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Thanks for your prompt responses folks. Confirms what I was thinking.

Would a 230V, 50W anti-condensation heater work ok with a 254V supply?

Hi. Thanks for your response. This is not a DIY effort, it will be installed by qualified electricians, I'm merely double checking the circuit protection requirements for my own benefit. This is a new supply. The cable will not be used for anything else, it will be fed from a panel that has...

I have 254V feeding a 50W anti-condensation heater via a 3c x 2.5mm cable. The load is approximately 0.196A (196mA). Can anyone please advise what size of MCB I should use for this? I feel that a 250mA or 300mA circuit breaker would probably be on the small side, and I'm thinking of something...

Thanks for your feedback Marvo and Phoenix, it's very much appreciated. What you've both said makes perfect sense, unlike my original post, which should have said 400V AC not 400A. The VFD isn't installed yet. I think the requirement is to give the customer a general idea of what to expect...

I've been asked to complete an electrical load list with the watts required for each phase of a 3Ph, 400A, 11kW VFD. The VFD is feeding two motors with a total load of 21A. How many watts for each phase?