- Reaction score
- 2,811
Much though I don't like it, once in a while I use a second hand MCB - for one that has long since gone obsolete and new ones are unavailable. What about testing used MCBs before reusing them, does anyone actually do this?
I just tested a 5A MCB at a couple of values of loading, it seemed to more or less follow the curve in the BGB - for example, at 12.5A, it reliably trips after approx. 25s. I'm thinking this is all I can practically do.
NB: For a much larger rated MCB, even this would get tricky, I don't have readily available loads.
I just tested a 5A MCB at a couple of values of loading, it seemed to more or less follow the curve in the BGB - for example, at 12.5A, it reliably trips after approx. 25s. I'm thinking this is all I can practically do.
NB: For a much larger rated MCB, even this would get tricky, I don't have readily available loads.