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It's a factory manufactured Toshiba single phase exterior mounted unit with no inverter. I have now got it up and running on the type B MCB and it appears to be holding well, as these units cut in and out frequently. If it fails, I'll upgrade to a C type MCB I think. Thanks for all who posted...

Other breakers are type C. Being an obsolete SquareD box, I could only get a type B which I believe is worse for the start-up current. Type D is about as good as a rusty nail. It's one of those suck it and see situations I think, but I really wondered if anyone knew the calcs for this sort of...

The aircon units are not exactly the same as the existing ones. Yes they are wired in 2.5mm. I just want to do it properly and not copy something which could be incorrect. My cable run is approx 25 metres on a suspended ceiling. @Breezer: Are you saying that my 32A breaker will not hold...

I'm sure about the 80A, I have the installation manual. Syas nothing about the cable or breaker though. So the air con should be OK in 2.5mm then? Says 2200W on the side of the unit, although similar units are wired into 32A breakers. How long can 2.5mm sustain this 80A surge for? I have...

If an air conditioner pulls 80A to start up but 16A when running, can this be wired in 2.5mm cable to a 32A breaker? Where do I find info about temporary loads cable can take?