TheScullster wrote:
Hi all

As the subject header really.........
Our CH boiler is wall mounted just inside the back door. Unfortunately this
is really the only obvious place for an alarm keypad but I am concerned
about routing the keypad cable close to the power supply to the boiler. As
this is a single storey extension with solid floor, both cables must come
down the wall (chased in) from above.
Anyone know how much of a problem this is likely to be or what amount of
separation is necessary to avoid the power cable affecting the alarm?

TIA

Phil


The alarm cable and the mains cables need to be segragated (minimum 50mm
lateral separation) or else insulation on the extra-low voltage cable
needs to be rated for 300/500V.

See he (may not be 17th edition compliant)

http://www.tlc-direct.co.uk/Book/6.6.1.htm

You are unlikely to experience interference problems. In this case, the
segragation is mainly for safety.