BS88 - 15 or 16amp?

[Lectrician]

Question thrown at me while recapping 17th edition.

13.04amp load on 15amp BS88 fuse. If the 15amp fuse suffered a 60amp overload, using appendix 3, determine how long it would take for the device to operate?

My green regs book has current charts for BS88-2, BS88-3 fuses, but not for 15amp? Am I missing something obvious?

 

[flameport]

Probably an old question which originally referred to 15A BS1361 fuses, then when that standard was replaced, someone updated the question to BS88-3, not realising that the series of values used had also changed, and there was no 15A in the new standard.

 

[Lectrician]

That makes sense looking at my old regs. The answer was 1 second. So that works as expected.

Feel like firing off a ****ty email - you don't pay that sort of money for dodgy info!

Cheers.

 

[securespark]

What did you pay for, Lec?

BTW, was back in Devon near Okehampton and Dartmoor recently. Lovely.

Raining.

But still lovely.