Technical information

6.1 - Class CC fuses

These are the most common and used in the protection of transformers, loads and

motors (they have both a “Fast” intervention curve and a “Time Delay” curve), they

are ideal for Feeder and Branch circuits and are similar to European 10x38 fuses.

Their limit is the size; ranging only from 0 to 30 A.

Attention: these fuses require their own dedicated fuse holder the 1492-FB for CC

class fuses, as specified in the NEC.

CC class fuse Bull fuse holder 1492–FB and 140–F

6.2 Class J fuses

These are the most common fuses for the protection of electrical panels, in

switches with fuses. Outstanding for the protection of equipment, motors,

actuators etc.(they have both a “Fast” intervention curve and a “Time Delay” curve)

they have different construction shapes as the size varies (range from 0 to 600 A ).

They need their own dedicated fuse holder.They are not interchangeable with

fuses of other classes.

Class J fuse Bull. 1491 fuse holder.

6.3 Class K and RK fuses

These are fuses that are suitable for the protection of electrical panels, in switches

with fuses, motors actuators etc.(they have both a “Fast” intervention curve and a

“Time Delay” curve) they have different construction shapes as the size varies

(range from 0 to 600 A ).They need their own dedicated fuse holder.They are not

interchangeable with fuses of other classes.

FEEDER AND BRANCH CIRCUITS