The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Switched neutral

Looking at the BS7671 AMD2 out for consultation, I noticed clause 463.1.2. This shows an arrangement whereby the control device for a lighting circuit is switched by a switch on the neutral side of the device.

Clearly this works but why would anyone want to do this?
Parents
  • So the only the contactor and the lamp need a live supply. It is also how a lot of E7 meter switching is organised.

    And we do it for electronic switches so that the driver electronics can be at or within  half a dozen volts of neutral potential, rather than always live. Better for things like photocells outdoors.
Reply
  • So the only the contactor and the lamp need a live supply. It is also how a lot of E7 meter switching is organised.

    And we do it for electronic switches so that the driver electronics can be at or within  half a dozen volts of neutral potential, rather than always live. Better for things like photocells outdoors.
Children
No Data