SELECTIVITY, DISCRIMINATION and CO-ORDINATION of electrical devices for protection

Just how do you ensure that a fuse or breaker is going to blow first in an electrical circuit.


It is not just simply a matter of choosing something bigger. We have to consider the expected overload current, since different devices respond quicker or slower than others as the size of the overload changes.


This video leads you through the basics of the design process when selecting devices so that the proper coordination and safety is achieved.


The objective with correct selectivity and coordination is to make sure that the faulty circuit is disconnected whilst leaving the rest of the house energised and working.


This video is No.84 on our YouTube channel where we have videos on a wide range of electrical topics.


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Always work safely, electricity can be dangerous. If you are unsure, stop and seek advice.