Installing downlights

[Murdochcat]

The only place those cheap and nasty LED panels should be are a garage or a shed

And if you do choose down lights do not fit sealed units as they are nasty and bad for the planet

 

[yartin]

Really? Here you claimed to be an Electrical Engineer. '
Yartin said
"Hi
I am not electrician, I am electrical engineer used to voltmeters, multimeters and oscilloscopes."

Yes electrical engineer not a domestic electrician, they are very different. FYI Electrical engineering has four main branches which are Power electrics, Communication, Micro Electronics and Control Engineering which is my profession. Usually one will be specialised in one of these four. Without going into technical details beyond the scope of the forum; Power electrics is the nearest to domestic electrician.
I don't have experience in the building industry, always learning as a DIYer. Thing like locating joist, lifting floorboards, using the right connectors and JBs, cable diameters, lighting and ring circuits......

 

[yartin]

The only place those cheap and nasty LED panels should be are a garage or a shed

I think they look good in hallways and may be bathrooms too.
They are much better than downlights where you have to drill so many holes in ceilings, so many cables and maintenance issues.

 

[yartin]

However,
that was in

Pen non contact tester V multimeter

Hi I am not electrician, I am electrical engineer used to voltmeters, multimeters and oscilloscopes. I do DIY work in my home only, have always used multimeter. I have seen pen testers; much easier to use and planning to purchase the Lap from SF. I have hired electricians to do work in my...

www.diynot.com

(You should have posted the "Link")

No idea what you on about.
I have been using multimeter, so thought to ask what a pen tester is about, a member mentioned voltage tester is used by pro electricians, I looked at and seems voltage testers are geared for domestic electricians, it does much less than multimeter but voltages and continuity is all needed makes it ideal.

 

[Jurassicspark]

To trace cables, I took a floorboard on first floor which is just above the light; pic attached.

Just a suggestion. You could have just unscrewed the cover of that fitting and that would have shown you what arrangement it is. Whether if its supplied by a junction box, switch, first on the circuit, last on the circuit, or simply in between multiple of lights which are just daisy chained together.

Am I right to say one of the cables marked C1 and C2 are loop and the other is switch line?

How did you trace the cables?

Also am I right to say this ceiling light is the last one in this lighting circuit as there is no loop cable coming out to go to another?

Probably yes.

Although not always.

 

[yartin]

Just a suggestion. You could have just unscrewed the cover of that fitting and that would have shown you what arrangement it is. Whether if its supplied by a junction box, switch, first on the circuit, last on the circuit, or simply in between multiple of lights which are just daisy chained together.

Just a suggestion; you could have read my first post, the intention is/was to install number of downlights so wanted to learn how to locate joist, how to carefully cut floorboards with multitool and check the live feed and the feasibility of the project, ie: investigative work.

How did you trace the cables?

I used common sense, every light turned On and Off from a switch should have at least 2 cables, one is called live feed cable and the other is usually called line cable. Guess what; there were only 2 cables which makes life easy. I have also attached a schematic circuit diagram below where you can see the feed form mains supply L & N , on/off switch and a light (coil) and C1 (live feed) and C2 (line) are the cables am referring to.

Hope this helped.

 

[Murdochcat]

They are much better than downlights where you have to drill so many holes in ceilings, so many cables and maintenance issues.

Maintenance issues are due to nasty sealed led down lights.

Ones with customer changeable bulbs are better for you, your pocket and your ceiling

 

[SUNRAY]

Control Engineering which is my profession.

What sort of work do you do in this genre?