Disabled toilet alarm

[Aaronthesparky]

Hi I’m installing a disabled toilet alarm and they need an extra beacon in the office about 100mt away. Has anyone got any suggestions as to what cable to use for this longer run

 

[Avo Mk8]

Hi I’m installing a disabled toilet alarm and they need an extra beacon in the office about 100mt away. Has anyone got any suggestions as to what cable to use for this longer run

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maybe? Or maybe not suitable?

 

[timhoward]

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maybe? Or maybe not suitable?

I must admit I had exactly the same thought before I saw your post.
They work well and the cost of them wouldn't be far off the cable and the labour.

 

[davesparks]

The same cable as you used for the rest of the system.

 

[Aaronthesparky]

The same cable as you used for the rest of the system.

Alarm cable will be used for the rest of the system. I just thought with that long a run I might need to size it up a bit. It’s 12v DC

 

[timhoward]

Now I’m awake, two more thoughts.
1 - is the same way I wouldn’t trust a nest to be a frost stat, for something like this it’s probably not good practise to use wireless.

2 - I’ve fitted a couple that are extra low voltage so volt drop over 100m needs considering

OP is this all within a building or is the office in a different building? Is it a 12/24v dc system?

 

[Aaronthesparky]

Now I’m awake, two more thoughts.
1 - is the same way I wouldn’t trust a nest to be a frost stat, for something like this it’s probably not good practise to use wireless.

2 - I’ve fitted a couple that are extra low voltage so volt drop over 100m needs considering

OP is this all within a building or is the office in a different building? Is it a 12/24v dc system?

Now I’m awake, two more thoughts.
1 - is the same way I wouldn’t trust a nest to be a frost stat, for something like this it’s probably not good practise to use wireless.

2 - I’ve fitted a couple that are extra low voltage so volt drop over 100m needs considering

OP is this all within a building or is the office in a different building? Is it a 12/24v dc system?

It’s in a factory toilet in the warehouse. Will be 12v DC

 

[MReynish6]

Is the fire alarm an addressable type? If yes, then way I’ve done it on the past is to fit an input relay onto the fire alarm, connect the toilet alarm to that, then have the fire alarm sounder in the office to activate when the toilet alarm activates. Obviously different tone etc to the normal fire alarm and a bit of fire alarm programming but has worked in some big schools etc

 

[Avo Mk8]

1 - is the same way I wouldn’t trust a nest to be a frost stat, for something like this it’s probably not good practise to use wireless.

I agree, I thought after my post that this is a safety system, and the product I mentioned is not designed for that application, so is a really bad idea!

 

[timhoward]

This may help:

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[DPG]

Maybe use the cable to switch a relay, and have the beacon powered at the remote (office) end?

And use decent gauge cable to minimise the volt drop.

 

[Avo Mk8]

Really need to know the current consumption of the sounder (sorry - beacon!) that's going to be used. The couple of piezo sounders I looked at on the interweb take 250mA to 370mA, so this may not be too much of a problem, unless the sounder is a lot more than that.

1mm sq cable would drop about a volt with those figures.

 

[DPG]

Really need to know the current consumption of the sounder that's going to be used. The couple of piezo sounders I looked at on the interweb take 250mA to 370mA, so this may not be too much of a problem, unless the sounder is a lot more than that.

1mm sq cable would drop about a volt with those figures.

Good point. Could well be not much more than a relay coil.