On 23/09/2012 03:35, The Natural Philosopher wrote:
John Rumm wrote:
On 23/09/2012 00:56, wrote:
On 22 Sep,
"Dave Plowman (News)" wrote:

In article ,
Doctor Drivel wrote:
What's wrong with those cheap BG CUs from B&Q? I'm tempted to replace
the CU here with one.

Get a Wylex CU, the difference is apparent. And use RCBOs on each
circuit. Far more expensive but well worth it. Far better.

Gawd save us. He's claiming to know about electrics now.

I would agree that RCBOs can offer a better solution, at a *much*
*greater*
price.

Indeed - and not often worth the expense IME. You can go for a
pragmatic middle ground with "high integrity" 17th edition style CU[1]

Put any high trip risk circuits on RCBOs, then share others around the
other two or three RCD groups.

[1]
http://wiki.diyfaq.org.uk/index.php?...gh_I ntegrity



Put the whole house on 100mA RCD and then use 30mA RCBOs for selected
sockets

That was common on TT systems under the 16th edition. The cable
protection requirements make it less workable for new installs.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/