length

  1. S

    Doorbells again - volt drop / max bell wire length

    Hi Folks I've been trying to work out whether a doorbell will work with approximately 16m run of bell wire. I've tried to find out volt drop, resistance (to calculate volt drop), or even CSA of typical bell wire. But no luck. I tested an approx. 3m length with my MFT and got 0.87 Ohms. That...
  2. C

    How to increase cable length?

    Hi guys, Im very new to this forum so thanks for hearing me out. I have an led light that is waterproof. The issue im having is that the cable is not long enough for its purpose. I needed some help or advice as to how i could find a cable attachment to increase its length.. i have attached pics...
  3. G

    Length of tails between meter and consumer unit

    Hi, I am currently studying for my 18th edition regs update exam and came across a video by SparkyNinja on you tube. I think SparkyNinja is very good and produces high quality content. However I disagree with his interpretation of regulation 434.2.1 (i) In his video he says you need a fused...
  4. Zdb

    Expected circuit length (R1+R2)

    Came across this table from on old thread: Is there a table of expected R1+R2 results in BS7671? - https://www.electriciansforums.net/threads/is-there-a-table-of-expected-r1-r2-results-in-bs7671.103412/ I'm just wondering if anyone has the original or a more detailed version that they...
  5. F

    Siren sounder wire length

    This is something I have never come across before even though I have installed a good few alarm systems in my time as a DIYer. I know it is a cheapo alarm but it shouldn't be any different. It came with a little siren and about two feet of flex, black and red two core. I intended to put in to...
  6. T

    Insulation resistance test on length of SWA cable

    Doing new supplies for a school new Shneider 3 phase & N MCCB panel board. 50mm 4 core SWA one end made off in the board earth fly lead from banjo to earth terminal. The other end gland made off in gland (fly lead not made off yet) 3 phases and neutral just hanging there. Done installation...
  7. Y

    Ring circuit cable length

    Hi all I have a ring circuit with 13 sockets. 2.5 mm 3 core cable. My floor area is 60 sqm My question is what is the maximum wire length for a single ring circuit? I used 92 meters of wire for the whole ring circuit. Also I only had a c type rcbo available at my local electrician. Will this...
  8. D

    On off car battery switch - cable length?

    Hi, My car is Mitsubishi Colt 1.3 (1998), and I'd like to install a battery on / off switch in the interior of the car. My question is: would it be ok to use around 1.5 meter length of normal battery cable? The idea is to connect it to the battery negative terminal and to the existing...
  9. 8

    Max length of meter tails

    Ive been asked to look at the electrical installation at a large 5 bed property with an attached annexe that the owners are converting into a 2 bed holiday let. There's one supply cable that comes into the annexe for the entire property . This is currently routed via a single meter to a CU . 2...
  10. P

    The length of a female minute

    Do women have a different size of minute? I ask because if my wife says "I'll only be a minute" I know she will be at least half an hour. When I get commanded to carry out a job, and I know it will take a couple of hours, her estimate is "It'll only take a few minutes". Can any one explain?
  11. Andy C

    Crimping to extend cable length.

    Hi all and thanks for the help so far. Re crimping, I have read posts regarding this before. I have just seen those heat shrink solder connections. I was going to use normal red and blue crimps then heat shrink each individual core then heat shrink over the whole T&E. What are peoples...
  12. uksparks

    Minor Predicament over RFC Length

    Hi, I have just started a new build today, its a large U shaped bungalow with vaulted ceilings etc. I have split the property down into a lot of circuits to help with things due to cable runs etc. I have just wired a section of it today, I was going to do it all in 4mm radials, but by the...
  13. N

    Meter Tails

    Hi, On site dispute needs sorting. We have a consumer unit 3m away as in distance (not cable length) from DNO (outside meter box, flush with wall). We currently have a 25mm 3 core SWA from DNO to consumer unit. Running within the fabric of building and it's protected from the nails and the like...
  14. T

    max length of a 1.0mm flex

    Testing a school which has had lots of LED upgrades with exor controls. 12 way unit above the suspend ceiling with flex's down to the switches. All the leads were 12/14 meters long with the most of it thrown across the ceilings like spiders wed. I use to have a table of max loads and sizes but...
  15. E

    Home Test Rig for Domestic Installer. Apols in advance for the length of this one...

    As I lack practical experience and recently failed to impress NICEIC into Registering me, I thought I could build my own test rig then test the hell out of it and try to develop fault-finding skills before paying for another assessment. My rig is deliberately non-logical - eg I have a switch on...
  16. R

    Lighting circuit cable selection

    For selecting the correct cable size how do I determine the cable length in a loop in lighting circuit? Will it be the distance from the consumer unit to the final ceiling rose? Do I have to take into account the cables running from each ceiling rose to the light switch? I have attached a...
  17. J

    hdmi or cat5 at 10m length?

    will a 7.5/10m hmdi cable to tv be ok to use or will I hve to use cat5/6 how is the lata done?
  18. yellowvanman

    EICR Observations

    Would like to get other opinions on the following observations of a property that was rewired 10 years ago: 1) Excessively long ring - r1/rn/r2 = 1.56/1.56/2.48 2) Mismatch of RCBO - Hager RCBO in Legrand CFU with othe rLegrand MCBs
  19. R

    Loose Wire Underfloor Heating Cable Can Be Cut To Length?

    I often install loose wire systems , mainly because of the shape of the room and the fittings like showers and toilets , the question is are there any out there that can be trimmed to length and sealed , the amount of times I have to keep living and relaying to use the full length is a pain ....
  20. H

    Rcbo functional earth location

    When wiring an rcbo where do you tend to put the functional earth? I'm assuming it will be tricky to ensure the small functional earth will get a good grip when placed with its corresponding cpc, so do you put your functional earth in its own terminal?

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