protective | Page 2

protective

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  1. Sparksaflyin

    Characteristics of protective device?

    Hello fellas. I’ve got a protective device that has sod all written on it apart from the following..... series 3 Henley, pat no: 451302 can someone please tell me what the hell it is? Thanks
  2. T

    Nearby motors damaging LED floodlights

    I do some electrical maintenance for a local church, the main hall is lit by around 12 LED floodlights, (they do look cheap) they seem to be constantly dying, they have asked if a wood work shop across the road could be causing this, with saws and other machinery constantly starting up, I’ve...
  3. S

    Main Protective Bonding Conductor question

    Hi guys Would appreciate your comments on the following.. I am currently involved in the refurbishment of a building with 2 service heads (both in use) but only one gas intake and one water intake. What are the main bonding requirements in this situation? I am assuming both MET's require a...
  4. B

    Defining what equipment has protective conductor current

    Hi all, I have an engineer who has failed a wall mounted data cabinet because the PDU is hard wired into a switched fused spur, the spur is spurred off a ring main in 2.5/1.5 twin and earth. He has failed it under regulation: 543.7.203 The wiring of every final circuit and distribution...
  5. J

    Main protective bonding/equipotential bonding

    I’m just wandering does anyone know where mpb would be located in properties such as apartment blocks or housing
  6. C

    protective bonding conductor size

    Hi guys, I've questioned something at my workplace and after receiving my answer I'm not overly convinced and would like some other experienced gods to chime in :) On a new install in an existing property today I went to bond the Water and noticed it was already done, clearly many moons ago...
  7. R

    Does anyone know the BS(EN) for this primary supply overcurrent protective device device

    Can anyone give me the BS no. for this please
  8. Zdb

    EV charger protective device

    Hi guys, I'm having trouble deciphering some manufacturer's specifications / installation instructions for a three phase dual 32A outlet EV charger. The model in question is the W22 wall mounted unit: I can see that there are 2x 30mA RCD's inside the unit mounted on DIN rail. I'm unsure...
  9. cprfenom

    Protective conductors on an EIC

    Afternoon all. Can I confirm that a protective conductor in section 16 of an EIC refers to bonding to services etc rather than a cpc of a final circuit?
  10. Michaelwgroves

    Can you join Main Protective bonding conductor

    I have a 6mm main protective bonding conductor from a 1981 install; adiabatic equation says this is sufficient and no signs of thermal damage. (Discussed in separate thread). Gas was not bonded, it's a big job to run new cable so I've used redundant water bonding as now all plastic to bond gas...
  11. Michaelwgroves

    6mm Earth and Main protective bonding conductors

    Just been to a 1981 TN-C-S installation to fit new CU. Both Earth and Main protective bonding conductors are 6mm, which I understand was typical back then. 16mm tails with 60A DNO fuse. Upgrading earth and bonding is gonna be tough as run up cavity and round the corner, I ain't never gonna pull...
  12. Sparky_marky2

    Certifcation software/apps recommendations

    Hi guys, I've been doing a bit of research into electrical software/apps as an alternative to the really bad Stroma software (Tracker Mobile) I currently have, I've sampled EasyCert Mobile which I found really straight forward however the layout in which it asked the questions didn't follow the...
  13. haptism

    Which Protective device on MWC

    Hi hope someone can help, i need to record the protective device on a MWC and not sure which to enter. I have removed an old bathroom heater on a 20A radial and rerouted cabling to feed an RCD FCU, the load side of which feeds into the bathroom serving towel rail with a local DP (20A) switch...
  14. L

    Connecting main protective bonding conductor into MET thoughts

    Any thoughts about connecting main protective bonding conductors into the MET instead of distribution boards? Watched a spark do it the other day and never really thought about it myself. Achieves the same result so it shouldn't be an issue.
  15. S

    Assignment help

    Determine the minimum size of cpc for the circuit giving consideration to; Disconnection times Thermal Constraints? Here is what I have worked out so far for the circuit - Ib=p/(Ulx√3) = 12000/(400 x 1.732) = 17.32Amps From Table B6 I selected a C20 which has a max Zs of 0.87 Ω 20>17.32...
  16. L

    Does it need it?

    hi everyone, I have got a job to do in a local hairdresser to change a consumer unit fed off an economy 7 meter. My question is do you need to test and notify the works like you would in a domestic dwelling? Also is it mandatory that the incoming services of water/gas are bonded with 10mm...
  17. J

    GS38 shrouds for Fluke T140 voltage tester

    Does anyone know where i can get hold a pair of shrouds for the fluke t140 voltage tester, mine came glued on when i got it years ago, when i pulled them off they cracked, it hasn't been used in a while only just getting back into the game so i need a pair to pass calibration. I've seen some...
  18. S

    2 ovens on lollipop circuit

    have come accross kitchen job where x 2 ovens are on a lollipop circuit. 6mm t/e from csu to 45a dp switch and then small 2.5 t/e ring with 2 oven outlet plates. each oven only 2.4kw max. question is if tested ok, ie zs and ring end to ends, is this ok to leave as is?
  19. Pat H

    Cable size less than protective device rating

    Noted today an interesting comment on page 43 of christopher kitchers Practical guide to inspection, testing and certification of Electrical Installations ( a great book ) Under Shower curcuits he states: For this type of circuit it is possible to have a cable which has a current rating of less...
  20. Sintra

    Guidance On Protective Conductors

    Sintra submitted a new resource: Guidance On Protective Conductors - Guidance On Protective Conductors Read more about this resource...

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