what MCBs here?

[mrmisior]

as you been very helpful before I have more questions

what MCBs would suit below described circuits?

1. ring serving 3 heaters, pvc cable in non metallic conduit ref.C, about 25m ring length, live is 2x5mm^2, cpc is 2x1.5mm^2

2. TP serving 1 aircon unit, pvc cable in tray, about 4m length, TP is 1.5mm^2, cpc is 1.5mm^2

3. submain wiring SWA in non metallic conduit, about 30m length, live 6mm^2, cpc 2.5mm^2

 

[telectrix]

without knowing the loading on each circuit, hard to say. going by your cable size, 1. 32A. 2. 16A type c. 3. 40A. assuming cables are suitable for intended use as regards load, volt drop.

 

[Engineer54]

as you been very helpful before I have more questions

what MCBs would suit below described circuits?

1. ring serving 3 heaters, pvc cable in non metallic conduit ref.C, about 25m ring length, live is 2x5mm^2, cpc is 2x1.5mm^2

2. TP serving 1 aircon unit, pvc cable in tray, about 4m length, TP is 1.5mm^2, cpc is 1.5mm^2

3. submain wiring SWA in non metallic conduit, about 30m length, live 6mm^2, cpc 2.5mm^2

Personally i wouldn't use less than a 2.5mm cable, for Air Con units be they wall bangers or split units... Even the smaller 9000BTU units can have a bit of a kick to them on starting...

 

[Wiredspark]

I really don't want to sound like an --- but MrMisior, I think it is extremely LAZY of you to ask this question if you are an electrician. This is extremely basic stuff that you should know. I appreciate that people come here for help when they are stuck, but it looks to me that you just can't be bothered. Not impressed.