bs3871 fuses!!!!

[scotteng]

hello, anyone know what the zs is for bs3871 fuses to meet regs disconnection times.
plus any ideas what type of bs3871's i have...they are the switch type with no push buttons...i think they are type 2, but not 100%

cheers

 

[RF Lighting]

Depends what size they are, and you need to be certain about the type.

It's all in BS7671 anyway.

 

[scotteng]

there are various amps from 1.5 up to 30 amp.....it doesnt say what type they are on the fuses. any idea how i identify them?? plus where in the regs is the zs values?

 

[RF Lighting]

Have you looked on the side?

What exactly is written on the MCBs

Have a look at table 2D in the On Site Guide

 

[Adam_151]

Type 1 max zs = 230/(ratingx4.7)
Type 2 max zs = 230/(ratingx7)
Type 3 max zs = 230/(ratingx10) [same as a 60898 type C]
Type 4 max zs = 230/(ratingx50) [in absence of any specific manufacturers data]