"Uncle Peter" wrote in message
news
On Thu, 23 Oct 2014 14:57:16 +0100, John Rumm
wrote:

On 23/10/2014 14:46, charles wrote:
In article ,
John Rumm wrote:
On 23/10/2014 12:29, Uncle Peter wrote:
On Thu, 23 Oct 2014 12:15:08 +0100, charles
wrote:

In article ,
Uncle Peter wrote:
On Thu, 23 Oct 2014 10:55:11 +0100, Dave Plowman (News)
wrote:

In article ,
Uncle Peter wrote:
It might trip if overloaded, which is its
purpose. As a fuse will blow.

But they're too sensitive to transients like bulk capacitors.

Then use the correct one.

They're against the regs.

Do tell us which ones.

In a school there are more regs.

BS7671 covers schools as well as domestic property.

but some LEAs have their own regulations over and above the national
ones.

Indeed, but generally not under and below... i.e. a LEA should not be
able to override BS7671 with a lower standard.

In my case it was a higher standard. The electrician quoted it to me, it
was the number of milliseconds before tripping in an environment where
kids are present.

That is for the RCDs, not the MCBs.