500VA Toroid - Relay or Contactor?

[routercnc]

Here's a question for the gang, though. Like a lot of small contactors, this is designed to handle 3-phase and therefore has 3 main N/O contacts. If you are using it on single phase, would you just use one contact, wire all three in parallel, or all three in series?

If I understand the question I connected live and neutral (brown and blue) to the contactor so they were both switched. See second photo in post #102. Earth was permanently connected elsewhere. I controlled the switching using 24V DC logic (white wires) from the estop circuit
http://www.mycncuk.com/threads/6988-...cnc_MK3/page11