Discuss 411.3.2.2 iee 2382 in the Electrical Forum area at ElectriciansForums.net

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bathroomboy

Have I read this right, just swotting up for my 2382 and looking at max disconnection times, the big red book Iv'e just spent £60 on says 0.2 in table 41.1 page 46, checked osg and it's what it should be 0.4
 
0.2s for TT me thinks, hence the need for an RCD. 0.4s for TN systems.

Scrap that I just had a look in the book. Over 230v it is 0.2 seconds. Over 400v it is 0.1s
 
Last edited:
I think what you may be missing here is the OSG states 'not more than'.

I must admit, the OSG does have a fair few errors in it and so now, i check 7671 just to make sure.

Personally, i would go with the BRB rather than the OSG.
 

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