ECN Forum Forums General Topics of the Trade General Discussion Area 100% breakers?

Another interesting difference between the US and any other country I've worked with so far - in Europe all tables refer to continuous loads so 100% is always 100% unless you need to derate for bundling, higher ambient temperature, voltage drop etc. The only rule is that the nominal current of the overcurrent protection must be greater or equal than the load current and smaller or equal to the conductors' rating. And all conductors commonly used in fixed wiring are 70C.