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  1. G

    length of pvc conduit run

    Its been a while since I last worked with PVC conduit but I seem to remember you had to have an access box every so often. Can anyone remind me of the regs regarding this.
  2. R

    3 phase Conveyor drum motor?

    Hi guys, anyone know where I can source a new 3 phase conveyor drum with quick deliver? thanks
  3. J

    Parallel Feeds

    Doing an EICR on a building and a sub board has two 4mm twin and earths feeding it. Cables are connected into same breaker in main db but take different routes to get to sub board. Is there anything in the regs regarding as I cant find anything. Cheers for any information or advice.
  4. N

    Max length of run?

    Can anyone help with this..2500w of panels. 6mm cable. Max length of run?
  5. W

    Commercial roof safety

    Morning all, Would anybody mind sharing safety tips for working on single skin metal sheet barn roofs. I have 1 10Kw to do and i've just priced a 30Kw. Do you use safety nets, crawler boards or fall arrest harnesses? or a combination of all three. Does anybody have an idea of cost to safety...
  6. S

    Kopex / flexicon for this job.....your thoughts

    I've got to price for some alterations to a room in a commercial building that has been an electronics lab. It's new use has a simlilar vein but they want the room looking more "slick" , all cabling flushed in and dado trunking. Problem being the existing is in singles and plastic pipe surface...
  7. R

    radial circuit

    Hi all, gone to look at a job today and would like a bit of advice. The job is to get power out to 2 sheds from a garage CU. The CU in the garage has a 32mA RCD and 6amp and 16 amp Mcb. The power in the garage is run on a radial circuit, so I was wondering if I could carry on the radial circuit...
  8. VoltzElectrical

    why the light doesn't work!

    I was fault finding a streetlighting column today and found this. That'll be why the light doesn't work then. Wouldn't it have been better to drop a new length of cable in instead of using chokky blocks? They have their place sure, just not inside the very top of an exposed lighting column.
  9. N

    Tails greater than 3m length..

    Hi all, I know tails are meant to be less than 3 metres in length and if not then a switch fuse needs to be installed. What's the situation when the tails from a flat go from a communal hallway then into the consumer unit? (Approx 5m) Do you just put a switch fuse next to the meter? (The run...
  10. H

    maximum meter tail length and composition

    In order to meet current regulation the maximum meter tail length should be no more than 3M and if over a 100amp fused switch should be fitted - is that correct. (This guidline is not in the iet on-site guide except that this maybe specified by the distributor) 521.10.1 mentions that the tails...
  11. S

    Length of meter tails

    Been asked to quote a job - total rewire of four flats. As individual flats it's all very straight forward, ring, lighting, shower etc. However UK Power networks are installing a new head and meters for the whole block on the ground floor. Obviously the distance to the top flat is going to be...
  12. B

    max main bond length

    Hello people Doing cu change , TNCS, upgrading bonding , the gas is other side of house , cu in double garage had to take cable up into bedroom above in trunking and then across loft down external wall i conduit into gas meter box and bond there. When measured route it came to abouty 25m but...
  13. M

    Length of DC cable run

    Hi guys. When using a DC volt drop calculator, when it comes to the length of DC cable run,does that refer to the distance of the panels from the inverter or the distance of the cable from the - terminal of the inverter to the positive. As in the length of the single core circuit from positive...
  14. telectrix

    RCD or NOT

    Situation is: customer has installed a 6mm cable to his shed for a couple of sockets and a couple of lights. he has actually made a very good job of it, 6mm T/E in 20mm pvc conduit, all surface ( none buried.). now he wants me to supply accessories, MCBs etc. and connect up. as it's outside, i'm...
  15. B

    Immersion length

    What is the standard length of the heating element within an immersion tank? Need to replace one tomorrow and would like to know if they are standard size before I go to job The tank has one element only, located at top of tank
  16. P

    Extension Lead maximum length

    Sure I am missing something obvious here but having recently gotten into PAT I am confused by some of the extra long extension reels available. The code of practice for in service inspection & test states clearly the maximum allowable length of extension leads in relations to csa of the core...
  17. K

    Voltage droop

    Hi guys and girls I'm new to the forum and it's probably on here somewhere but could someone please tell me a simple way of calculating volt drop as I'm not having much joy with the Maths side of things and I've got my 2391-10 in two weeks as easy as possible plse
  18. C

    Consumer unit length from main cut out

    Hi , I doubt there will be a regulation against it but is there a maximum distance in a domestic property between the cut out and meter and the fuse board for the flat? Currently in a flat iv been at there is a redundant storage heater board beside the meter and main cut out which will be ripped...
  19. L

    Length of cables

    Just changed an FCU, and terminals are in different places, therefore a bit tight for some wires. Just wondering what length of cable you all leave in back boxes for such eventuallities! Cheers
  20. S

    Radials Circuit Designing

    Hi guys, doing a rewire in which i plan to do the circuits in 4mm as radials, one down one up and kitchen. When designing how can i work out the loading along the circuit? Also how can you work out the loading on a lighting circuit radial as the load will be split along the length so the...

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