Which is it?

[Oracle]

Was looking at a service cutout fuse the other day.

Noticed the fuse was labelled as a BS1361 and BS88. :|

So which is it? ?:|

O.

 

[Andy™]

only way to find out is to remove the fuse the look at it - i often put 'sealed' on certs if i cant gain access

 

[Evans Electric]

Just pick one , lets face it , no one will ever check !!! Life is too short.

 

[Andy™]

and if the fuse does ever blow, itll get replaced with whatever the bloke has - which may not be whats on the cert

 

[Oracle]

I was looking at the physical fuse - not the carrier!

It was made by lawson, rated at 100A. Marked with the ASTA logo.

Had 1361 on it, and BS88 415V

O.

 

[Evans Electric]

Oh right , interesting that one. Don't have a clue, see what the Forumites come up with . I suppose for your PIR then, you put both down as its on the fuse.

Deke

 

[GreekIslandLover]

Seen these before, and bought this up in the 2391 class. lecturer denied that they didn't often have type I or II on them - let alone that fuses can be marked with both standards. I often pick a type and put it on the form as if the fuse conforms to tboth standards it isn't innacurate to put one type on the form.

I also put LIM - sealed fuse on a periodic rather than cut the seal just to find that out.

 

[Badger]

i always put N/V by the side of the bs number of the fuse, (not varified)

 

[SuperSwift]

same here n/v

 

[NozSpark]

I'd put it down as a 1361 II as they have a PFC of 16.5kA, which in a domestic premises allows you to use 6kA MCB's (if I remember rightly???)

 

[Andy™]

as long as something is rated to PFC, then you can use 6KA breakers. you could even use 1KA rated 3036's if the PFC is higher

 

[batty]

as long as something is rated to PFC, then you can use 6KA breakers. you could even use 1KA rated 3036's if the PFC is higher

I thought it would need to be lower.

 

[Andy™]

providing there is something in the circuit to break the PFC, then you can use protective devices to a rating lower than the PFC.

so if you have a PFC of 2KA, you can use a 1KA 3036 providing there is a BS88 or 1361 which can break the 2KA

 

[batty]

Not a good idea though.

 

[Andy™]

Not a good idea though.

not ideal, but how often are you going to have the actual fault current of more than 1KA?

in most situations, the fault current will be under 1KA, and wont take the service fuse with it, if there is a large fault current, even if the 3036 was rated higher, it could still take the service fuse

 

[batty]

I thought the idea of picking the mcb/cartridge fuse or rewireable was so if there was a short circuit the device will be able to withstand the current flowing. So if you have 2ka at mains and you use a 1ka rated device it will not be good for that device and possibly could cause a fire at worst.

Batty

 

[SPECIAL LOCATION]

Was looking at a service cutout fuse the other day.Noticed the fuse was labelled as a BS1361 and BS88. :|

So which is it? ?:|

O.

Both!

the fuse meets the specification of both BS1361 & BS88.

Appendix 1 page 228..

BS88: cartridge fuses for voltages up to and including 1000V a.c. 1500V dc

mainly industrial applications for use by authorised persons!

BS 1361 cartridge fuses for a.c. circuits in domestic and similar premises.

replaced by BS 88-3:2007 but remains current!

{no mention of DC voltages for 1361 spec! }

most likely 16.5kA if both numbers on on fuse.

e.g. 1361 type1 & BS 88-6 pg 57 OSG.