Alarm and heating fused spurs

[Pete999]

Try and tell the am2 assessors that they want it done the way it says in the design spec..

For those of us that have no idea what the AM2 involves , it may have been best to explain this, rather than blandly asking about spurs for heating and alarms, sorry to seem unresponsive it's just how I see things, you must remember for some of us older folk, the AM 2 means SFA, to be blunt it was a distant blot on the horizon that many of us had not heard of.

 

[Darkwood]

A fire alarm panel should not be supplied via a switched fused connection unit or an un-switched fused connection unit.

This is what you should be installing.

Also the power supply should be in fire proof cable.

You are partially correct but it is circumstantial, you can have other isolation forms if only accessible to authorised persons switched or unswitched, it is only when accessible to unauthorised persons or general public do you need to go down the key switch option.

I would also argue that a key-switch version is essentially a 'switched fused spur' but I get what you meant

BS 5839-1 (2017) reg' 25-2 covers this area

 

[davesparks]

The mcb is a Type B16A to a switched fuse spur in 2.5mm singles and a 1.5mm cpc.

Then from the switched spur goes to a heating and hot water system with a solar panels on it aswell that’s all the spec they give no power ratings anything :/

If that is what the specifucation says then do that, don't try to vary from the spec, this is the normal way of doing it in the real world.

In the absence of any further information follow the rule of thumb that gas boilers require a 3A fuse.

 

[Adam_92]

No that’s fair enough Pete, completely understand just frustrating they don’t give anymore detail.. don’t think they can fail me on that because they’re not giving me enough information so fingers crossed

Thanks again everyone for input

 

[davesparks]

Try and tell the am2 assessors that they want it done the way it says in the design spec..

But there isn't a fire alarm system in the Am2 is there? It's just a simple self contained unit which requires a regular mains supply. I think you are confusing this with a full blown fire alarm system.

 

[Adam_92]

Yeah I as a friend told me it has fp200 in the exam so I was thinking a fire alarm buts its a carbon monoxide detector which is about 1 watt

they give you a 3A and 5A fuse maybe you don’t even need to change the one in the heating system and it’s fine with a 13A

 

[Pete999]

No that’s fair enough Pete, completely understand just frustrating they don’t give anymore detail.. don’t think they can fail me on that because they’re not giving me enough information so fingers crossed

Thanks again everyone for input

Agree good luck let us know how you get on please