Does anyone have a set of trip curves for an older type II MCB they
could point me at?

I was under the impression that they were not that dissimilar to modern
type B devices, but was getting somewhat different behavior from what I
assume is just a faulty device.

The new place has two downstairs lighting circuits, the most heavily
loaded of which (about 1050w by my quick count) was thermal tripping
after a few mins with a decent proportion of the lights on.
Investigations showed even a load a little below its rating would cause
a trip.

--
Cheers,

John.

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