Fuse in a spur

[Jay2506]

hi fuse had blown in spur feeding boiler. Removed it and went to fit new one - won't fit in! Is there a technique to this? It's exactly the same size as the fuse I removed which just pinged out! There's a small lip at top and bottom which means it won't just pop in. Middle bit isn't wide enough to put it down n and then slide up. Am I missing something - doh!

IMG_2910

• Jay2506
• 9 Apr 2017

 

[EFLImpudence]

Will the drawer not pull out a bit farther?

 

[333rocky333]

And if you do finally get it in the slot, did you try from the right side.
Switch it off before pushing back in

 

[Bosswhite]

Depends on make of unit, Pull the holder out to its limit, then slide in the fuse through the gap on the edge rather than the front. put the switch to off first.

 

[ban-all-sheds]

Don't be ridiculous.

 

[mwatsonxx]

Don't be ridiculous.

Yes you are, hahaha

 

[ban-all-sheds]

So let's see.

Is it you, or is it I, who is giving someone ridiculous "advice" here?

 

[winston1]

hi fuse had blown in spur feeding boiler.

Any idea why? You may struggle to fit fit a new one to find it blows again.

Of course it may be that a 3 amp fuse should not have been fitted in the first place, so fitting another would be silly. I'm sure the cable feeding the boiler (which is all the fuse is supposed to protect) is not so thin a 3 amp fuse is required. The boiler, of course, will have its own internal protection.

 

[seasickstevie]

I think someone needs to look a little closer at the picture ... and I don't mean Mr Watson.

 

[endecotp]

It's exactly the same size as the fuse I removed

Are you sure?
What writing was there on the old fuse?
Let's see a photo of the two fuses next to each other.

 

[securespark]

EFLI is spot on. Those FCUs have a fuse drawer where you need to pull it out further in order to fit the fuse - the first bit you see when you pull it out is not where the fuse sits.
As for the size of the fuse, isn't it stipulated in the gas regs that all gas appliances must be supplied via a fuse no bigger than 3A?

 

[winston1]

As for the size of the fuse, isn't it stipulated in the gas regs that all gas appliances must be supplied via a fuse no bigger than 3A?

Where? The only electrics on some gas cookers are a battery for the sparker. As for boilers that fuse, if it is stipulated, will be inside the boiler. Any external fuse is to protect the cable only.

 

[Taylortwocities]

It not only protects the cable. There are other devices in the heating system that require a 3A fuse. That is their only protection, they do not have an internal fuse.
Here's a typical manual that specifies this requirement
http://www.akhheating.co.uk/images/downloads/LP522 Instructions.pdf

 

[ban-all-sheds]

It not only protects the cable. There are other devices in the heating system that require a 3A fuse. That is their only protection, they do not have an internal fuse.

Then they should have.

Any manufacturer who makes something like that without adequate internal protection clearly has such an appalling attitude to good design that they should be passed over in favour of makers who do actually know how to design quality products.

However, I don't think the programmer you mentioned is an example.

1) It doesn't explicitly insist on a 3A fuse for its own protection.

2)

​

3)

I didn't check any other country sites - figured 3 was enough. How would an installer provide a 3A fused supply for the programmer in France, Germany, Italy etc?​

 

[securespark]

Ban
I'm talking gas regs in the UK. What does selling programmers in France or Germany have to do with gas regs in the UK?

Maybe we should ask any gas lads here if there are gas regs covering this. I grew up being told all gas appIiances and systems were limited to 3A. Can it be completely fabricated?