polarity | Page 4

polarity

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  1. the pict

    drill batteries

    Any one heard of the way to rejuvenate Nicad batteries or is it just stories P
  2. B

    Who can work out this one!!

    Ok here is a fault I discovered today which is a bit of a headscratcher Was called to a house today to look at problem with upstairs sockets, the customer was saying that they were working intermittently so first thing I did was get the volt stick out for a quick check. There was one socket...
  3. beatboaby924y

    polarity of e14 and e27 lamp holders

    In GN3 (2.7.12) it states polarity must be checked at the centre contact of screw type lampholders except E14 and E27. Anyone know why? Thanks in advance.
  4. E

    does anyone own a fluke T140?

    can it detect polarity?
  5. J

    Help! Polarity confirmation!

    I have to wire a ballast for a 8w fluorescent tube. Now What side does the neutral go and what side does the line go in, there is just a sinewave symbol but no "L or N" ? From learning alternating current theory at college and being a practicing electrician for the past 3 years I should know...
  6. T

    Immersion Heater Element Fault....Help Please

    Hello. Ive just got back off a job, I narrowed it down to the immersion heater element causing a b16 60898 mcb to trip. I disconnected the thermostat to see if that was causing the problem first which in this case it was'nt. I then put the terminals straight on to the element terminals to...
  7. O

    polarity argument at work

    What do use in emergency lighting brown permanent live black switch live or black permanent live brown switch live obviously grey neutral major arguments at work please help to settle
  8. G

    Samil Solarlake- what is 'ISO'?

    Hi all, FIRST POST, yay. The problem I have is a 17000tl that will not work because the device shows 'ISO' is falling below 1000. Samil have a UK tech guy. He started last week, I had him on site today, a good guy, willing to help and learn but neither he nor I no what 'ISO' is or what it's...
  9. J

    Resistance bewteen circuits

    I just wondered why i would get a reading of 1400 - 1800ohms between lives on 2 different circuits one being a new circuit installed about a month ago by an other spark, the only reason i check was two ring mains that had been put into one mcb by the last sparks and told the customer he need a...
  10. G

    240v between neutral and earth??

    Just recently bought a house and been looking at the electrics making sure it is all right. The property has a conservatory on the back and a light which doesnt work. When I measured between live and neutral I got 0v so went back to the switch. Here i also got 0v. Went to measure between earth...
  11. P

    polarity testing

    hi guys, could do with some help. I undetand how to do my polairy testing on a normaly circuit. e.g lighting circuit. but how do you do polarity testing of the incoming supply? thanks
  12. B

    Reverse Polarity

    Hi all, I have a question reguarding reverse polarity! Does it have a detrimental effect on the current circuit? For example, if you put a different branded battery in a makita radio and it worked fine but you had to turn the battery upside down for it to fit, would this harm the radio as the...
  13. P

    polarity testing

    hi guys, when testing to confirm polarity of swa going from house to outbuilding. a. why is it necessary b. why is it carried out before the installation is energised
  14. M

    Quick question! - polarity

    Hi all, Just require a little clarification on polarity, may be an easy answer but i'm still learnig! I was doing my 2330 303 fault finding exam, i got to the ring final for continuity, I tested little r1 r2 and rn, found there was no continuity on the cpc, noted it as a c2 and stated further...
  15. F

    wrong polarity on led strip light

    might be answering my own question here if you have wrong polarity on a strip light the lamp will still work so we are in the process of changing these to led strip light (flurocents this is ) were the lamp is 18w 75v dc you only have to wire one end of tube but if you get the wrong polarity it...
  16. N

    How to carry out polarity test on Shower, electric Fan, and motor?

    Hi During polarity check on the motor, fan, and shower. Do we use R1+R2 method but instead of putting the switch On we turn off the appliance switch? What reading should we get? is it open circuit reading? if so what reading is expected? Many Thanks.
  17. F

    wrong polarity

    carrying on our eicr from last week in office block we found wrong polarity in small workshop on ring main i no unreal but question it looks like maintenace guys have been using appliances but surely the breaker would trip as soon as a load was put on to this wrong polarity ring main we have...
  18. F

    wrong polarity

    doing eicr at weekend in large office block on lighting circuts assisted by a keen apprentice we found that on the lighting circuts we found wrong polarity with L AND n we have a t&e cable supplying a delmatic control box and then plug and play leads daisy chained any way found problem L AND N...
  19. C

    Reverse polarity on sanyo panels

    Hi all A customer ive quoted recently wants panasonic HIT panels as part of the system and ive never fitted these before, on segens website it says dont reverse the palarity on multible string otherwise you'll destroy the panels, so im a bit reluctunt to fit them as there not the cheepest...
  20. N

    Question regarding dead polarity test. Please Help.

    Hi I am bit unsure when carrying out dead polarity test on a one way switch and two way switch. Where do the test probes go and on what? Do we make contact at the switch line and the cpc of a ceiling rose? or do we contact at the line and cpc at ceiling rose? What happens in two way switch...

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