa,of tncs supply,each cabin as its own rcd db.My problem is the main bonding conductor sizes, the main intake is a biggy,1600 amps & the main...

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