contactors

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  1. J

    Should I use a contactor or a relay?

    I have to design a unit which utilizes both 24V and 110V for lighting. We will supply these voltages by using a dual type transformer. The 24V will supply an alarm and heat tracing whereas the 110V will supply a lighting circuit. Should I install a contactor or a relay to protect from under...
    • Jay
    • Thread
    • contactor contactors lighting relay supply
    • Replies: 7
    • Forum: UK Electrical Forum
  2. J

    I know nothing about contactors.....

    Contactors.....(and lots of other things) Was hijacking a thread so thought I'd start my own......please feel free to take the pee:drool5: By the way, this isn't for a job I've got lined up, it's just one of the many things I know very little about but would like to learn, So, wiring and...
    • Jonny66
    • Thread
    • contactors knowledge nothing
    • Replies: 26
    • Forum: UK Electrical Forum
  3. N

    Lights and Contactors

    So basically i need to draw circuit diagram for some lights, there are 1200 x 1200 recess modular luminaire it doesn't say the wattage so i can choose whichever, what i want to know is is it ok for them all to be controlled by one switch or will i need to add a contactor? and also whats the...
  4. R

    transformer design using relay and contactors

    ok,lets say the transformer getting input voltages 380-400-440-480-660-690 V and out put is 230-440 v,the tappings provided for the incoming voltages but the incoming will be the same connection either it can be of any voltages,how can it be done by the use of relay and contactors for different...
  5. M

    Lighting contactors

    Hi all I'm trying to get my head around contactors. I understand how they work and what they are just finding the wiring a little hard I know the coils are on a1 and a2 which is the control circuit. So do you have the supply coming in to the top terminals and the load to the light going out...
  6. A

    Relays and Contactors

    Hey, I don't quite understand Relays and Contactors previously ive worked for a company and if we ever needed a contactor they just said heres a contactor wire it (For example we used contactors for the air conditioning switching) I know how to wire them and that but i dont UNDERSTAND why they...
  7. E

    Where can i find a 100A/63A change over relay/contractor????

    Anyone know where can i find a 100A/63A change over relay/contractor???? hears a little diagram so you know what im after
    • energizedelec
    • Thread
    • change contactors normally power relay switch where
    • Replies: 5
    • Forum: UK Electrical Forum
  8. F

    relay or contactor

    Hello need some advice wiring up electric AGA via honeywell 1 channel timer. need to use low amp to switch higher amp do I need a contactor or a relay? all at 230v want to protect honeywell timer on 3 amp fuse but switch over 16 amp circuit. Any help advise would be good thanks
  9. T

    out of the game for 2yrs....thoughts wanted!!!!

    Hello to all Just wanted your thoughts really,well im an electrician with 10yrsexperience but worried getting back into the mix.Come out of the trade for a while due to personal reasons,ive got my C&G parts 1,2 and 16th edition,due to do my 17th in a couple of weeks. My concern is that i have...
    • troyboy73
    • Thread
    • contactors experience game out really wanted working
    • Replies: 5
    • Forum: UK Electrical Forum
  10. T

    Contactor, Timer Circuit Design HELP!

    I have a question. Basically I have been asked to install electrical heaters in a large area and the customer wants them timed and on thermostatic controls. Which is fine you can just buy the plug in's right? Bloody hell their expensive! I haven't played with contactors and din rail timers...
    • tennis ball
    • Thread
    • circuit contactor contactors design help! output timer timers
    • Replies: 31
    • Forum: UK Electrical Forum
  11. La Poste

    Contactors vs relays.

    Does anyone know why contactors are more expensive than relays? In my mind they do the same thing in fact relays do more (IE normally on/ normally off terminals) so why the difference in price IE contactors are more expensive, I don't get it. Thanks.
  12. R

    industrial roller shutter door.

    A friend of mine has a 3phase roller door. Under normal circumstances you press the up button and it opens and continues to go up untill the limiter switch kicks in. When it comes down you have to press and hold the down button. I guess this is for safety reasons. The up button has stopped...
    • Robo
    • Thread
    • aus button check contactor contactors door industrial roller shutter these
    • Replies: 22
    • Forum: Australia
  13. 4

    For sale: Newlec Enclosed Contactors Type NLCONP

    4 off units, 4 pole 45A 230v coils. enclosures are IP65. Dimentions (mm): 140x220x140. Part Number: NLCONP45/4N £35.00 each
  14. G

    New and used 3 phase contactors and motor control equipment

    Hi everyone, is there a market for old and new motor equipment, contactors etc.... I am ripping tons out and upgrading motors and pump running equipment and wondering if the old stuff is worth hanging on to. Any thoughts let me know ??? Cheers
    • gelgel010297
    • Thread
    • 3 phase contactors control equipment motor new phase
    • Replies: 0
    • Forum: For Sale and Wanted Forum
  15. D

    Emergency lighting key switch

    Is there any reg on emergency lighting should be on a key switch in bs7671, I know of it coming up in bs5266.
  16. E

    Contactor for lighting and Last Man Out Switch

    Hi, looking for some alternative views on this. Need to fit a contactor and last man out switch for a large house with 2 consumer units, each controlling roughly half of the house. They are fed from 2 separate phases from the 3 phase board. The last man out switch will be by the front door...
    • edrobbo8
    • Thread
    • aus circuits contactor contactors front lighting out switch
    • Replies: 4
    • Forum: Australia
  17. cliffed

    contactors

    jus a quickie,gotta connect a load of lightin contactors,controlled by various pirs etc,now is it ok to take supplies & load only into the contactor,& of course a switched live/neutral 4 the coil.Reason being 2 limit lotta cables enterin the enclosure of a 20amp contactor.Thinkin out loud, seen...
  18. M

    Solar Company Looking For MCS accredited Sub Contactors

    Hi all, We are currently looking for sub contractors to undertake work mainly in the south of England, after a very busy and successful stint at the Earl's Court Ideal Home Show we have received a large amount of orders that our own internal install team would struggle to fulfill in an...
  19. G

    Lighting with contactors and Emergency lighting wiring

    Hi, As part of my college project I have to design the electrical system for a supermarket. The florescent lights are switched using contactors. These contactors will be switched by a bank of switches at the entrance to the premises and the contactors will switch on the lights when switched...
    • gerard
    • Thread
    • aus contactors emergency emergency lighting lighting wiring
    • Replies: 15
    • Forum: Australia
  20. S

    Fitting dol contactor for 415 v3 phase fans

    I have to fit dol contactor for 415v 3phase fans where the contactor must switch at 110volt how is this done please.
    • seadog60
    • Thread
    • 415 canada contactor contactors control dol fans fitting phase switch voltage
    • Replies: 25
    • Forum: Canada

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