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  1. Edtwozeronine

    Correct symbols for physics notation

    Our tutor wants us to use what looks like a Beta symbol for Tesla's, but in our official notes from city and guilds they want us to use a capital B. Another thing that I'm having trouble with is the proportional to symbol. What does it mean mathematically speaking? Is there a button for...
  2. A

    Old Double Insulated Appliances

    I am looking at a receiver/amplifier that was manufactured in the mid 1970s. It has a very solid all metal case. It is powered by a mains lead that has only two conductors, active and neutral. It does not have any Class II notation or symbol anywhere on the case. I am wondering whether the...
  3. G

    DXF Symbol Library

    Hello i'm a mechanical engineer and i used to work with the 2D-Cad System Draftsight. Now i'd like to draw some circuits, and so i need a symbol library for draftsight or autocad in the DXF format. Does anybody now some free oder cheap symbol library?
  4. Lee Gold

    Schematic symbol help

    I need help with symbols and drawing reading, I can't read a drawing at all and had a look on google for symbols but can't find the best site, can someone point me in the right direction on how to read drawings and the symbols I need them mainly schematic industrial
  5. i=p/u

    Led

    Yo elec tec bulbs and couplers. anyone done and jobs recently in fitting out shops with leds , do you think a 1200 x 300 led panel would replace a 2 x 35w t5 ? how accurate is the data sheets to actual installing them? if you can add to this post , be my guest . Ty from a well trained...
  6. M

    What's this symbol

    Hi all, hopefully you can see the image of Electronic IR sensor switch on it is a circle with a X in it two lines trailing from it with two dots at the end I understand they may be (lamp or directional) symbol can someone please clarify... I supplied it to a colleague to power a low voltage...
  7. matt1386

    Trainee - Advice please

    Hi all, sorry if this is in the wrong section, wasnt too sure where to post it Basically ive started college a few weeks late so im having to play catch up at home to get to where the rest of the class are at Ive come across a question on my work sheet which im not sure how to work out and...
  8. driverman

    MCB breaker markings reset or thrown away

    Hi Guys, Hopefully a quick question.......Breakers are marked by the manufacture symbol if they can be reset / reused or thrown away after a fault current. Where in BGB or OSG can I find the symbols? I've been looking. I'm sure they are in there somewhere. Thanks
  9. S

    Megger LCB2500/2

    I recall biff55 really rating his that he got off ebay, fair play. I got one years ago, seemed fine for a while, but then it wouldn't make loop measurements, kept coming up with the 'Noise' symbol and take an eternity to give a reading, if at all, which was basically a random number. I've got a...
  10. M

    megger 1552 sine wave symbol

    Don't know if any one can help here. Today whilst doing a Zs test my megger produced a weird symbol that looked a bit like a sine wave with a vertical line dissecting it at the top. It have the correct Zs result at the same time. But id never seen the symbol before Can't find anything about it...
  11. R

    Dead Testing Results

    Hello all, i have some dead testing to do, i just have a new megger Robin KMP3075DL and when using it in Insulation test mode (500v - 20Mohm) on 2.5 twin + earth as practice, i test between LINE and CPC and get the reading from the display (up arrow 1) so on my schedule of tests sheets what...
  12. D

    Symbol

    Can anyone tell me what this symbol represents? I can't find it in BS 7671 or the OSG. Its like a single socket but mounted to one side of a rectangular box. It's situated in the kitchen of a floor plan for a domestic dwelling. Also, can someone advise why certain symbols (like this) are in...
  13. Dic Penderyn

    Cable spec for a factory cooler!

    Howz it Lads & Ladettes! There's a huge project afoot! No cable spec yet! Would anyone have a incline to what cable size might be required for the following Cooler for a Diary Factory? · Model RTAC 250 HE · Power: 628 kW · Electrcial power unity: 253 kW · Power...
  14. mattyevz

    Price rewire 3 bed (customer to chase)

    Hi guys just woundering a fair price for the following 3 bed rewire (customer to chase walls) was thinking £2400? thanks guys Note: all accessories in standard plastic unless otherwise stated Electrical Supply · fit 17th edition consumer unit(customer supplied) ·...
  15. F

    Laptop adapter with grounded plug and double insulation symbol - okey? Second try

    Hi I don't know what happened but my first thread comes up as invalid? Because of to many pictures? Anyways, my question stands, and I hope someone can answer me, it would be much appreciated. Is it any drawbacks of having a laptop adapter with both ground and double insulation? I have never...
  16. F

    Laptop adapter with grounded plug and double insulation symbol - okey?

    Hi I recently bought an unoriginal adapter that came with a grounded plug, I noticed that the sticker also had the symbol for double insulation. I have never seen this before, is it ok? Here are som pictures:
  17. I

    Symbol for energy efficient lampholder

    Hi All Is there a specific symbol for an energy efficient lampholder? I'm currently doing the 2391-20 and none of the symbols on the Legend supplied show such a symbol! Many Thanks
  18. E

    how will the JIB grade me?

    heres the list of quals i have: · City&Guilds 2391-10 Inspection, Testing and Certification of Electrical Installations · City&Guilds 2382-10 17th Edition Wiring Regulations · City&Guilds 2377-11 Management of Electrical Equipment Maintenance...
  19. S

    GS Solar UK - Thin film PV looking to for partners.

    Dear Forum members I would like today to introduce GS-Solar (UK) Company Ltd, amanufacturer of the revolutionary “Thin film” Solar PV modules. Our mothercompany, GS-Solar (China), is one of the largest producers of thin film solarmodules in the world; using our proprietary manufacturing...
  20. A

    Service Fuse Removal: Latest News from ESC

    (What else would I do with my Sunday afternoon.... :rolleyes:) Most of you will already have read this in this month's Switched On mag from the Electricity Safety Council, but for those who haven't, this is how the discussions between suppliers' and contractors' representatives are going...

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