screened 6 core cable

[Guest livewire]

Could someone please advise where can I order some screened 6 core cable from.

Tried a few suppliers, but to no avail. only standard they keep in stock.

I am just re-wiring my system and since I am not able to avoid proximity of some of the mains cables have to go for the screened type...

rgds

[Guest livewire]

Could someone please advise where can I order some screened 6 core cable from.

Tried a few suppliers, but to no avail. only standard they keep in stock.

I am just re-wiring my system and since I am not able to avoid proximity of some of the mains cables have to go for the screened type...

rgds

22717[/snapback]

Ooops! I should have placed this in general queries, could admin do so please?

thanks!

[Guest]

i find screened cable the source of most problems..

[Guest livewire]

i find screened cable the source of most problems..

22725[/snapback]

Any other suggestion then?

As I said I am unable to avoid crossing mains wires under the floor boards.

Is there any other cable that would be suitable?

I must admit I had a standard 6 core cable installed for years and had no problems with false alarms even though that it run next to or been crossing mains cables. Now I need to install sensors in additional locations, so a bit more concerned about this issue since I read here on the forum about it?

[Guest]

when crossing a mains cable bend the cable over at right angles..

[Guest RICHL]

To be honest, and I'll probably get flamed for this, but induced a/c is only really a problem for poor quality panels and passives.

As long as you're using good quality stuff you really should'nt need screened cable on a domestic installation, unless the cable is carrying data. On longer cable runs EMI is more of a problem than a/c.

I would use eight core is you need six and earth the spares. Just before you put the lid on measure the induced a/c and make a note of it. If you then have an fa then re-measure and fit an ACT1313 if you want.

[Guest]

very true

[Guest livewire]

thanks for your help!

I take this should not be an issue with Scanny 9751, I may also look into getting an expander for wireless for this panel.

[Guest RICHL]

IIRC most scanny panels deal with induced a/c anyway.

And avoid wirefree unless the site makes cabling impossible.

[Guest]

i find screened cable the source of most problems..

22725[/snapback]

Few tips to get rid of this kind of problems:

1) Use safety isolated transformers (like LF9968)

2) Do NOT put them into any casing

Now you will have safe voltage and panel/casing don't have to be earthed!

3) Use screened cables.

4) Connect screens to the panel earthing pin and/or casing (DO NOT earth them)

5) When you continue wiring, don't forget to connect screens together :!:

This will cause screened cables to have its own capasitive mass.

Earthing screened cables will absolutely cause troubles due to earthing current, which causes the noise.

This is how I do it. No problems having alarm cables running next to 300Amps 230/400V AC cable.