Questions About Fcu

[bennynoneck]

Hi,

 

Can I just ask a couple of quick questions please? Obviously you use 2.5mm T&E cable to the FCU which feeds the alarm control panel, but:

1. What cable comes from the FCU to the control panel? If it's going to be plain old 1mm T&E can I use 1.5mm without any probs (I have a load of this!)?
2. Should a 1.5amp or 3amp fuse be used in the FCU?
3. Should the FCU be unswitched?

Many thanks in advance.

[datadiffusion]

1. Flex, I use rubber type H0R7N style

2. Totally dependent on panel, but 3A is a standard value.

3. From a security POV yes, from a latest regs POV its debatable.

[petrolhead]

If you have to ask these questions you probably shouldn't be doing electrics. Stick it on a plug or get somebody qualified in.

[datadiffusion]

If you have to ask these questions you probably shouldn't be doing electrics. Stick it on a plug or get somebody qualified in.

 

Agreed, these are 'worrying' questions but if that was the case, the OP wouldn't be asking. Not giving the information can be just as harmful IMHO.

[Adi]

If you have to ask these questions you probably shouldn't be doing electrics. Stick it on a plug or get somebody qualified in.

But what size cable from the plug.

[petrolhead]

Well normal mains cable is 3 core so 6 core must be twice as good surely?

[Adi]

I reckon you have a point there, take it we talking 6 core alarm cable?

[petrolhead]

It says alarm right in the name, it must be the right stuff

We should ask arf.

[bennynoneck]

.

I dont see them as worrying questions. You have to find out somehow and someone must have told you at one time! There are no stupid questions, otherwise some people are going to guess and guess wrong.

As for cable theres no harm in over-rating but there is in under rating. I guess 1mm flex would be suitable. Ill maybe get a metre specifically for it. I presume you can use alarm cable to the keypad.

[sixwheeledbeast]

0.75mm flex is rated to 6A.