MCB question

[D80]

How long can a 32Amp MCB hold for if circuit is pulling around 38Amps?

 

[SPARTYKUS]

Off top of head a long time. 1.13 x 32 will hold all day, 38 isn't much more. Would need to get out of bed & look it up. So no chance.

 

[i=p/u]

im getting 166 minutes

 

[telectrix]

it's off the scale at 38A, it would stand 45A for 10,000 secs. so my answer is forever.

 

[D80]

I get the same through the regs Telectrix. If it would stand 38A forever, why is it a 32A MCB:6:

 

[Knobhead]

If you rate it at 38A some silly bugger will ram 45A through it.
You just have to set a base line somewhere. Why did 30A become 32A? Why did we join the EU? Why did I ……….

 

[Richard Burns]

32 amps is theoretically the maximum current that the MCB can take and never trip, with 38 amps it may run for two days and then trip. Since the graphs only go up to 3 hours we can only estimate longer trip times.

 

[Knobhead]

Why did we join the EU?

To my eternal shame I voted for it.

 

[malcolmsanford]

To my eternal shame I voted for it.

And I was the other one ......................... but I fell for Ted and his amazing organ