MCB circuit breaker

[Zebbedee]

What’s the next size of MCB up from 63amp is it then 100 amp

 

[Netherfield]

Most seem to stop at 63amp

 

[shumungus]

What’s the next size of MCB up from 63amp is it then 100 amp

80amp then 100amp

 

[TheTallGuy]

For a domestic type consumer units the largest is usually 63A as there's not really a need for anything larger. You can get higher circuit breakers for some commercial distribution boards & it's typically 80A,100A & 125A & will generally be either C or D curve.

 

[Fordson1]

If you are going up in amp rating just because of tripping on a circuit that has a heavy load it's worth knowing that there are different types of trip sensitivity. Eg. A normal domestic B20 amp mcb will trip quicker than a D20 amp version. If the load has a high start current it might be possible to just change for one with a longer "delay" before tripping (eg.D63 amp) rather than just going for one with a higher amp rating.
Not that I'm an expert, just discover this lately. Sorry if you already know and I'm stating the obvious.

 

[Zebbedee]

Yea new circuit to add for a mobile drier and spec is 100 amp useage needed but as not all motors starting at same time hoping 80 amp will work it ok and probably d rated