Aardvark Avo said:63a rccb will cover overload protection and provide positive discrimination
So what is the difference between an [RCCB with overcurrent protection] and an RCBO? RCBOs also come in double module width as double pole devices.Aardvark Avo said:lets be perfectly clear about this, the rccb with overload protection are not rcbo, they are similar in size to a fused main switch not the size of an mcb.
Why would protecting a whole installation with a single RCD be safer than individual RCDs though?Secondly in terms of fault this system is better at sensing faults compared to a fuse and disconnecting quicker
It may be your view, but not the view of everyone else on here. An RCBO as stated before can come in different configurations, single pole, double pole etc. As you can appreciate terminology is very important in this job.Aardvark Avo said:my view is
rcbo is mcb with rcd,single pole
OK, I'll call an RCCB an RCCB just like the IET call it.rccb double pole or 4 pole with or without overload protection
but either way call it what ever you like
You posted before:never suggested that it was one rcd device, what I suggested was that the house was on a 30ma rcd protected consumer unit as tt installation.
from the tail block to protect the submain a 100ma rccb time delayed with over current to protect the sub main.
the garage would then have rcd protected consumer unit at 30ma for supplementary protection against direct contact tt install.
That implies the DNO service head.personally I think service cutout fuses are old hat and rccb with overload protection is the way forward
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