Discuss STRANGE NEUTRAL CURRENT !!!! in the Commercial Electrical Advice area at ElectriciansForums.net

If you think the bill is wildly inaccurate from the evidence of consumption you can see then install a data logger or a temporary CT meter to check its accuracy.

If the metering turns out to be accurate then draw up a plan to make some easy savings such as converting halogen/filament lighting to LED, install timers on hot water cylinders and reduce water temperature, clean all the refrigeration condensors and check fridge door gaskets etc etc.
 
...I have calculated his total load from fridges etc info plates lights by counting and added about another 30A on top , and it comes to 119A total . Now this is spread over a 415V 3 phase supply , which i have clamp metered up and monitered the indivdual cores which average out Brown/red- 23A , black/yellow- 19A & Grey/blue - 42A , oh and the neutral comes back with 38A on it.This obviuosly is nowhere near 269KWH , and was thinking this rouge N current must be from a dodgy connection on supply side ? It is also obviously a potential overheating risk i would have thought ?

So, your average measured currents give about 20kW at 240V. Multiply by 24h, gives 480kWh per day. So I doubt that the supplier's meter is over reading.

I agree with Lucien, there's no problem with the neutral current, given the unbalanced load.
 

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