RCDs

[Podooser]

With an RCD rated at for example 30mA - 60A, what does the 60A refer to. Sorry if this is a stupid question.

 

[Adam_151]

The amount of current the RCD can safely handle, rather similar to the ratings on switch disconnectors, etc

60A RCD.... ok at 20A, at 40A, and at 60A, burns your fingers at 70A and is a sticky puddle at 80A

 

[ricicle]

60A is the maximum load current that the RCD can carry as opposed to 30mA which is the maximum earth fault level at which the RCD will operate

EDIT: Bah - beaten by the Phoenix

 

[Podooser]

So why don't we just use RDCs rated at say 100A for all applications. The protection it will give is just the same.

 

[Spark123]

Cost.

 

[Podooser]

That simple hey. Thanks for the replies.

 

[RF Lighting]

Just as a side note, the 80A is the load the RCD will safely carry. If this limit is exceeded then the RCD will not 'trip' (unlike an MCB) and therefore it MUST NOT be used to provide over current protection.