Lighting Contactors

[iwire]

Re: Lighting Contactors

Originally posted by augie47:
then there is also the "unlatch" coil which you momnentarily energize to cause the contacts to change.

Ascos have only one coil, it is used for both opening and closing.

For connection you do get a common, open and close terminal. Internal switching makes it work with one coil.

Originally posted by infinity:
I have heard of installations such as this. However I would think that this would violate 700.3 unless that relays were approved for use on emergency systems.

700.3 Equipment Approval.
All equipment shall be approved for use on emergency systems.

Approved is not the same as listed.

Article 100

Approved. Acceptable to the authority having jurisdiction.

I am sure the RIBs would be approved if the lights they control come on when the RIB fails. In other words wired normally closed.

[ November 13, 2005, 07:56 AM: Message edited by: iwire ]