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contactor

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  1. J

    recommendation for time controller to operate a contactor

    Hello hello, Wondering if anyone can recommend a timer to control a small contactor please. This is an existing job where the existing timer keeps playing up, I've replaced it once before. The 3 phase contactor it controls is switching some heaters in a hall. The existing timer is a Timeguard...
  2. A

    2 17A Heat Mats Through Contactor

    Hi, I need to install 2 separate underfloor heat mats both rated at 17A on individual 20A breakers. The heatmat controls are rated at 16A so I think it would have to go through a contactor right? I can install an enclosure in a cupboard for the contactors but would I have to use 2 x 1 pole...
  3. O

    GET GHACR - not responding to switch - blue flashing light

    OK, cards on table - I don't know much about these devices but got a call to look at one today... So 4 way switch by door, 4 x 3 rows of lights, rows 1 to 3 inclusive all "working OK" 4th row stays on and is not responding to on/off or dimmer function at door switch. Suggestios...
  4. A

    Timer and contactor

    Hello, a friend has asked me to install a few 20W LED fittings on his out houses working off a timer, there are already some lights form a board with a timer in it. i have looked at the wiring but am wondering how the wiring works for the timer,and the timer. the lights are down a drive and at...
  5. S

    Contactors & Relays

    Hi We have recently installed a PV system that needs to be switched when a generator starts. The generator control panel has a VFC (240V/5A) we can use to signal the contactor. There is a 150m run to the PV supply I need to isolate. I was planning to use a 40A contactor to isolate, however...
  6. K

    2 Lighting circuits through a contactor

    Hi, On Monday I have to wire 12 lights on 2 circuits through a contactor. 6 of the lights will be switch from one switch and 6 from another also near the exit to the building there will be a "Last man out switch" by turning that off I need to switch all 12 lights off. I have never wired a...
  7. S

    Contactor Query

    Hi guys came across this today and it puzzled me slightly, it's a contactor for an extraction fan in the roof of a factory bay. The white cable on your right goes up to a thermostat which appears to control the relay on the right which appears to control the contactor, just wondering why you'd...
  8. uksparks

    12v Relay

    Hi, I think I asked this before, but have a 12v alarm output that I want to switch a 230v load. Can you get a din rail mounted relay or Contactor?
  9. D

    problems with lighting contactor

    Hello guys. This is my first post on any forum so please go easy on me. Thanks in advance for any help. I'm a domestic electrician and so never have to deal with contactors but I'm doing a job for a friend of a friend and the lighting contactor ( Ac...
  10. M

    Contactor wiring ?

    Evening all, can one of the Guru's of the forum help me please ? I have been watching my mentor wiring up UFH the past couple of days, and now its my turn in the morning :ack2: under his supervision. I have taken it upon my self to get a head start and was wondering if this proposed diagram...
  11. S

    Indicators in parallel with contactor coils

    Am I right in thinking it is bad practice to wire indicators in parallel with contactor coils? If so, why? Thanks
  12. S

    Contactor

    Hi all, Trying to get my head around contractors. I get the theory but not sure when it comes to actually wiring the thing up. So...three Phase lighting circuit using a contractor wired in singles. One light on each phase with all lights controlled by the same two way switching. Where I get...
  13. S

    Contactor advice

    Hi all, First of all i haven't much experience with contactors, I need to install a timer to switch 3 discharge lamps. I vaguely remember from my training that contactors should be used when using a timer unit to switch discharge lighting, as timer contacts will burn out when switching the...
  14. A

    LED Lighting through 20a single module contactor

    Hi All. Does anyone here have experience with the following. Contactor is buzzing loudly when energised. The contactor is feeding banks of LED light banks. Do you know if LED lights have to be de-rated for use with contactors? Thanks
  15. R

    Help with wiring up a contactor and stop switch to a VFD

    Morning, I'm building a small control panel for a VFD, The VFD has 24v lines for motor run and stop, these use a momentary switch. The stop button provides a braking function for the motor through the VFD. I want to connect a contactor between the VFD and motor to safely isolate the motor. I...
  16. londonfire

    Replacing an obsolete contactor.

    Good evening gentlemen. I went out yesterday to look at a lighting circuit in an underground garage that is not working. Turns out the contactor is shot. Its a brook Crompton hr1710 that is listed as an obsolete part. I was looking for opinions on looking for a like for like replacement...
  17. K

    Wireless Contactor for PV and Standby Generator

    Hi, anyone got any idea on pricing and a supplier for a wireless contactor. Basically I need to disconnect the pv on loss of grid prior to the generator kicking in. Unfortunately i'm unable to connect on the grid side of the generator set without digging up a trench. Thanks.
  18. S

    RCD trip out

    I've been called to a job for a friend as his swimming pool pump keep tripping the RCD, it took me a while to work out how the other electrician had wired it but of what I see, it's a bit of a mess. I'll do my best to explain for the pool I can see 3 MCB's used 1st is a 6A type b in to a time...
  19. C

    3 phase motor star delta staring controls

    Hi guys with the star delta motor starting controls I know you have 3 contractors, the main, the star & then delta. The star contractor is looped out as star configuration at the top but I cannot see how the delta contractor is configured in delta, it just looks like a standard contractor to me...
  20. G

    4 Pole Contactor

    I need to wire up 7 water heaters in an office building and the client wants the water heaters to switch off at 5pm when the office closes and switch back on at 7am just before the office opens in the morning.... Can I use a electromechanical timeswitch to operate 2 x 4 pole contactors mounted...

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