Reg number?

[Murdoch]

So does that mean all CUs need a lockable lid OR only if the CU contains moody blanks?

that’s just nonsense what  they’ve written in the best practice guide.

 Missing blanks = C2

 nothing else is appropriate

 what is a moody blank? Is that one with a sad face emoji on it?

 

[binky]

to be frank I wouldn't give it a C3, just make  a note on cert. that the board isn't metal.  I've never seen a  fire in an understairs cupboard or heard of one, and as you are in there testing, then part of the remit is to check the tightness of all connections, so if they are all good, there is a very trivial chance of a fire.

 

[Evans Electric]

So does that mean all CUs need a lockable lid OR only if the CU contains moody blanks?

Imagine this scenario :-  

Theres an emergency..say a fire ..Trumpton  are rolling  out their  hoses  ....need to switch off electrics .....Don't panic ! don't panic!! ....the board is locked and the key  has disappeared .    

The only locked boards I remember were in a mental hospital  .  

 

[Andy™]

they have their own key. usually in the form of a hammer or crow bar

 

[SPECIAL LOCATION]

I think the "without a lockable lid" bit, refers to the cover you have to remove to connect cables & access live parts..

Not the little flappy lid that covers access the user-operable MCB's / RCD's etc..

e.g. 

We must have all seen fuse boxes with covers that may be on..

but have missing / broken fixings screws for the lid/cover...

So anyone could pull it off!

Basically you must need a tool to get inside the unit...

If lid is not secure.. or blanks are missing..

then fingers / hands can get inside.

Which is why they suggest a C2...

No cover at all  C1

Cover that can be removed without tool C2

A main switch (& MCBs /RCD's / RCBO's)  Must be accessible for use by ordinary people.

462.1.201 

Its the last few words..

"with possible access to live parts" that is the key to what they are trying to say..

Guinness

 

[Geoff1946]

what they are trying to say..

I suggest that any technical guide where you have to guess what the author intended to mean is best used for stopping a table wobbling or similar.

 

[Murdoch]

I suggest that any technical guide where you have to guess what the author intended to mean is best used for stopping a table wobbling or similar.

Like this?

 

[SPECIAL LOCATION]

Like this?

View attachment 10850

Clearly that's wrong!!

you should use a copy with a Brown cover on that floor..

That one is more suited for use with a blue carpet...

:C

I know these things because my daughters continually remind me of my poor fashion sense...

and lack of colour co-ordination in my choice of clothes...

whenever I have to go out with them in a public place !!



:coat    

 

[Murdoch]

Clearly that's wrong!!

you should use a copy with a Brown cover on that floor..

That one is more suited for use with a blue carpet...

:C

I know these things because my daughters continually remind me of my poor fashion sense...

and lack of colour co-ordination in my choice of clothes...

whenever I have to go out with them in a public place !!



:coat    

silly me

 

[Evans Electric]

I always use the On Site Guides   ....they're much cheaper . 

 

[Risteard]

Not 100% sure I agree with that word

Would you prefer unlawful, or perhaps proscribed? 

 

[kerching]

I always use the On Site Guides   ....they're much cheaper . 

And being a spiral bound tome they can be opened out and laid flat  thus giving infinitely variable thicknesses

 

[Evans Electric]

I hadn't thought of that  ...could we patent that concept  I wonder?