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contactor

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  1. R

    Ufh contactor wiring advice please

    Evening all, Doing a bit of forward planning for an extension with possible electric ufh. i Have worked out room will need 25m2 split between 2 matts 15 and a 10. 150w per square meter matts. I work out as about 16.3 amps in total. Only one stat so a contractorwill have to be fitted.. if...
  2. S

    Star Delta Starter, Blowing Contactor

    Hi there, I got a call to a job, table saw (wood) tripping C/B straight away. 4kW motor on Star Delta Starter. So I get to the job, after some investigation I find that the main contactor is welded shut and there is a phase to phase short circuit, I find that the motor tails to the windings...
  3. Bloc1030

    Wiring a contactor for photocell and twist timer control

    I have a contactor that I will be using to control various exterior lights. I want them to come on and night and go off during the day so I will be using a photocell for that control. I also want to be able to test these lights without actually having to go out and put tape over the photocell...
  4. I

    Contactor Ratings

    Afternoon all, If a contactor has a rated operational current of 40A but a maximum power rating of 6kW, will this be acceptable to switch an air con unit (recommended fuse size 32A, max running amps 13A) MCB? Thanks.
  5. D

    Packard C240A contactor wiring

    When my a/c contactor goes out, it would be vastly cheaper to just replace my Packard C240A contactor with a new one. I could just sub the new one in, being careful to wire it like the old one was wired. But it would be handy to have a wiring diagram/pinout for the C240A. Can anyone point to...
  6. Hill Top

    Compressor contactor trips

    blessed day all, i have a 3PH,15HP, RPM-1775, V-230/460, AMP 37.1 Motor. Compressor Starter rating of 460VAC/ 15HP/3PH , why it keep tripping???
  7. P

    Can I power 2 x 3kw immersion heaters from a single 3 phase contactor?

    Is it ok/advisable/legal to power 2 immersion heaters (both in the same cylinder) from a single 3-phase contactor? I need to connec
  8. F

    Reversing contactor wiring.

    Hello all. Hope you are well. Can anyone please explain why there is a SINGLE black wire linking both sides of line 3 on this reversing contactor? It runs a 400v 3 phase AC motor on a conveyor transfer unit, Left side is forward, right is reverse. I have posted a picture of what i thought the...
  9. M

    Contactor to DOL starter & switches

    I have a DOL starter (https://docs.rs-online.com/c08c/0900766b81586106.pdf for reference) that I want to connect to my ac motor. I understand that the dol starter has a built-in contactor. I want to connect two other switches, a tilt and a proximity switch. Is it possible to connect these two...
  10. Designmen90

    Contactor for lighting - 8NO contacts

    Hello everyone, here I have a situation where I need contactor with 8NO (normaly open) contacts. I found some Schrack device, mini contactor LA100773. LINK: Mini Contactor 4NO, 3A, 230VAC - Online Shop - Schrack Technik International -...
  11. V

    Contactor for outside lights on a PIR - Opinion requested

    Hi I wondered what opinions would be on the following. I have installed 2 20W LED floodlights which will be controlled by a PIR and a 3 position switch to override the function of the PIR. The manual of the PIR seems to imply that if it used to control more than one light it should be via a...
  12. D

    Contactor required for timer or not...?

    Afternoon all, I have a customer that requires three 6a lighting circuits to power down in their domestic property for one day (Saturday) every week without touching any switches. Whilst I am trying to adhere to their requirements, they feel that they need a contactor in order to manage the...
  13. E

    Big contactor

    Well guys , I have been looking at a big contactor for a power factor unit which is buzzing mad and causing a lot of vibration/noise to adjacent containment So I opened up the front end and to me the contacts have a lot of wear from loading as you will see on attached images . Would you agree...
  14. EastCoastPete

    Contactor for Heating Radial

    Hello All, I've a 1 bedroom flat installation. All standard but the customer will AirBB it and wants a master switch to encourage guests to turn off the (3x 1Kw) wall heaters when they leave. I'm thinking 16A contactor, any good /bad makes or takes on this route? Thanks, Pete
  15. B

    220 Volt single phase Contactor relay controlled by 2 switches

    Hi, I am looking for help wiring a 220 Volt single phase Contactor relay that has a single A1 Coil terminal to be used with 2 float switches to control a pump. I know how to connect a single switch to the relay but unsure how to add the second switch. Each switch can be Normally open or...
  16. A

    UK Cu change with intergrated contactor

    Hi all, I've just been to a flat with the old double stack mem cu which includes an old 63 a contactor for the storage heaters. Looks like contractor is getting very warm over time and the board could do with an upgrade. Anyone had to do similar and if so can recommend a good brand? I'm guessing...
  17. B

    Contactor for outside heaters

    Hi looking for some advice, looking to put some outside heaters (in my garden) 2 x 2500w, now I want a time delay switch but this can only switch 16A, so I’m looking at putting a contactor in as I already have one, but I’ve only ever used contactors twice before, is this the best way to set up...
  18. S

    Looking for contactor that fits in single box

    Afternoon all, As title suggests I’m not sure if such a product exists but I’m looking for a 20amp contactor that is mounted into a single box/patress Reason being another sparks has wired 2 ufh mats 1800w each onto a single spur (14-16amp)
  19. C

    (diy)Do I need a contactor?

    Hi all, I'm building a small, home tanning bed. I finally have a staircase timer which works. It's rated at 16amps. I'm using 10 x 160watt lamps. There is an electronic ballast for each lamp. The ballasts are rated at 1 amp AC 230V output current. Do I need a contactor? The timer...
  20. M

    Do I need a 415v coil contactor?

    Hi guys, first post on here so hope it doesn’t sound too dull. I’ve recently qualified but my background is domestic...recently started with a company working in commercial so haven’t had much experience in working with contactors. But basically I’ve got 3 rows of lights that need to be...

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