understand

understand

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  1. P

    What will help me understand and pass my 2391-52?

    Hi guys, I’m looking to book my testing and inspection 2391-52, I have very limited experience on testing. I have completed my AM2 and the testing part was pretty easy. Of course the 2391 will be more in depth etc and I’ve been hitting the books going through guidance note 3 and bs7671 and...
  2. J

    Could somebody please help me understand this circuit?

    Could someone please explain to me what this circuit is used for? I believe it is a full wave bridge rectifier but I'm unsure as to what the zener diode is used for in this arrangement? Thanks in advance
  3. OnlQQker

    I Understand The Electrical Symbol But What I Don't Understand Is....

    How this can actually represent the load on the back of a dimmer switch. It looks more like a rollercoaster with a tree fallen on its track. Can anyone shed some light on this before I waste hours of time on the internet trying to find the answer! Many thanks in advance, have a good evening...
  4. R

    Help please to understand whether my PV system has been correctly installed?

    I have recently had installed an 8 PV panel and inverter on to my roof. This was a local authority initiative which was installed free of charge. The system has been working and reductions in my electrical usage is being assessed. I was so impressed with the reductions that I have had a further...
  5. J

    I don’t understand when all lights flicker after adding second light switch

    Adding an image of my set up Basically this is the run across like 60-75 ft. The main line comes into a switch to control the entire line. That continues through 8 lights and then into an outlet. Originally After that outlet I had a light but I wanted to be able to control it independently...
  6. Z

    QELTK3007 Understand the principles for diagnosing and correcting electrical fault.

    Good evening to all..?????????????????????????.. It’s anyone got examples question for 007 EAL fault finding exam questions. Private message, Please… I’m ready to pay Paypall…
  7. L

    LED wiring series-parallel / help me understand

    I have a constant current driver for led lighting with an output of 1,05A at 150V dimmable down to 50%/525mA I want to wire one LED spot with ~67V/1,05A and a series of LED strips at 23,5V/1,05A each, in parallel to the dimmer mentioned. Basically I want to have a switch for the spot and one...
  8. C

    Who can help me understand this...?

    Okay, this seems to be happening on two separate circuits at my house. 1950s house - newer 200A service in basement and a sub-panel upstairs. The lighting circuits up are essentially ungrounded. (older, silver cloth covered, romex looking stuff. So - I'll explain one of the examples. I have a...
  9. D

    Understand pricing of a job - labour and materials

    Hi, I wish to get a rough estimation of how much a job should cost considering the UK: Supply and install 44 Led downlights in ceilings Rewire 9 of these downlights in a single room after changing their position Move a single switch from outside a bathroom to inside replacing the existing...
  10. R

    Would anyone mind trying to help me understand this question please

    I initially went for answer b) because in GN3 page 68 (2.6.17) I read "At every relevant point of the installation" but then I read The inspector must have knowledge of the design in this report as, for example, if the switchgear at the origin of an installation is suitably rated for...
  11. D

    Help me understand why my house is switched on neutrals?

    Good evening everyone, I'm hoping one of you professionals can help me understand what is going on with my home wiring and confirm my thought process. We bough a home in July, built in 1993. As we have painted and remodeled I have been replacing switches and cover plates as to be expected. When...
  12. EricMark

    Battery charging, not a problem, but trying to understand what is happening.

    I use smart chargers, and the basic design is each time it hits a set voltage the charge rate drops, so starts at 3.8 amp, then 3 amp, then 0.8 amp and finally 0.1 amp, however if the voltage drops below 12.8 volt on the 0.1 amp charge rate it will return to 0.8 amp charge rate, some times it...
  13. I

    Need to understand the neutral conductor

    Appreciate there are a lot or questions about this already but I just can't seem to grasp it so hopefully asking the question in my way will help. Background: UK 240v AC domestic system. As I understand it, if everything is wired correctly and there are no faults, I can touch the neutral...
  14. OnlQQker

    Trying To Understand Diversity

    I'm trying to understand diversity a bit more. Someone, somewhere done a calculation to determine how much use the circuits would be undergoing at any one time. But what if somebody moved into a flat/house and didn't care how much it cost and just run everything all at once. I know this rarely...
  15. M

    UK DIY. Can anyone help me understand why this complex arrangements of wires are connected this way from these two seperate meters

    Is this dangerous ? Thank you for any advice given
  16. qaz

    trying to understand 3 phase motor/capacitor installation

    I'm a qualified mechanic but always tackled small electrical jobs without incident. wonder if i can get some advice re a 60's potters wheel. it consists of : -a 220-250 volt 3 phase, c/s 50, motor -an largish oval capacitor [with a resistor between the 2 contacts] some distance away from...
  17. Automation ATO

    I don't quite understand the brushless motor parameters

    ITEM Qunt SERVO MOTOR 3 PHASE BRUSHLESS 2 IFT 6034-4AK 71 – 3AA1 EN 60034,NO YF P 921 6207 01 003 H CE Mo 1.65/2.0NM IO= 2.15/2.6A 60/100K MN= 1.4NM ŋN = 6000/MINT UIN-300 VY IM B5 IP-65 TH...
  18. velmareth

    Just don't understand why SELV pullcord won't work

    I've recently purchased a SELV pullcord extractor fan for my bathroom. I checked and 12v are running through where the old fan was so an SELV should work perfectly. I've wired it up as per this photo, but it doesn't work when I pull the cord. Could anyone help me understand why? The current is...
  19. O

    New to the site and eager to learn & better understand

    Hello everyone. I know an amp from a volt and a ring from a spur but despite being electrically trained and a background in Electrical Engineering, I’m not an Electrician. So I’ve joined to get opinion, advice and guidance from the experts, to help me with my DIY projects and to do things...
  20. sham

    Is a web-page necessary as I do not understand it's worth for more work.

    I never have and still do not understand how a web page can get me more work. I can't imagine someone in their underpants on the internet typing for an electrician whereas he can ask his neighbour or someone anywhere or phone a friend. Most of the work I have got is through friends and me giving...

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