switching

  1. C

    parallel conductors and neutral switching of through contactors in lighting circuits

    Hi guys, I have come across two problems today well acutely three so I will list them first.. 1st Testing a 4mm radial circuit today or so I thought! I asked the young lad to go to the end of line and take an r1+r2 reading. When he opened up the last point he said that there were four 2.5...
  2. B

    Switching coil and relays

    Hi all a couple of questions will a 24volt dc supply switch in a coil rated for 48volts dc. If so would it be safe. Also how much voltage can a 24volt relay take could it take 48volts or will it blow the relay? Thanks trig
  3. M

    Volt Free Switching

    Can someone offer me some guidance. I am wanting to keep the switching pair on two zone valves aswell as the switching pairs in a time clock volt free. Mainly so that 230V isnt flying around different wiring centres. Is there a way I can have volt free switching to pull a relay of some sort...
    • mstoker1990
    • Thread
    • free switch switching volt volts
    • Replies: 6
    • Forum: UK Electrical Forum
  4. R

    course soon hv switching

    hi folks, i am about to go on an HV switching course, as a bit of a warm up, i have been given a HV Switching schedue to write. Does anyone know where i can find some info online for this as i am very new to HV operations? as a headsup?
  5. A

    Individual pir fluorescent pir

    Hi guys Went to see a job today in a block of flats. It has 60 5ft fluorescent double tubes on 24/7. As you can imagine the owner had a heart attack when he got the bill. The stairways and entrances are to be kept on permanently but the lights leading to the flats he wants to be pir...
    • amo
    • Thread
    • fitting fittings fluorescent lights pir sensors switching
    • Replies: 9
    • Forum: UK Electrical Forum
  6. joel89

    PIR Switching

    I've got lights under my extension, I want to switch from either end with 2 PIrs can I just parallel the switch lives from either PIR or can you only have one PIR... Ps im in an industrail spark not a house basher
  7. W

    24v at switched side of room stat (230v) possible backfeed ?

    hi all, having an issue at work where the heating wont turn off. wiring is all ok and been tested, the stat is switching fine although it is reading 24v at the switched live at the stat when its turned down which im thinking is a backfeed from the boiler of some kind. Have replaced a few stats...
    • weep
    • Thread
    • 230v 24v backfeed boiler possible programmer room switch switched switching voltage wiring
    • Replies: 29
    • Forum: Central Heating Systems
  8. T

    switching LED strip lights

    The wife is requesting LED lights under the bed, its all wired in to the light switch by the door as she did not want a remote control, I was just wondering what people thought about switching a transformer this way ( chopping of the plug or swapping for a round pin one ) or using an LED driver...
    • tommysmith
    • Thread
    • led led strip led strip lights lighting lights strip strip lights switch switching
    • Replies: 11
    • Forum: UK Electrical Forum
  9. E

    Re: Extra Low volt switching for lighting

    Re: Extra Low volt switching for lighting What regulations are there for extra low voltage controlled 12 Volt lighting. Also are there regs for any type of low volt DC switching from 12 volt battery (solar charged) off-grid LED lighting ? The control unit is home brew with infra red handheld...
  10. M

    Ideas for PIR / time clock switching

    Hi, I'm after some ideas for the best way to do this - A client wants his office lighting to be on PIR's (I think it's to lower his carbon footprint) but he has also added he wants them on time clocks say from 8am until 7pm then to go to PIR incase anyone works late. The office is wired in...
  11. E

    emergency light switching

    Got a corridor lighting problem with a non maintained e/light at the end which loses power when the 2 way switch turns all the lights off, thus bringing the light into emergency mode when all other lights are switched off. There is a 2way switch at one end with a key switch next to it. The...
  12. C

    wireless switching

    Hello i have a son who has special needs and needs help playing with his toys, To enable him to use his toys i have rewired the toys switch to a big button type switch which he can press more easily (see attached pic) Now what I would like to do is make the switch wireless so there's no...
  13. A

    Can towel radiator be upgraded just by switching element?

    A client has a Dimplex TRS120 oil-filled 120W electrical towel rail. The element has packed up and before it's replaced I wanted to check whether the 120W element could simply be replaced with a higher wattage one, e.g. 175W (TR8404), as listed in the Dimplex spares brochure, a couple of lines...
    • adown
    • Thread
    • dimplex element higher radiator replaced switch switching towel
    • Replies: 2
    • Forum: UK Electrical Forum
  14. W

    two way light switching

    my son has just moved into a new house and has asked me to have a look at a problem with his lounge lights. his lounge has a switch on one side of the room (call it main switch) and on the other side is a double switch. one switch is the downstairs switch for the landing light which works fine...
    • wobblymike
    • Thread
    • black common light lounge other slave switch switching two way
    • Replies: 1
    • Forum: DIY Electrical Advice
  15. P

    Sequential or random switching

    I have a rainwater harvesting system with three tanks each with a separate pump. I will have a pressure vessel and pressure switch to automatically start pumping when water is required. However, I do not want to run all three pumps together but one at a time. I need a switch which will ensure...
    • Paul2011
    • Thread
    • pumps random switch switching three
    • Replies: 39
    • Forum: UK Electrical Forum
  16. D

    neutral switching of lights

    Hi all My niece has just bought a house so asked me check over electrics etc, from a visual was a new flurecent light in itc as tube was going and tatty (she bought it to rent out).so on fitting the lights I notices it was neutral switching. On further investigation the whole house and looks...
    • davek
    • Thread
    • lighting lights neutral switch switching
    • Replies: 18
    • Forum: UK Electrical Forum
  17. S

    3 plate switching

    Hi guys, I've been a trainee electrician for nearly two years, working only on new builds. a friend of mine has just moved in to a new house and has asked me to do a few little jobs for him before the plasterer comes in. He wants me to add a security light to the back of his house, however all...
    • Sparky parky
    • Thread
    • earth light lighting permanent plate security switch switching
    • Replies: 18
    • Forum: UK Electrical Forum
  18. R

    PLC switching

    If you wanted to use an output of a PLC to start a DOL motor, would the PLC output power be used to energise the coil on the contactor at 110v,
  19. E

    2way switching and intermediate conundrum

    Good evening all im in a bit of a pickle. I've wired 2way switching that controls 4 sets of lights from 4 different points. Basically 4g switch on each floor. ive some how really confused myself. I'm having to change some of the modules as intermediate works out in different location for one...
    • egginyourface
    • Thread
    • 2way common first intermediate strappers switch switches switching
    • Replies: 32
    • Forum: UK Electrical Forum
  20. B

    Using rotary isolators for switching loads on and off?

    Hi Can you use rotary isolators to switch resistive loads on and off on a regular basis (talking 18KW load here) I personally thought not, that it should be controlled through a contactor but I have seen another installation that is using isolators thx Bigfoots
    • bigfoots
    • Thread
    • different isolator isolators loads rating rotary switch switching using
    • Replies: 2
    • Forum: UK Electrical Forum
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