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5.5hp comp on 4mm cable?

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Got a scroll unit i'm fitting, its 5.5hp 1ph :eek:

MRA is 37A plus 2-3A for fans, factory wiring is in 4mm and they've used a terminal strip (30A?) for it too.

Is 4mm big enough or does it all want changing (have got some 57A rated din rail to replace terminal strip on order)

I'm doing all my power in 10mm as its on a 50 breaker.

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