12 Channel relay to lighting

Discussion in 'C-Bus Wired Hardware' started by lennyb, May 5, 2014.

  1. lennyb

    lennyb

    Joined:
    Feb 25, 2013
    Messages:
    41
    Likes Received:
    0
    Location:
    UK
    Just looking at how to wire some 240v lights to be switched via a relay. Can the 240v feed to the 1A side of the relay be looped from the live into the relay or should it be kept as a separate live feed? I'd loop from each A side to the next to give a live to each of the 10 lighting channels. Channel 12 is a volt free switch so won't have a live feed.
     
    lennyb, May 5, 2014
    #1
  2. lennyb

    znelbok

    Joined:
    Aug 3, 2004
    Messages:
    1,151
    Likes Received:
    17
    Yes, it can. But be aware that the lead in wire will be carrying the full load current of every light when all channels are turned on. Each loop will carry one channel load less.

    Some quick calcs will tell you what size cable will work with this arrangement. You know exactly what is connected.

    Mick
     
    znelbok, May 6, 2014
    #2
  3. lennyb

    lennyb

    Joined:
    Feb 25, 2013
    Messages:
    41
    Likes Received:
    0
    Location:
    UK
    Ok thanks. The lighting loads are mostly LED so very little load, about 250W in total across the entire relay. Worst case, if the LED bulbs were replaced with tungsten 50W bulbs it would still only be about 600W.
     
    lennyb, May 6, 2014
    #3
  4. lennyb

    ashleigh Moderator

    Joined:
    Aug 4, 2004
    Messages:
    2,400
    Likes Received:
    26
    Location:
    Adelaide, South Australia
    Be careful about LED (and compact fluoro) load ratings.

    Check if they are power factor corrected or not.

    Some of these devices have high current peaks in the middle of the half cycles, meaning that you can actually run less of them than you think. Of course the manufacturers know this and provide wonderful high quality data and information to help you in your provisioning. (/sarcoff)
     
    ashleigh, May 11, 2014
    #4
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads

  1. 12 Channel DIN Relay wont talk!!

  2. din rail single channel relay wanted

  3. 12 Channel DIN Rail Relay Unit Outside?

  4. 07-001-1 Use Of C-Bus 4 Channel Change Over Relay With Motors

  5. 07-001-1 Use Of C-Bus 4 Channel Change Over Relay With Motors

  6. How to connect a Single Channel Relay

  7. LED lamps and 4 channel / 8 channel dimmers

  8. Using a two channel relay for single channel ?

Loading...