L
leestaf
Hi Guys
Any advice would be much appreciated!
I have tested a property that has a PFC greater than the short circuit capacity of the mcb's protecting the final circuits, the PFC is 7.9KA and the 60898 mcb's 6KA. The property is protected at origin with a 1361 type b fuse 16.5KA. Under the regs as i understand them the protective device must have a short circuit capacity greater or at least equal to the PFC, therefore am i wrong in assuming that i advise the client that the mcb's protecting the final circuits are upgraded to 10KA or not?
Would the 1361 fuse with a higher breaking capacity and similar fusing factor to the mcb protect the installation or not, also would this mean a lot of domestic properties that are situated close to substations but with "run of the mill" 6KA mcb's require upgrading??
Any advice would be much appreciated!
I have tested a property that has a PFC greater than the short circuit capacity of the mcb's protecting the final circuits, the PFC is 7.9KA and the 60898 mcb's 6KA. The property is protected at origin with a 1361 type b fuse 16.5KA. Under the regs as i understand them the protective device must have a short circuit capacity greater or at least equal to the PFC, therefore am i wrong in assuming that i advise the client that the mcb's protecting the final circuits are upgraded to 10KA or not?
Would the 1361 fuse with a higher breaking capacity and similar fusing factor to the mcb protect the installation or not, also would this mean a lot of domestic properties that are situated close to substations but with "run of the mill" 6KA mcb's require upgrading??
