Sub main cable type

[Des 56]

So my question is *would a 100mA RCD up front provide sufficient protection

If the cable is not mechanically protected or deeper than the magic 50mm then it would have to be 30m/amp for the buried cable
That would be a possible rip it back out value unless the cable is suitable for burial (mmm that last word of mine sounds a little morbid

)

 

[Engineer54]

No not 100%. It had harmonised insulation. From what I gathered YY cable has numbered cores or harmonised colours instead. The sheath must have been 6mm thick at it's thinnest part. Sheath was light grey and spending an hour googling earlier led me to the YY. Strands on the conductors were very fine which made the csa look tiny.

I am gonna go back and have another butchers.....bet it is just flex afterall!

I wouldn't mind betting that at all either!! I also bet that on those shop installs, not a single crimp ferrule was seen either?? lol!!

 

[shanky887614]

No not 100%. It had harmonised insulation. From what I gathered YY cable has numbered cores or harmonised colours instead. The sheath must have been 6mm thick at it's thinnest part. Sheath was light grey and spending an hour googling earlier led me to the YY. Strands on the conductors were very fine which made the csa look tiny.

I am gonna go back and have another butchers.....bet it is just flex afterall!

Sounds like yy were the core colours

Red, white etc

Or black with numbers in white?

 

[guest119]

It sounds like nornal everyday 16mm YY, harmonised.
You can order it coloured cores or numbered.
16mm can be found in many supermarket bakeries feeding the ovens from bus bar it the ceiling or feeding lighting bus bars in the main sales areas etc etc.

Boydy

 

[Engineer54]

It sounds like nornal everyday 16mm YY, harmonised.
You can order it coloured cores or numbered.
16mm can be found in many supermarket bakeries feeding the ovens from bus bar in the ceiling or feeding lighting bus bars in the main sales areas etc etc.

Boydy

No different from a cooker being fed from a 45A cooker control switch!!

Feeding a general area lighting busbar system is another kettle of fish, in my book. ...As i said, it wouldn't happen on any of my projects, not in any way, shape, or form!! lol!!

 

[NDG Elecs]

Just a quick update for anyone interested.

Managed to inspect the cable properly today. Cable has no extra protection and snakes all over the place. Certainly wouldn't wanna be putting any shelves up! Defo YY 16mm harmonised. Told client the bad news and he seemed ok with my proposal to replace it. So happy days!

Thank you all for ya help

 

[Knobhead]

Good outcome for you.

And a bit of scrap for the drinks fund.