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csa

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  1. H

    how to measure csa

    Hi there, I've not posted much before but been reading old threads and picking up advice from this forum for a while - most problems I've come across somebody else has already asked and been answered. I've got my NIC assessment this week and now starting to brick it. Simple question - how do I...
  2. F

    What CSA is the Neutral conductor in this split load 17th CU unit

    Had a look at a split load 17th edition RCD CU, quite new - one of the sides has a solid copper neutral that runs off to the Neutral bar on the DP isolator of the CU. Basically, due to a loose connection, a bit of Arking has gone on and made a mess. I want to put a new Neutral in to replace the...
  3. L

    Tail csa upgrade...would you bother?

    Was asked to go and check over a house someone I know has just bought and basically do all the tests to establish if there are any problems ect....all the main protective bonding is undersize and needs doing and I found an unfused 2gang socket fed with 3core 1.5mm, but the home owner has asked...
  4. M

    CSA part deux

    hi every one just having a bit of a blonde moment ( no disrespect to blondes) but struggling to know the the formula of this question. If a singular circular section conductor has a diameter of 2.256mm what is the cross section area. I know its 4mm but confused as to what formula to use...
  5. T

    Zs and SWA csa tables

    I thought these tables may be of interest to some of you testing people
  6. the pict

    cpc csa

    Am I right on this, as far as I can fathom the regs state that the CSA of the CPC should be equal to the live conductors but T&E are not required to conform, so does that mean if a circuit is wired in singles in plastic conduit then the rule applies, but if wired in steel conduit and the conduit...
  7. Amp David

    What CSA would you say?

    Looking at this picture, what size CSA would you the black bit of cable is? For reference working fronm left to right we have 2.5mm, 4.0mm, ?mm, 6mm
  8. G

    MICC (Pyro) Sheath, Actual CSA Sizes.

    Physical cross sectional area of MICC/PYRO copper sheath when used as CPC. 2L1 ****** 5.4 mm2 3L1 ****** 6.7mm2 2L1.5 ****** 6.3 mm2 3L1.5 ****** 7.8 mm2 4L1.5 ****** 9.1 mm2 2H1.5 ****** 11 mm2 3H1.5 ****** 12 mm2 4H1.5 ****** 14 mm2 2L2.5 ****** 8.2 mm2 3L2.5 ****** 9.5 mm2...
  9. K

    Swa csa??

    OK, sorry to ask what might be an obvious question, but is the csa of the steel wire, forming SWA cable standard for each size of cable? For example, does a 2.5mm SWA cable have 5mm csa of steel wire, and a 6mm SWA cable have 10mm csa of steel wire, or does it differ between manufacturers...
  10. T

    Doubling up on cables to increase csa.

    Hi everyone. Im a fire alarm guy, who was qualified as a spark, over 27 years ago, to the 15th edition. Just fitting a new alarm system into a kids nursery school, and noticed that a new consumer unit had been fitted since I first quoted the job. The spark has doubled up two 10mm earth singles...
  11. D

    Reduced csa of cpc in T&E

    Evening all, Sorry to bother you guys with possibly a very simple question but something I've never been clear on is why the csa of the cpc in twin and earth is smaller. I've just started my electrical career and my fellow colleagues argued over the reasoning when I asked them! Any info to...
  12. C

    Cable CSA?

    OK boffins, help me out ........ Called to job where there was no bonding to main incoming gas to a block of flats, and the client required bonding to be installed. I knew it had to be large, so consulted table 54.8 in order to size it, based on the size of the neutral. Which led me to my...
  13. N

    CSA of Tails

    how about this one What tail size would you put down i put down 2.5 mm as this supplied the main CU there was one for the cooker one for the shower one for a shed , oh at its all protected by a 100 amp 1361 ,
  14. Amp David

    Split load CU cable CSA

    In a regular single phase consumer unit, what CSA is the cabling that connects upp the RCDs to the nuetral bars and main switch?
  15. marksparky

    CPC csa

    Hi folks was wondering if someone could point me in the right direction for minimum size of cpc allowed on a 32amp (rcbo) ring? It looks like 1mm to me with 2.5 live conductors. Any help much appreciated:d
  16. lurch

    MICC - sheath csa

    can someone advise where I can establish the CSA of the sheath of MICC please? Thx in advance..... Lurch
  17. M

    Csa

    hi all i'm having the blondest of blonde days to day can anyone point me in the direction of how to work out the following : "two conductors of 6mm and 4mm are connected in parallel, thier effective CSA will be" ? I'm strugging to define my A**S from a hole in the ground so any pointers will...
  18. L

    ratio of reistance to CSA, (Robin tables)

    Hi all does anyone know where I could find a table of resistance per meter for he given csa of a cable. I know that, "Robin" produced such a booklet, but as I bought my Robin testers second hand, I didn't get the booklet which saves a lo of calculation. If not does anyone know where I could...
  19. B

    meter tails csa question

    just wondering if anyone knows the formula for calculating csa of meter tails ? would be much appreciated cheers Ben
  20. S

    csa of main earth question

    hi all, just got in from work and cant be bothered looking in the book!! job today is TN-S with 60A main cutout fuse (1361). 16mm tails and a 10mm earth. i looked in the book a week ago and as far as i can see, if the tails are 16mm then the main earth needs to be 16mm, is the correct? also...

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