why is the use of bs3036 not permited

[paulthemagpie]

hello peeps,

got a quick question i would be most greatful to get an answer to:

Why do the requirements of the 7671 for PFC may not permit the use of a BS3036, semi enclosed device as means of covercurrent protection on a home re-wire

regard magy

 

[telectrix]

mainly because it's almost impossible to fit a nail across an MCB.

 

[paulthemagpie]

a nail

 

[trev]

Yeah, seen it loads of times.

 

[trev]

Look at the time current curves. You'll find the answer

 

[DurhamSparky]

nails and off cuts of cable...

might as well murder your family with a kitchen knife as they will die in the fire any ways!!

 

[Deleted member 26818]

In situations where Ze and PEFC are such that the device will not operate and provide disconnection in the required times.

 

[ipf]

He's hoarding used 3036's nicked from defunct cu's.

 

[IQ Electrical]

hello peeps,

got a quick question i would be most greatful to get an answer to:

Why do the requirements of the 7671 for PFC may not permit the use of a BS3036, semi enclosed device as means of covercurrent protection on a home re-wire

regard magy

Because the breaking capacity of a BS 3036 fuse is typically between 1 and 3kA so in situations where measured PFC exceeds this, the device cannot comply.

There is of course back-up protection from upstream devices but the above will answer the exam question.

 

[paulthemagpie]

He's hoarding used 3036's nicked from defunct cu's.

your right! lol

Nar its to do with an assignment I've got.

I thought the main reason was because these types of fuses dont meet the min disconnection time as per the regs

regards

magy

 

[trev]

nails and off cuts of cable...

might as well murder your family with a kitchen knife as they will die in the fire any ways!!

Made me chuckle Durham, I wish there was a Love It button

 

[paulthemagpie]

but they is a "like" button which is just as good! lol

 

[trev]

I tried pressing it lots of times mate. It only works the once

 

[IQ Electrical]

your right! lol

Nar its to do with an assignment I've got.

I thought the main reason was because these types of fuses dont meet the min disconnection time as per the regs

regards

magy

But the question specifically mentioned PFC.

 

[paulthemagpie]

yes thats right, i was asking

Why do the requirements of the 7671 for PFC may not permit the use of a BS3036, semi enclosed device as means of covercurrent protection on a home re-wire