whisky-dave wrote:

What makes you think it could only supply 140A ?. Isn't that the
case with all 32A MCB anywhere in the country

The MCB doesn't really limit how much current you can draw, it just cuts
off if you happen to take too much for too long, it's the length and
cross-section of your cables that limit what you really can draw
140A at 202V is 22kW heating up your cabling, your lab should be toasty
until the fire service arrive.

What makes you think that

stick a 6" nail through the submain coming into your lab and find out.

but it wouldn't be 140A at 202V would it. If we can only get 40A at 202V

bzzzt, you've got to be trolling ...