Type C breakers are usually specified for commercial use...
We also have Type 'D' (amongst others) which break at something like 10-14 times rated current - I was looking to replace and old rewireable but Type B + C wouldn't take the inrush - was warned off Type D as it was unlikely that it would trip in the required time as we couldn't supply the fault current so it was back to BS1361 cartridge fuses.
Chris
