electrical wiring

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  1. L

    411.8.3 Requirement for Fault Protection

    Where fault protection is provided by an RCD, the product of the rated residual operating current (IΔn) in amperes and the earth fault loop impedance in ohms shall not exceed 50 V.
  2. C

    Non CE lighting without earthing

    Good evening, The wife decided we should have a row of Victorian style cast iron lamp posts up the side of our house. As the dutiful husband I went off and did some searching and found a company selling fairly well reviewed products. Fast forward a few days and the item is delivered, a...
  3. K

    Looking for a C7 Power Cord

    Hi Everyone, I am looking for a 10-15A power cord terminated with an angled (90) IEC C7 polarized male connector. I can find hundreds of non-polarized ones but can find none that are polarized. Does such a plug exist? Has anyone seen one or know of a place that supplies them? A complete, made-up...
  4. J

    The First Table in Section 7 of Onsite Guide....

    The first table in the OSG, p64 (it has no table name). It says the following maximum loads are assumed per circuit, and then it lists circuits and their rating, along with Load. My question, is this table showing maximum load that it's recommended these circuits should reach? Or is the Load...
  5. Lister1987

    The Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020

    What's everyone's take on this? Mandates inspect every 5 years by a QUALIFIED person, whereas EAWR and BS7671 state COMPETENT person. Obviously it won't stop cowboys but does raise the Competent v Qualified debate...
  6. J

    electrical network of coffee trailer

    hello, some advice please about the electrical network of the coffee trailer, (how I have to approach this)? thank you,
  7. cliffed

    Refurb what’s next

    Doing refurb, total rewire & new DB, it’s a remote building, utilising Swa sub. Swa is a 2c 16mm, there is main water & gas to be bonded, At moment this all connects to old DB, in my opinion this does not comply, given my recommendations, client refuses to pay extra for what’s been ok for years...
  8. J

    Diversity on a Ring Final

    Hi there, I'm just trying to get myself into cable calc and my first hurdle is demand and diversity. I understand the majority of what is coming across in tables A1 and A2 OSG but I'm just struggling to clearly understand what I should be using for demand on a domestic 32amp ring final...
  9. R

    Meter tails over 3 metres???

    Good morning Looking for some advice on a domestic job. The consumer unit is being moved from kitchen to cupboard in hallway. The meter is staying in same place but the distance between meter and board is around 7 metres. I have been advised to fit a 100amp isolator at meter and run tails from...
  10. J

    Can someone help me fix an issue with my doorbell?

    Ok so I tried to replace my door bell, but when I took it out the wires were twisted and snapped off too short to rewire. I’m a trainee electrician with little to no experience so I’m stuck. Can I get some more wire and try to extend it by wrapping it around the old wire and covering it with...
  11. P

    The Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020

    Good Evening All, I hope this is the correct forum, please do move if I have my neutral in the live / wires crossed. Thank you for your help with my HMO query. In return, you may be interested in the draft of The Electrical Safety Standards in the Private Rented Sector (England) Regulations...
  12. C

    In ceiling speaker isolation

    Morning all, wondered what your thoughts are here. I‘m doing a rewire in a property along with a new consumer unit for a client. they have now asked for installation of 4 pairs of in ceiling Bluetooth speakers, each pair is supplied by a 12v transformer. I’m trying to decide on the best way of...
  13. S

    How do I certify when there are no rcds to test

    I have an elderly client that wants some additional sockets adding to a ring final circuit, some are simple spurs and some will need the ring extending - pretty simple jobs. she also wants some independent switching in her lounge, an additional light in the hallway with 2 way switching - again...
  14. P

    SWA cable calculations!!

    Ive been asked to confirm the maxium possible supply for an existing SWA sub main and I know im doing something wrong with my cable calculations. Its a 10mm 3 core SWA currently on a b40 on a split load boad but its about 120m run ( direct burial) and they want to run an airsource heat pump...
  15. P

    Terminating armoured...

    Morning all, When terminating armoured into a Cu on the outside of the casing I.e sides, top, bottom, we use a gland this is straight forward but what if the cable comes into the back of the Cu how do you terminate safely and sturdy it in that case? Surely thru a grommet with relevant fire...
  16. B

    Is electrical design and testing mandatory for temporary structures?

    Is electrical design and testing mandatory? Let me qualify this with "I know it is" The problem is I have a client who refuses to accept that any and all electrical systems need to be designed properly, installed, tested and commissioned according to the EAWR and BS 7671 and temporary...
  17. D

    AFFD's and new circuits

    Hi All, I'm a quilified electrician that's been office based for the last two years, I'm a little out of touch so please go easy if this is an obvious question! I'm having an extention on my home this year and been thinking about additions and it got me thinking, are AFFD's needed when...
  18. J

    Light fitting.

    Hey guys. I've fitted 3 LED chandeliers with no issues. Doing the 4th and having a big issue. Everytime I switch it off, the breaker trips. This one has 2 mains connections coming into the light as opposed to just one with the others. Any ideas?
  19. R

    DNOs attitude towards earthing!

    I find this statement from the UK power networks official website so amusing I couldn't resist sharing it. For a domestic electrician, the connection to earth is thought of as one of the most critical electrical safety features. This is what they tell their customers: "It's worth noting that...
  20. G

    Extract Fan 1 Amp fuse - but UK only

    Hi All, Been asked to fit a bathroom extract fan that a customer has already purchased. When checking the manufacturers instructions they are stipulating a double/ triple isolating switch - nothing unusual there - but they are then stipulating a 1 Amp fuse and then in brackets 'UK Only'. This...

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