3amp FCU Tripping

SO1 · Jan 30, 2016

customer asked for a 2g socket and single light to be put into her outhouse which was connected to her kitchen, as there was no power there i had to take a spur off the existing kitchen radial circuit into the outhouse, i took it from the spur to a 13amp FCU onto a 2g socket then onto a 3amp FCU then onto a single 60w lampholder. everything worked and tested fine when i left but within 24 hours the customer rang me and said the 3amp FCU had blown. any ideas?

Flanders · Jan 30, 2016

I only said this because i was called out years ago to a bown fuse only to find the customer was using old blown bulbs (sorry i mean lamps)

Dave OCD · Jan 30, 2016

So simple [I bet]. Dodgy lamp blows taking out 3 amp fuse, customer assumes just bulb replaces and it doesn't work...

shanky887614 · Jan 31, 2016

put a 5amp in its less likely to blow. 5amp are black i think

malcolmsanford · Jan 31, 2016

SO1 said:
customer asked for a 2g socket and single light to be put into her outhouse which was connected to her kitchen, as there was no power there i had to take a spur off the existing kitchen radial circuit into the outhouse, i took it from the spur to a 13amp FCU onto a 2g socket then onto a 3amp FCU then onto a single 60w lampholder. everything worked and tested fine when i left but within 24 hours the customer rang me and said the 3amp FCU had blown. any ideas?

If it was a Radial, why have you spurred off it? Surely you just add another socket to the radial, then fuse down with an FCU for the light

Risteard · Jan 31, 2016

shanky887614 said:
5amp are black i think

All except 3A and 13A are black. That is because 3A and 13A are the only recommended ratings in BS 1362. It also means the characteristics of other ratings may vary between manufacturers.

snowhead · Jan 31, 2016

Risteard said:
All except 3A and 13A are black. That is because 3A and 13A are the only recommended ratings in BS 1362. It also means the characteristics of other ratings may vary between manufacturers.

He's not wrong;