new minor works certificate for a fused spur

[gmdaly]

Hi, can someone give me some advice RE completing a small works certificate for a fused spur coming from a ring final.

1) In part 2 of the AMD2 small works cert, its wants Zdb supplying the final circuit. Does this mean the Zs for the ring final that I measure or the MaxZs 32A MCB which is 1.1?
2) for part 3 of the cert, is the new FCU 13A then in effect the new DB and therefore I would put in FCU, BS 1362, 13A?
3) Then for part 4 test results do I complete the R1+R2 just for the cable from the new socket to the FCU? will my max Zs be the rating for the 1362 fuse at 1.83?

Thanks for your help,

gordon daly

 

[James]

I’ll try to be more succinct. The 1362 fuse can be changed easily. If a lower fuse is used to achieve disconnection times, and is subsequently changed to a higher fuse, then its a poor design.

As said, I think we should agree to disagree.

Long time resurfaced thread!
expanding on your idea,
every device powered by a U.K. plugtop could be considered a design failure (other than 13A appliances) as the fuse protecting it could be changed.

 

[gaxxter]

Long time resurfaced thread!
expanding on your idea,
every device powered by a U.K. plugtop could be considered a design failure (other than 13A appliances) as the fuse protecting it could be changed.

hmmm fused spur thread I give up lol

 

[nicebutdim]

we put a label on max fuse size blah take pic covered job done?

Can't imagine labelling spurs in a domestic setting and I'm yet to see one labelled with fuse rating in any other setting. Just as with any fuse, it is expected that replacement would be like for like.

 

[gaxxter]

Can't imagine labelling spurs in a domestic setting and I'm yet to see one labelled with fuse rating in any other setting. Just as with any fuse, it is expected that replacement would be like for like.

the drones need to be guided!

 

[nicebutdim]

the drones need to be guided!

If someone isn't capable of reading the rating of a fuse and fitting an appropriate replacement, they shouldn't be replacing one in the first instance. I doubt external labelling will make any difference to those minded otherwise.

 

[Midwest]

Long time resurfaced thread!
expanding on your idea,
every device powered by a U.K. plugtop could be considered a design failure (other than 13A appliances) as the fuse protecting it could be changed.

But a plug ‘top’ BS1362 fuse is not protecting fixed wiring is it, so perhaps not a good analogy.