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  1. M

    Distance between meter and cut out

    My main cut out and meter is in a small cupboard above a kitchen sink. The CU is in the utility room next door. The tails are approx 2 meters long. The DNO has said there is not enough room for a smart meter in the small cupboard. Is it allowable to fit the smart meter next to the CU in the...
  2. K

    IEC 61439-1 - Relationship between prospective fault current and diameter of copper wire

    Hi, I am currently reading through the standard IEC 61439-1 - Low-voltage swtichgear and controlgear assemblies - Part 1: General rules, and on Table 14 it is stated the "Relationship between prospective fault current and diameter of copper wire" (see picture attached). I don't understand why...
  3. B

    Overhead cables between buildings on domestic property

    Hi all. I've recently bought a bungalow. It currently has a armoured cable between the house and garage which spans less than 1 meter. The height of the cable is 2.3m and directly under this is the side gate to access the back of the property. It's old wiring so will be replaced, but I've had...
  4. V

    EICR code for lack of discrimination between RCD's

    Hi all Called to do an EICR on a property 4 studio flats / bedsits within a single house. The t&e sub main to each flat runs within the fabric of the building and has a 30mA RCD at its distribution point...assuming this was an add on to the original installation. Each flat has a RCD main...
  5. M

    Ground wire(s) in multiple conduits between sub panel and j-box

    At long last my wife is getting her new kitchen and the contractor will be running 10 or so new circuits from a new sub panel. The sub panel, unfortunately, is on an outside wall around 35 feet from the kitchen. The wiring will have to go down the wall, into the crawlspace under the house, and...
  6. RF Solutions Ltd

    Install new heating systems? Ever had a missing cable run between a boiler and a pump?

    Do you install new heating systems? Ever had a missing cable run between a boiler and a pump? Using MAINSLINK - the pump overrun solution - you can avoid expensive cable runs when cables are missing between a boiler and a pump. When the MAINSLINK by the boiler has 230Vac live input, this...
  7. S

    Why did test lamps show 0V between live side and dead side?

    I removed a fuse and before reinserting did the following tests using test lamps. Live side - Neutral = 230V, Dead side - Neutral = 0V, Live side - Dead side = 0V. I then used a multimeter to check these results as I was expecting a potential difference of 230V between Supply side and dead side...
  8. sldz1200

    Differences between fluke 1663

    Hello, I don't know if I'm in the right place for this publication, I apologize first of all. I did a search, but I didn't find anything.... Does anyone know the difference between these two FLUKE 1663 models, where one comes with the RCD test selector in yellow and the other in white? What is...
  9. A

    230v between N+E and 0v between L+E

    Hi all, I was called out earlier today to a house where a plumber was fitting a new mains electrics shower. He wanted to know if the existing cable was of a suitable size. I am a recently registered electrical contactor, however I hadn't come across this issue before. The cable was a 6sq pvc...
  10. MrIdo5

    LED lights jumping between modes

    Hi Guys, I love colorful LED light strings. I've been wanting to hand some around the house and finally got around to it. I purchased a few LED light strings that seemed high quality on the web and hung them around the house. The lights worked well at first, however they soon began...
  11. K

    difference between semi flush and flush service panels?

    I am upgrading an old 100A semi flush outdoor overhead panel to 200A solar ready, panel. Was looking at Square D SC2040M200PF, but this appears to be designed for bottom feed- with option for top feed. Does not appear ideal, and my installer says might be a real PITA. I am not seeing many...
  12. J

    Difference between FSU and 3 pin plug, both with 5 amp fuse for LED downlights?

    Is there an obvious reason why I can't just fit a plug onto my LED soffit downlights, fitted with a 5amp fuse and plug it into a socket rather than install a 5amp fsu? I'm fine with the plug being permanently plugged in as the socket gets no use anyhow. TIA
  13. jasonvr

    Advice on conflict between generator interlock kit and subpanel requirements (Siemens Panel)

    I recently had my 50yr old 100A main panel replaced with a 200A Siemens panel (MC2040B1200EFC). It is the incarnation with the 200A main breaker at the bottom (earlier versions were center fed which would have alleviated my problem). At the same time I had the electrician add a 50A inlet for a...
  14. G

    What is this small voltage between spa water and natural earth ground?

    I've noticed a strange voltage reading between the water in my spa and natural earth ground. The reading varies between .35VAC and .7VAC. My wife noticed a small shock from the water after inserting her finger in the spa while standing outside the spa. I tested the GFCI and it is working...
  15. I

    Distributing kitchen appliances between circuits

    We're renovating our kitchen, and I have parts of the wall open and can rewire circuits right now if needed. We currently have three 20A circuits serving the kitchen, as follows: *Circuit 1: fridge, microwave, toaster, outlets. *Circuit 2: disposal, beverage cooler (5 cu. ft. mini fridge)...
  16. T

    Where can I find a wiring diagram for 3 way switches to control multiple outlets between them.

    I am wiring 2 outlets in the ceiling to control 2 plug-in florescent shop lights in my garage. The 3 ways are at each side of the garage at the 2 entry doors. The way I have it wired right now, both lights come on at either switch but turn off if either is unplugged. I would like both outlets...
  17. B

    Difference between Hager RCB's

    What is the difference between a Hager MT132 and MTN132 circuit breaker? (apart from the fact that one has an 'N' on it and the other doesn't). I need to fit (or get fitted if I can ever get a lecky) an MT132. Thanks Brian
  18. M

    Difference between ON and OFF intervention in the tsd of an ACB trip module

    Hi All, I'm trying to learn about discrimination and I came accross the LSIG characteristics of an Air Circuit Breaker. Howecerm there is something I really cannot understand about the Tsd. What's the difference between ON and OFF in the intervention? Thank you in advance
  19. UnderstandingElectrics

    TN-C-S supply, shocks from earthed sink, latest test from landlord 200Mohm resistance between E/N

    TN-C-S supply, shocks/tingles from earthed sink. Latest NICEIC test (2017) from landlord shows 200Mohm resistance between E and N As above, do I have a floating neutral, is this causing a leak from N, via bonding on sink to true earth (solid kitchen floor)?
  20. M

    Fused Spur 190v between Earth and Neutral ??

    Hiya Guys, I have a gas central heating boiler that is not switching on at all. It's connected to a clock timer and then to a fused spur. Boiler technician was out today to say the boiler is fine and I need an electrician, hence this post ! He said we have cross polarity on the fused spur. He...

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