OP
- Reaction score
- 52
Is the MCB tripping? Any signs of thermal damage? Have you clamped the cable to get an idea of actual current flow?
Sounds like a kitchen, in which case diversity may apply to a lot of the 25kW. The two dishwashers won't be pulling 5kW each all the time they are on, much of that is likely to be the wash water heating which will cycle reducing the overall load, depending on size, it could well be just a few hundred watts for control and pump power.
A full list of appliances and their loads may help provide a better answer, but if it's not tripping, there's no evidence of thermal damage to the cable or breaker, I'd be inclined to leave well alone pending a better assessment of the actual current that is likely to be flowing.
Not on the sub panel circuitry. But on the main CU circuitry. Melted socket internally but no tripping of MCB which is odd. I suspect the MCB may be faulty so you can't take it for granted that there is no tripping. It's a busy cafe. But even without the dishwashers the MCB is at full capacity. I don't know about the cable. Other have sugested data logging exercise so that would appear to be the next logical step.