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  1. 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...
  2. A

    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...
  3. 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...
  4. 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...
  5. 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...
  6. 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?
  7. 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...
  8. 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...
  9. 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...
  10. 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
  11. 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 ....
  12. 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?
  13. Andy78

    led extrusion/channel.

    Does anyone know of a good online supplier of recessed aluminium channel for led tape ? The numerous wholesalers round here all do not seem to carry it.
  14. L

    Volt drop

    Hi I've a few questions regarding volt drop. Apologies if its a little longwinded but I'd like to get my head around everything. An example scenario is a section board with a TP sub main to lighting and power board (DB2) Calculations for circuit : Supply Voltage = 400 Volts Ib - Design...
  15. Y

    DC Volt Drop Calc

    Hi all, I appreciate this has probably been posted to death but the search wont load on my phone. I have to calculate for Volt drop in a DC circuit, There's next to no load (2 amps max) the cable is 4mm pvc twin, and ln a loop from the control unit to the loads. OveralL Length 50m Is the calc...
  16. sam400

    1m sds drill bits

    Can anyone recommend me a decent 1m sds drill bit, I've managed to shear a few of them off at the chuck.
  17. yellowvanman

    LED Tape

    Anyone installed long lengths of this? Customer wants it stuck on top of a picture rail around a room (about 20m), there will also be breaks in the picture rail for doors etc. Just need a heads up on pitfalls with this sort of length required.
  18. S

    Domestic Multiple LED strip power issue

    Hi people. Bought a 12v dc power splitter cable to power 2 5meter length 5050 colour change LED strip lights. noticed the next day that the cable melted really bad. Im not sure why this is? the ac-dc is a 6amp 72watt and the total power of both strips should be 48watt so that should be fine...
  19. M

    Volt drop

    Hi, Im a fairly new sparky, So just wanted to get a little idea as im not 100% sure, Im adding 12m of 1.5mm cable in trunking into a conservatory from a fcu of the ring main the volt drop for this part would be 4.5v so i may need to up the cable size. But what i need to know or confirm is what...
  20. V

    Hi I'm new here! Have a question on Radial & Ring circuits

    I am a DIY and working on an extension on my home. I found out that one area of my house is on a 4mm radial for sockets on a 32amp mcb which I know is fine. Now the question is Can I safely continue wiring 4mm radial? Total length from distribution to last socket will be around 60metres with 12...
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