whisky-dave wrote:

On Friday, 17 November 2017 18:07:55 UTC, Andy Burns wrote:
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

But I don't see how that is relivant anymore than it is in your home.
Do you consider the CSA of you're home cabling ?

The person who installs it *must* do so. Fortunately, if they just do
what everyone else does they may well be not far wrong.



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.

Why the submain ?


--

Roger Hayter