On 15/03/2018 21:02, trader_4 wrote:
On Thursday, March 15, 2018 at 10:21:35 AM UTC-4, wrote:
Oumati Asami wrote:
How does this circuit work?
This house has 3 phase power.
I was replacing a downlight and found it having two black, two neutral,
and one blue incoming wire.
If the light switch was on, the blue wire was energized.
If the ceiling fan was on, one of the incoming black wire was energized.
Why/how do both light and fan work when both are on?

incoming downlight
a) ================(black)------------------
b) ================(neutral)----------------
c) ----------------(blue)------------------


Knowing which country you reside in would help. ^_^


I didn't think it matters. I'm in Myanmar if this helps.


Translating 'downlight' into common English is a start. I assume you are
talking about a switch rather than a small, recessed spotlight. Assuming
the switch is configured so both black and blue are hot in one position,
why wouldn't they both work?


.... it has a fan .. and a light.

https://www.1000bulbs.com/pdf/fanima...stallation.pdf

John T.

That's what I understood it to be too.
And it has more that enough wires to run both. All you need is two switched
hots, a neutral and ground. So, I still don't understand what the
question about how both the light and fan can work at the same time is
all about.
issue is.


The light is a recessed down light on the ceiling. Sorry. When I post,
it did not occur to me that some ceiling fans had built-in lights.