mcb tripping

[rapidrich]

has anyone came across the problem of a mcb triping on a imersion curcuit when the hot water is run for a period of time ?

 

[pennywise]

What the breaker size, element might be on it's way out.

 

[bugsy]

Could be due to expansion of the contraction and expansion of the element ( I.R,test)

 

[Guest123]

Could be the element slowly breaking down after a period of being switched on and off by the stat.

 

[rapidrich]

16a mcb mate

 

[GStueyXR]

First check It ≥ In ≥ Ib

then..

Best do an insulation check.

Then I would disconnect the heater and check the resistance of the element is proportional to the power rating of the heater...

For a 16A Breaker, any resistance across the element of less than 14 Ohms ( 3.5 KW ) will trip the breaker .