i went to hardware shop than uncle tell me to buy this for my heater, what is this??
i open up and see, actually nth special inside

after google search, i found tht  this is call 20Amp Connection Unit.

My parent hdb will be having HIP upgrading for their toilet. 

 

 

Edited July 31, 201610 yr by harky

It is like the 13amp fuse in our normal 3-pin plug but this is rated for 20amp and cannot be plug/unplug easily. Probably also more moisture resistant.

Edited August 20, 201610 yr by w7_lee