polarity

  1. C

    Reverse polarity on pressure mat

    I have this PM156 pressure mat 25V/0.25A and I want to make it operate a low voltage light by switching off the light when pressure applied, I will need to reverse the polarity, does anyone have any ideas?
  2. S

    The importance of polarity

    Talking with one of the guys in the office about a mysterious boiler fault (runs, ignites, locks out) reminded me of an issue in a new boiler room some years ago. Three new gas boilers all installed at the same time, due to handover to client but one boiler kept locking out. It would go through...
  3. S

    Type S RCD Polarity Clarification

    Given the RCD pictured below With the manufacturers instructions here: Am i right in interpreting that as well as being able to bring the incoming feeds into the bottom, i can also switch the LIVE and Neutral sides over, so that this arrangement would be possible? Forigve the crudity of...
  4. C

    Professional reverse polarity installer

    Hey guys I want to be an electrician but am currently only allowed to pull a main fuse and fit meters and ancillary devices/switchgear. I am looking to the future to a day when I can legally remove the cover of a CU.
  5. M

    Is it possible reverse polarity on a supply?

    Having a brain fog on this Is it possible to reverse polarity on a new connection or a meter swap and have it to go unnoticed ?
  6. HappyHippyDad

    Polarity on this led driver

    Hello all. Just a bit unsure about polarity on the primary side of this LED driver. 99% certain one relates to live and two to neutral?
  7. D

    RCD polarity testing

    Hi, I've recently done a PAT course after the large company I work at discovered we have a Deltapat 3309 kit tucked away. I'm actually an automotive electrician maintaining the electric forklifts and pallet shuttle 'robots' at the factory but they decided to expand my skills which I appreciate...
  8. baldelectrician

    Serious issue - missed by people

    Went to an EICR yesterday to a let property that was tested 5 years ago (and apparently passed) 🤭 See how long it takes you to notice - the red box will be a give away 😀 The Wylex RCD was also noted as a C3 Clue: Cilla Black
  9. I

    GFCI issue that is not related to the circuit it's protecting.

    Having lost my father in law many years ago, an electrician and electrical engineer, I'm now at a loss for a sounding board for any issue that comes up that I get stumped with. I am hoping the fine folks here may be of some assistance. I am having a GFCI/ AFCI issue in my sub panel...
  10. J

    Excessive Electrical Bill

    Hi, I always receive high electrical bills average £180/month, I have monitored usage, switched appliances off, reduced usage by not using appliances; i.e. dishwasher. Nothing I do seems to reduce the amount of the electric bill. I have switched supplier, always make sure tariff is discounted...
  11. Algarve Sparky

    Help with solar pv polarity

    So I have completed a rewire on a house that had stood empty for several years, vandals had stripped the place including pulling all of the cables from the tubes. So rewire was a case of replacing cables, board, sockets and switches. However the place is no longer connected to the electricity...
  12. S

    TP & N Continuity & Polarity

    Just practicing for my AM2. When testing a 3P and N socket, as I understand, R1 to R2 is CPC to any live (L1, L2, L3) to prove continuity, but how do you prove polarity?
  13. P

    TV Lift Reverse Polarity Motor and Limit Switches perhaps?

    Hi. I want to control a TV Lift from a home automation system. Its hasn't got any standard way of doing this and the person setting the home automation needs to know just a few things to get it working. Ive had an electrician look at the control box and motor, he's figured out that the...
  14. M

    Polarity testing supply

    I'm probably missing something obvious here but if the polarity is reversed upstream of the cutout How are they getting 230v between N-E ? Surely they're still linked at the cutout ?
  15. S

    Does polarity matter for an RCD?

    Hi all, I recently was given an old 2 pole Legrand RCD meant for the European market but it doesn't have any indication of which side is neutral and live, and also doesn't indicate which side the supply and load go into. A picture is attached. I've looked at the data sheet which doesn't provide...
  16. M

    MCBs Polarity ?

    Quick question Am I right in thinking that all standard SP MCBs are non -polarized ie: supply can enter top or bottom of unless they're marked with line/load markings Also the 1 and 2 markings on MCBs ,what does that indicate ?
  17. L

    Head went funny.... Reverse polarity showed up and still after swapping cables ?

    Maybe lack of coffee etc ! Voltage also dropped to 140 for a bit . New ring . wired up correctly but indicated "reverse " . Could not be possible . Then tested other way and same thing ! Its a luxury apartment and only in there fitting longe plates. Building sparks arrived and fiddled in...
  18. W

    G4 LED's & Aurora AU-LED16T 12v constant 16W LED Driver, does it matter about the polarity ?

    Using these lights (wired in parallel) 6 x 2W is ok to use a 12V constant voltage 16W led driver Aurora AU-LED16T. My question is they are a G4 fitting which goes, either way, does the polarity of the bulb cause an issue or do electronics inside take care of this. Many thanks in advance.
    • woodersd
    • Thread
    • 12v aurora constant driver led led driver led's matter polarity
    • Replies: 4
    • Forum: Lighting Forum
  19. H

    230v 3 pin commando polarity tester

    Is there a 230v 3 pin commando polarity tester that is a reasonable price? I have seen the Martindale one at £45.00 Ideally i would like one about £15.00 /£ 20.00. I am just fixing a socket outside for my camper van to keep the topped up in the winter. The solar panels are ok for the summer. I...
  20. H

    Verifying polarity on radial ccts

    Hi I've got my 2391 assessment at the end of the week and I've managed to confuse myself (and not for the first time) I get how performing R1+R2 and R1+Rn on a ring also confirms polarity. The thing that is confusing me is how does performing only a R1+R2 on a radial socket cct (and operating...
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