ZS for a 5amp BS 1362 fuse

[ian.settle1]

Thanks Ian
I take it from your kind words that you must be Pevvers appointed spokesperson can I also assume that Pevvers has been in contact with you and told you exactly what he meant because I haven't heard anything from him.
And I still can't locate the 5amp rating for the 1362, I wouldn't have asked if I could. Usually the 99.9% of crrospondance is extremly helpfull

Happy days

No I'm not Pevvers spokesman, it was just the way you have replied to him was the reason why I posted it, if you try googling fuse manufactures you will get your answerafter sifting through them like I have had to do when I want information.

 

[scotsparky]

ok my understading IS bns1362 primaraly plugtop fuses (BRB appendix 1 p229) as such on a plugtop there there for appliance protection from overload and short circuit currents. They are rarely used (20+ years experiance i have never soon) as a circuit protective device and as such why would a Zs reading be required?

 

[pevvers]

ok my understading IS bns1362 primaraly plugtop fuses (BRB appendix 1 p229) as such on a plugtop there there for appliance protection from overload and short circuit currents. They are rarely used (20+ years experiance i have never soon) as a circuit protective device and as such why would a Zs reading be required?

Maybe if you are using them in a fused connection unit from a ring. Then the 5A fuse could be used for disconnection instead of the MCB.

 

[pevvers]

Right then, Mr Eddieb, after a simple search in "Google" (you may or may not have heard of it) with the term "BS1362 5a max Zs", I have come across (right at the top of the page), some information from another forum on exactly the same topic.

Please have a look here - IET Forums - BS 1362 5A Fuses - Max Zs and then realise how very your question was to answer.

If you haven't got the energy to click the link, then I will give you the important bit here.

From Graham Kenyon MIEE (a knowledgable fella) :-

"Had this topic a few months back.

There never will be any "max Zs for 5A BS1362" in BS7671, because there ISN'T ONE !!!

(This is because of the way the BS1362 standard is worded, NOT a fault of BS7671).

Therefore, if using a 5A BS1362 fuse, you must assume Max Zs same as Max Zs for 13A, and possible minimum fusing times (for inrush current calculations) of 3A"


(Mods - at least I am showing willing )

 

[scotsparky]

Maybe if you are using them in a fused connection unit from a ring. Then the 5A fuse could be used for disconnection instead of the MCB.

If it was being used at an FCU then its overload protection for appliance only not the circuit. You dont take Zs readings at appliances its furthest point of circuit or mid point of ring.

 

[EddieB]

Peveers, many thanks for this my orignal reply was a tongue in response no pointed intent intended, it would seem that it missed the mark with some I apologise if I caused you any offence

 

[pevvers]

If it was being used at an FCU then its overload protection for appliance only not the circuit. You dont take Zs readings at appliances its furthest point of circuit or mid point of ring.

I didn't mention appliances!

I'm talking about if you want more than one double socket from a spur from a ring, or maybe spurred off from the ring to feed a light, maybe in a garage or similar. Not best practice I would agree, but can still be done. All still fixed wiring, and then you would use the max Zs for the fuse to check disconnection.

 

[pevvers]

Peveers, many thanks for this my orignal reply was a tongue in response no pointed intent intended, it would seem that it missed the mark with some I apologise if I caused you any offence

No worries mate, some of mine were maybe a little bit too methinks!

 

[martynb01132]

Are these fuses in a CU if so they should be 1361 as 1362 are for plug tops.

 

[EddieB]

Good question Martynb, these fuses were going to be installed in an in line fuse holder to control a camera, I'm not sure if you can only use 1362's in spurs, plug tops etc, any ideas out there?