Distribution circuits

[dave992]

Good Morning

I have a series of Henley blocks suppling db’s. Henly block are protected by an bs88 63amp fuse. We have a 2.5mm 6181y cable feeding a isolator which in turns feeds a fire alarm panel, this 2.5mm cable is around 0.5 metre long and within the fire alarm isolator, there is a 20amp fuse. Would this be overrated or due to in the 2m rule be ok? Thanks

 

[telectrix]

binned

 

[dave992]

Cable from the isolator is 2.5mm fp200, so this cable of correctly protected. Thanks

 

[westward10]

It may satisfy overcurrent requirements but possibly not fault or short circuit requirements.

 

[Pete999]

Good Morning

I have a series of Henley blocks suppling db’s. Henly block are protected by an bs88 63amp fuse. We have a 2.5mm 6181y cable feeding a isolator which in turns feeds a fire alarm panel, this 2.5mm cable is around 0.5 metre long and within the fire alarm isolator, there is a 20amp fuse. Would this be overrated or due to in the 2m rule be ok? Thanks

Deleted

 

[Zdb]

2m rule ?

 

[Pete999]

2m rule ?

I have a 5M one

 

[Toneyz]

I have a 5M one

There's always someone that has to boast that theirs is bigger.