Whats an Alarm spur box? + Earth wire question.

james142 · 06-11-2012 10:31PM #1

I have a box beside my main board with a red light on it. This box is labeled "Alarm Spur" (image attached).

I couldn't find any useful info online, anyone know what it is for?

On a side note, where does the earth cable end? is it on a metal pole sticking in the ground under the house?

Thanks!

WP_000149.jpg?psid=1

KoolKid · 06-11-2012 10:53PM

I'd say its the fused supply that's feeding your alarm panel.

meercat · 06-11-2012 10:53PM

james142 wrote: »

I have a box beside my main board with a red light on it. This box is labeled "Alarm Spur" (image attached).

I couldn't find any useful info online, anyone know what it is for?

On a side note, where does the earth cable end? is it on a metal pole sticking in the ground under the house?

Thanks!

its the fused supply for your alarm control panel
if you remove the fuse,it disconnects mains power to panel

meercat · 06-11-2012 10:57PM

KoolKid wrote: »

I'd say its the fused supply that's feeding your alarm panel.

beat me to it

cant see the earth wire you are talking about,however there should be an earth wire connected to an earth rod which is driven into the ground somewhere outside your house

james142 · 07-11-2012 03:58PM

Thanks

For the earth wire question, The reason I was asking is because there is about 4 -6 earth wires connected to a copper pipe beside the immersion heater. Perhaps this is where the wires end up?

I have a pic of the pipe (you can see 4 wires connected to it, the other two are above which isnt shown)
WP_000150.jpg?psid=1

07-11-2012 06:00PM

james142 wrote: »

Thanks

For the earth wire question, The reason I was asking is because there is about 4 -6 earth wires connected to a copper pipe beside the immersion heater. Perhaps this is where the wires end up?

This is known as "equipotential bonding". It is designed to ensure that the conductive parts that can be touched simultaneously are at the same voltage.

james142 · 07-11-2012 09:26PM

2011 wrote: »

This is known as "equipotential bonding". It is designed to ensure that the conductive parts that can be touched simultaneously are at the same voltage.

SO those ground wires are only from the conductive parts in that closet?

07-11-2012 10:38PM

james142 wrote: »

SO those ground wires are only from the conductive parts in that closet?

The cables you refer to are connecting conductive parts to each other so that if you were to touch 2 or more of them a voltage difference would not appear across you (possibly resulting in you receiving a shock).

Whats an Alarm spur box? + Earth wire question.

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