mains

  1. 2

    Large cable protective device and enclosures

    Hi, thanks for reading this. Ive been asked to look at a job where the DNO connection (single phase 80A TT) is a long run to the final circuits. Small feeder box has been installed and the volt drop dictates 95mm cables are needed to take to another feederbox where the feeds into the building...
  2. B

    Mains Isolator Switch Advice

    Hi there, Any advice on this would be greatly appreciated! (Note, this is not a DIY, I'm using a fully qualified electrician, just posting here looking for advice) We need a new fuse board fitted in a property I manage, which we hope to use for short term lets in the near future (Air BnB etc)...
  3. J

    Mains Isolator advice

    Quick question. I want to put an isolating 2p switch on my incoming supply from the meter to the board. I want this to allow easier board changes in future. Tails are below the 3m. DNO have agreed to pull fuse to facilitate this work. Timing is perfect as they want to update meter and head...
  4. H

    Converting from mains power to battery power

    Hi everyone, I have a basic knowledge of electric but would like advice before I attempt, I have a electrical item that is powered by Voltage input: ~100-240V/50-60Hz - Output: DC 24V, 2-3A, I would like to make it portable by just using battery power, preferably rechargeable any help would be...
  5. J

    Mains cable to consumer unit top floor flat

    Im starting a re-wire of a top floor flat, they have run an 16mm T&E with a 6mm earth from the ground floor to the 3rd floor feeding the CU, replacing this cable is practically impossible as there is no way of getting down without going through other flats. Looking for some advice of how others...
  6. W

    Home Lathe with 3 Phase inverter tripping mains

    Hello - hope someone can advise please. I have a recently purchased second hand Myford lathe which has a 3-phase inverter (Siemens Micromaster 410) Lathe all works fine but regularly trips my RCCB 80A 30mA breaker taking out half of the board - usually when first powering on. The inverter is...
  7. T

    Comsumer unit - upstairs/downstairs ring mains

    Hello, I bought a new build and noticed the upstairs MCB is controlling some sockets on the opposite floor, so if I flick the upstairs MCB it's also switching off a socket downstairs (I think it's a spur) in addition to all the ones upstairs Is there anything within 7671 that states this is...
  8. ben8_n

    Cabinet for mains supply

    Hi all, any recommendations for neat and complaint ways to "house" a new supply -- the main electrical fuse, cut out, meter etc that on our house is inside the house near the front door. It's currently inside a cupboard that needs to come down, but am assuming I can't just cover with any...
  9. J

    Exposing old mains cables, Is this safe???

    Hello. I'll apologize to start with as due to my lack of knowledge on the matter I'm likely to waffle a bit and call everything by the wrong name but hopefully you'll get my point... I am having some renovations done at home and need to have the electrical meter relocated slightly. We have...
  10. N

    Mains water bonding when only couple of inches of copper

    Not sure on this one. Mains water is coming up from the ground in lead pipe in bathroom. 2 inches of copper pipe before the stop tap. All pipework inside the house after stop tap is plastic. Does that 2 inch of copper pipe before stop need mains bonding?
  11. B

    Have the rules for ring mains changed over the years?

    I am sure when I qualified for the 16 edition we spoke about how to treat a ring main. I know the majority of the time we just learned how to read the book and how to find needed headings but I am sure we also spoke about ring mains. If a socket has two cables coming into the back box then it is...
  12. F

    Can I run mains cable inside hollow metal lintel?

    Hello I’m going to install a hard wired 230v security camera, incorporating floodlights, outside and above garage door onto brick. An exposed expanded metal lintel (that is hollow) runs across the garage door opening. Outside it has a decorative brick facing. The brick is not load bearing. I...
  13. D

    LED lighting Mains and 12volt DC on same circuit

    Hello I have recently moved home and I looking to upgrade lighting across the house to LED. In the kitchen I have found that there is installed a mains powered lighting circuit which serves five LED lamps (surface mounted and recessed) Included within the same circuit is a junction box into...
  14. R

    Zanussi double oven tripping the mains

    Hi, I bought my Zanussi ZCV663MWC cooker ten years ago, I replaced the top element four months ago and its been fine until now. When I turn the top oven on it heats up then after ten minutes it trips the mains. Also I have never used the bottom oven but when I turned it on it also tripped the...
  15. Sparkgap

    Super low mains voltage, what works?

    Some months ago the transformer feeding my road had a HV phase loss with the result that my house was only getting about 85V. It was interesting seeing what stuff worked and what didn't: for example, 60W bulbs glowed, fluorescent lights didn't(!), some LED lamps worked, others didn't, and my DAB...
  16. A

    Run vehicle air con on mains hook up

    Hi I wanted to run my car air con on a hook up at a camp site. Could I buy a mains hook up kit and run a charger to my vehicle battery. Would that work? I guess it would depend how much the charger is putting into the battery, what rating charger would I need.
  17. D

    UK LED Batten Lights to Mains Socket?

    Hello, I’m boarding out my loft for storage and I’d like some decent lighting up there rather than loft lights I’m currently using. I purchased some LED batten lights that my cousin, who is a qualified electrician, said he will come and wire in. He’s good at what he does, he’s sadly just lazy...
  18. S

    Warehouse mains upgrade and generator

    Hi guys I have been tasked with upgrading some old rewireable fuseboards for a food warehouse that runs continually 24/7. I was asked to do an EICR on the install as there maintenance guys were having issues with blowing fuses. Wiring issues are sorted now. These fuse boards are old asbestos...
  19. P

    New member seeking advice on spurs ring mains

    Hi, I'm new to the site and wanted to seek some advice thanks, relating to adding fused spurs to existing ring mains in a commercial premises. Some of my other colleagues have been asked to explore ring main alterations, but they look after some site based kit and this is more related to...
  20. T

    SPD Mains Isolator wylex/Proteus

    Hi, I was wondering if the wylex/Proteus SPD Isolators where dual isolator, they have 4 terminals at the bottom, can you use them to take 2 sets of tails of them. And what size earth should be used for the SPD when using 25mm tails and Is connecting it in parallel to the main earth correct...

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