Yes, so why is it not possible?
3 amp fuse in FCU for boiler
- Thread starter sparkwright
- Start date
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They don't have 3A fused connectors or plugs in Europe.
But they have had for a very long time and do use things like this: https://www.screwfix.com/p/chint-3a...Eg&gclsrc=ds&dclid=CIPv8cGKlNkCFY2lUQod34QDEg
And yes they do have fused switches too
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...but they don't use 3A MCBs because the boiler instructions do not call for 3A protection.
Please show a fused switch.
Also the British MIs call for a 3A FUSE so presumably an MCB would not be following the MIs.
I know that's silly but that's what people are saying.
Please show a fused switch.
Also the British MIs call for a 3A FUSE so presumably an MCB would not be following the MIs.
I know that's silly but that's what people are saying.
But they do, they tend (emphasised) to design their circuits for it's intended use and have big CU's full of all sorts of different sizes of MCB
I worked in a pool plant room in France summer 2016 or possibly 2015, each device had a ceramic block containing a removable block which held 2 fuses, this block is held in with a large (1") plastic nut/knob. once screwed on the block is pushed in for on or pulled out for off. A shutter arrangement keeps it safe.
I don't think anyone would seriously dispute the validity of an MCB in place of a fuse.
I am paying attention and bringing to the attention of others, in the form of a question, that this had in fact been mentioned previously.
...but they don't (for boilers). It is not required.
I don't live in a plant room.
I don't think they would, but the instructions do state a 3A fuse.
Fair enough, but the instructions for boilers sold for use in mainland Europe do not appear to include any requirement for the use of any sort of 3A OPD (in the same way that they do in the UK) - so at least a substantial proportion are probably connected directly to 16A circuits.
Kind Regards, John
If you accept that it would be reasonable/safe to have a single point of isolation for the CH system and that Honeywell (for one) advocate the use of 3A fuses for their programmers and room stats, why do anything else?
Regards
Regards
You and Sunray seem to be missing what is actually being discussed.
Do Honeywell not sell their programmers and room stats outside of the UK?
If do they do, what do they say about fuses in non-UK countries?
Kind Regards, John
But why do they?
This appears to be the current understanding:
- There are no requirements in the Wiring Regulations for gas appliance supplies to be fused at 3A.
- There are no requirements in any gas regulations for gas appliance supplies to be fused at 3A.
- The Wiring Regulations do not make it mandatory to abide by any manufacturer instructions.
- The Gas Safety (Installation and Use) Regulations (I'm assuming it is they) do make it mandatory to abide by any manufacturer instructions.
- Some gas appliance manufacturers require 3A fusing in the UK.
- Some gas appliance manufacturers do not require 3A fusing outside the UK.
- Nobody knows why #5 is justified, particularly when #6 applies to the same appliance sold elsewhere.
- Notwithstanding #7, #4 means that observing #5 is not optional.
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