On 11/02/2014 20:43, Johny B Good wrote:
On Tue, 11 Feb 2014 10:42:42 +0000, John Rumm
wrote:

On 11/02/2014 04:47, Bill Wright wrote:
John Rumm wrote:

No need for the 5A FCU. The 6A MCB or 5A fuse will take care of any
overload.

My reason for including it was not for protection of the wiring, but
for adding discrimination if possible.

Use a 1A or 3A fuse then.

Indeed... although it does depend on what the main circuit is protected
with. There are some 10A lighting circuits about which will offer more
scope.

I suspect such circuits would only qualify for the higher 10A rating
when completely wired up with Pyro cabling and appropriate fittings. a

10A is well within the capability of even 1.0mm T&E in some cases, and
1.5mm T&E in most.

There used to be a restriction on not using SBC and SES lamp fittings on
such circuits, but that was deleted with the issue of the 17th edition.

more likely scenarion in commercial premises rather than in premises
of the domestic persuasion (i.e. a house) where the limit has always
been 6A fusing at the CU panel afair.

10A is used domestically as well... I have certainly met it a few times.

--
Cheers,

John.

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