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  1. V

    Correct Method to extend CT Clamp cable for EV Charger (Also should it be earthed)

    I'll start with the problem. I've installed two Hive Mini Pro 3 EV chargers, and both have had the same fault, which I think I've now isolated to the CT Cable (Not the clamp or its direction). Essentially if I connect the CT Cable to the EV Charger and enable smart charging, the EV Charger...
  2. V

    EV Charger reporting PEN Fault

    This is a baffling fault I've been fighting with for a couple of weeks now, so I wondered if another set of eyes will help. I installed an EV Charger a few weeks back, and all went well for a while, then the client called me to say it wasn't charging randomly. Resetting it brought it back to...
  3. V

    Requirements to Install EV Chargers

    I think this is the right place to post. Up until now I've steared clear of installing EV Chargers, mainly because as a Self Employed Sparky I've not been able to compete with the national companies. However I'm getting enquiries from my client base asking to install EV Chargers, so I'm going...
  4. V

    Unusual Neutral Tail into Consumer Unit

    Hi, Ignoring the appauling conductor terminations which I found, in the background of the photo you can see a really odd neutral tail terminated into the main switch. I've never seen this before, has anyone else, and if so what is it ? Oh I should add this is at a flat, so the tails are...
  5. V

    Extending tails - SWA or Hi Tuff ?

    Just wanted to know which people use. My case. Client converting attached garage into new rooms. Consumer Unit has to move to accomodate this and will be greater than 3m from meter. Void above garage is used to route cables to main house so can use this to route cable for extension to tails...
  6. V

    Rats and tripping MCB

    Can i just check something. If a rat decides to chew a cable will it trip the MCB or RCD ? I ask because I had one house recently that had a randomly tripping MCB and it turned out to be a chewed cable. I was surprised as i would have thought it would trip the RCD but it never did. A chewed...
  7. V

    Unusual Ring Final Tests

    After fixing a few CPC related issues on a ring final I got the following results L-L = 0.47 N-N = 0.47 CPC-CPC = 0.69 R1+R2 Tested at 0.31 R1+Rn Tested at 0.25 All looks good, until that is I realised that the CPC-CPC is actually not quite right. It should be 0.78 (0.47 x 1.67 for a 2.5/1.5...
  8. V

    Convert a dry lining box into a surface mounted box

    An odd question granted but bear with me. I've got to extend a radial circuit in a community centre to fit a new hand dryer in the toilets, but I have two restrictions. 1. It's a listed building so I'm not allowed to damage the walls in any way. 2. Even if I could, I've been told there is...
  9. V

    Test leads giving 0 ohms

    Hi, My Kewtech KT63DL has just come back from its annual calibration without any issues, but Ive just taken it to site and attempted to do the usual nulling of the leads before doing a continuity test and they keep coming back as 0 ohms which they didnt used to do. Normally i had to null them. I...
  10. V

    Electric Shower from a sub board

    Hi. I'm being tasked with installing an electric shower into a property that was built back in the 1980's. The main consumer unit has only 4 ways and is protected by an RCD, and is fully populated and in a very tight space under their stairs. However one of the MCB's is currently used to feed...
  11. V

    Is there a way to test a SPD without spending thousands ?

    I know there are many MFT's out there which can test SPD's, but they all cost thousands of pounds, and I personally can't justify that cost which currently isn't mandated. However it would be nice to know that when I install a SPD that it will function. Is there a way of testing such a device...
  12. V

    EIC for 230V installation into a mobile caravan

    Hi, I've got to a point where I need to complete the EIC for the caravan I've been working on. This isn't a static caravan, so will be going from place to place where they may or may not been mains hook up. Dead testing has been easy, that's been no different from normal and the RCD tests have...
  13. V

    Maddening MCB Tripping fault

    Hate these. Been called out to troubleshoot a tripping MCB. It's a house I've been to before and I know the wiring is a real dogs diner, but anyway. Got an MCB that's tripping out with no appliances plugged in. The sockets themselves are not in a great state, however continuity and insulation...
  14. V

    Neutral Conductor Size - Main Switch to Neutral Bar

    Don't come across this very often - but I've had a CU delivered for a caravan job (not static btw), and it's been supplied with a neutral conductor from the main switch to the neutral bar! Definitely an oversight, but I've got plenty of singles cable in stock, so rather than send it back, I...
  15. V

    1.5mm radial in a caravan ??

    I do love my job, and this is a fabulous job to be involved with, but jez the regs aren't clear on this type of thing. In a house, you have either 2.5mm or 4mm on radial circuits. That's fine - but a caravan has nothing like the load (At most 16A is coming in from a mains hook up). So...can I...
  16. V

    Plastic Consumer Unit in a caravan

    Hi, I know the regs say a metal consumer unit must be installed in all new installations, but does anyone know if the same is true of caravans/campervans etc ? I'm installing electrics into a caravan, so it's a new installation, but it falls under section 7, and it's not clear whether or not a...
  17. V

    Does BS7671 specify colour coding for conductors used for <50V

    Quick Question. BS7671 specifies colour coding for 230V AC conductors, but I've looked through it and I'm sure I can't see anything which specifies colour coding for <50V AC or DC conductors. I've done a lot of work with 12V/24V DC stuff and it's always been Red for positive, Black for...
  18. V

    Hi-Flex Cable CE Made in EU ?

    Hi, I'm sorting out an off grid installation and I've been provided with 25mm cable labelled "Hi=Flex 25mm CE made in EU" to connect the batteries to an inverter. Looking them up they appear to be rated at between 140A and 170A depending on which website you go to. Now the batteries will be...
  19. V

    230v install into a caravan

    I've been given a really interesting job to do, and that's to retrofit a vintage caravan with 230v. Another company is doing the renovation work, I'm just tasked with the electrical work. Now, there's a lot in section 7 of BS7671 to do with caravans, but it is vague on the earthing. My...
  20. V

    Multiple sub mains, how would you do it ?

    This is a question with probably so many answers and solutions, but I wondered how people would do it. I have a clients house which already has one submain on a 40A MCB to a Garage with a 20A RCBO radial and a 6A RCBO lighting circuit + a spare 32A RCBO. Selectivity not an issue. They need a...

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