- Reaction score
- 51
MCCB with RCD bolt on, anyone know how to work these settings out? Ignore settings now but this is upfront RCD TT system so I want to top one to be 0.3 for 300mA but unsure on bottom?
Discuss MCCB with RCD settings in the UK Electrical Forum area at ElectriciansForums.net
Supply to 3 X BS88 in same panel, then onto some boxes with 16A sockets and relevant 30mA RCBOs in boxesWhat is the mccb which the module is fitted to supplying.
So just set to your diconnection time?No, of course not.
You have to set it to 0.2, or less.
Yes, you can’t set it to higher than the maximum disconnection time allowed.So just set to your diconnection time?
If you were using it to protect distribution circuits or other circuits greater than 32A, yes you would set it to 1s.Thanks guys really appreciate your time
So if it was more than 32A TT system I’d set it to 1.0 second for instance?
That is commonly called a vigi module. You will notice when set for 30ma there is a line down indicating to set to no delay so additional rcd protection is provided.
BS7671 appears to have dropped the requirement for 30mA RCDs to operate within 40ms.
The confusion was caused by the change to 415.1.1.
Reply to MCCB with RCD settings in the UK Electrical Forum area at ElectriciansForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.