Fuse size for sy plan am2

[Strima]

So, just go for the 3 amp fuse then. Has anyone actually done the latest am2?

I'm tired of saying this. READ THE ----ING INSTALLATION DOCUMENT, IT WILL TELL YOU ON THERE!!!

 

[casperLennon]

_i did it November 2016. Don’t worry about it. Just do what you do at work

 

[Risteard]

Just out of interest.... why not?

Edit:-

The MCB is there to protect the cable... the fuse is there to protect the equipment.

Well, technically the fuse is to protect the cables on the load side of the fuse. Should a fuse be required for protection of the equipment then that is the responsibility of the manufacturer to fit an appropriate one. However, should the manufacturer's instructions require one then obviously due account must be taken of that.

 

[Risteard]

Just out of interest.... why not?

Edit:-

The MCB is there to protect the cable... the fuse is there to protect the equipment.

Well, technically the fuse is to protect the cables on the load side of the fuse. Should a fuse be required for protection of the equipment then that is the responsibility of the manufacturer to fit an appropriate one. However, should the manufacturer's instructions require one then obviously due account must be taken of that.

 

[Risteard]

On the spec it states heater and hot water, refer to seperate diagram. Wouldn't that be where the answer is?

You would think so, wouldn't you?

 

[Michael Bloomfield]

Hi

You would think so, wouldn't you?

The supply cable may be protected by a 16amp mcb, as its a radial 2.5/1.5mm normally if its a boiler which is being wired on a s plan system or y plan system the boiler manufacturer will specify the correct fuse size to use.
Most gas systems are 3 amp , but where i live the boilers are run on oil as there is no gas and they usually require a 5 amp fuse in the switched fuse connection unit(fused spur) hope this helps.

 

[Risteard]

Hi

The supply cable may be protected by a 16amp mcb, as its a radial 2.5/1.5mm normally if its a boiler which is being wired on a s plan system or y plan system the boiler manufacturer will specify the correct fuse size to use.
Most gas systems are 3 amp , but where i live the boilers are run on oil as there is no gas and they usually require a 5 amp fuse in the switched fuse connection unit(fused spur) hope this helps.

Oil is almost universal here. (Gas has only come in recently and not many have it yet.)

The majority of oil heating systems I have come across are protected by a 3A fuse and this never causes any problems.

Anyway, I wasn't questioning any of that. I was simply agreeing that it must be written in the heating diagrams for the AM2. (Central heating wasn't in the AM2 when I did it so I can't comment definitively. Surprised T&E has appeared in it - it's not like there's any particular skill to installing it.)

 

[Michael Bloomfield]

I h

Oil is almost universal here. (Gas has only come in recently and not many have it yet.)

The majority of oil heating systems I have come across are protected by a 3A fuse and this never causes any problems.

Anyway, I wasn't questioning any of that. I was simply agreeing that it must be written in the heating diagrams for the AM2. (Central heating wasn't in the AM2 when I did it so I can't comment definitively. Surprised T&E has appeared in it - it's not like there's any particular skill to installing it.)

have installed some Grant boiler systems where they specify a 5 amp fuse. I believe this is due to the pumps required for the oil, although I would agree I have not had any problems with 3 amp fuse, but my plumber does get on his high horse, but thats another story