help with a lighting circuit and a circuit breaker

[schmeagle]

Hello to the members of Electrics UK.

Wondering if anyone can help out with a question?

I am doing a job onsite and the specification on my distribution board for the lighting circuit is a 16Amp RCBO to BS EN 61009-1 (C type).

The circuit is only running a 5 x 50 Watt lamps. The max has got to be 100W each fitting. Ib = 2.08Amps Max and a Ib 1.04 Amps (normal load).

Am I wrong in saying this is OTT and a 6 amp would service? or is there a hidden factor I am not including into my cable calculation? Will the device still trip or is it over rated?

Look forward to this one as I think the designer could be wrong?

See what you all think. Include regulation numbers if you can.

Thanks in advance to all posts.

 

[ricicle]

In the absence of any other specific data, lighting circuits are generally designed to be protected by a device no bigger than 10A.
Have you checked that 16A is not a typo ?