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  1. R

    Wire gauge query when doing relay conversion for headlights

    Hi All, The headlight (Dip and especially High Beam) on my motorcycle, is know to be able to be greatly improved when converting the wire feed instead of being via the switch, over to a more direct feed via a couple of relays. At the same time instead of the 18 gauge wire via the switch being...
  2. T

    Consumer unit query

    My parents have been having trouble with their electrics recently. They had their house refurbished a year and a half ago and discovered some pretty awful DIY wiring from the previous owner so had a significant portion of the house rewired as part of the work. Despite this, they have been having...
  3. Dave Appleby

    Commercial site query.

    Sorry for a bit of a long question. For what it's worth this is Scotland. I have been asked to quote a very large job in an old commercial office space. Site is being taken over and converted to a community church. Work is of a large scale, removing a lot of wiring as multiple walls being...
  4. B

    Alternator Electrical Query

    Hi, When testing the diode on a car alternator all the tutorials state place a multimeter to diode setting, place the + cable to the casing and the - cable to the battery post ( B post) and you should get a reading of .5v to .8v. Swap the cable positions i.e. the - cable to the casing and the...
  5. S

    EICR Coding query

    Hi all, I have recently carried out an EICR on a big house and am struggling with coding on quite a big issue. The main tails & earth's are connected into Henley blocks, then looped into 2 separate consumer units right next to the service head/meter etc. Then there is a 3rd set of tails which go...
  6. DJAndy

    Oven selector switch query

    Does anyone fault find appliances? The element in a fan oven was >500Ω so I replaced it, still no heat. Got the back off and my multimeter on it for a bit of disconnected dead testing: thermostat <1Ω overheat cut out <1Ω selector switch - grill element, light, & fan connections all <1Ω fan...
  7. J

    Insulation Resistance query

    When doing domestic testing, I spend quite a bit of time removing loads & vulnerable equipment prior to carrying out IR tests- allowing me to test between L - N without risk to vulnerable equipment or getting inaccurate readings. I’ve spoken to a number of sparks who go straight to testing L&N...
  8. J

    Schedule of Tests Results query

    I’m new to the forum so first of all a quick hello ? I have my AM2 in the near future & got a query regarding the schedule of test results, namely the cable reference method and cable type. I know reference methods can be found in BS7671 (APP 4). Where there is more than one method for a...
  9. cliffed

    Query on Zs measurements

    Did an install ages back,another company did EICR & C1 Zs on Mccb Square D breaker. Not got all the details yet but anyone know the Zs acceptable on a 630 A Mccb.. The orig measurement was 0.01 ohms.
  10. M

    Outdoor floodlight Grey wire query

    I bought an outdoor floodlight to replace a faulty one. Once I removed cover I can see old light has 4 wires, Red, Black Green/Yellow and Grey. New light is only 3 wires Brown, Blue and Yellow. So I’m thinking Red to Brown, Green/ Yellow to Yellow, Black to Blue. The Grey wire is the one...
  11. B

    Wiring query for external light

    Evening all, I have a (hopefully) quick question about wiring up an external porch light. We moved in to a new property recently and outside the back door there are a bunch of wires (see photo) where clearly an external light existed but has been removed. Inside there is a switch which I'm...
  12. R

    Cable Selection Query

    For the purposes of selecting appropriate cable size using the current capacity tables in Appendix F of the OSG is twin and earth considered to be a two core cable or three core cable given that under normal operation only two of the cables are carrying current and if some portion of that...
  13. H

    UK Need advise on RCD query

    Hi all, The rcd in my single rcd consumer unit keeps on tripping. It first happened when I turned the kettle on. It then happened when I turned my shower on. Both of these times my portable radiator has been on. I have tried the kettle and shower both at the same time and individually when the...
  14. R

    Upgrading Cooker Query

    Hello all, thanks for checking out this post. I’m just after a bit advice today. I’ve got a very limited knowledge of electrical installation from a couple of C&G courses I completed after leaving school. I didn’t pursue that career and it’s been a good 7 years so I think we can write that...
  15. A

    Tripping Query

    I changed a couple of sockets at a property I am working on and put my plug tester in to check and it tripped the rcd. Tried a couple of times then took sockets off to check them - all ok. Tried to do loop test with my kew 63 tester - tripped again. Tried a few other sockets in property and all...
  16. A

    Cable query for Oven install

    Loft space has a 10mm T&E cable terminated into a JB in the loft space which was from a old shower being removed. The requirement is for a oven and microwave being installed into a new space at back of kitchen where only a 13Amp socket is available. The current draw would be 22Amps. The new...
  17. BeeJay2

    Air horn query.

    Hi all. I've always fitted a set of single tone air horns that I've swapped from car to car over the years, except, to my present motor, simply because the horn is very difficult to access. Anyway I arranged for my local garage to do the job & decided to make sure they were okay first, not...
  18. Q

    Insulation resistance query old style hager rcbos

    When carrying out insulation resistance testing on old style rcbos (hager) I understand you are supposed to disconnect both line and neutral aswell as both the neutral and functional earth fly leads.....however does this in theory mean you need to disconnect the above for all rcbos at the same...
  19. F

    Cable Size Query

    Hello, I'm hoping someone can help me with a problem I've come across on behalf of a colleague. A single phase PV system with a 6kW inverter has its AC running 187m underground to its point of termination. The cable that has been used is a run of 3 core SWA (6mm) carrying the neutral, and...
  20. lozarus

    Wiska WK308 Query

    I think I'm being dim here, but it's been a long day and I won't be able to sleep with this rolling around in my head - so can anyone help me out? Replacing 3x junction boxes outside, serving 3 external lights which have become waterlogged due to poor original installation. The first two...

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