can someone say where I can get about 10m of "nycy cable"? It's screened twin to connect a Worcs/Bosch FR 10 intelli-stat to the boiler.via the 2 -wire bus. The guide says minimum spec = H05 W...(NYMH...). Need the screened version as it's running parallel to 230 mains - and partly externally.
Seems a bit heavy.
Is there mains on this cable or is it (extra) low voltage? If low, I would see no harm in using any reasonably heavy signal cable - perhaps mic cable?
If mains, how about CY or SY[1] cable - common enough and the screening, whilst braid rather than wrapped foil, should be effective.
Thanks Tim - a huge help. Intelli roomstat guide say LV while boiler install. guide says ... am still trying to sort it out :-)
Perhaps SY would be safest.
To earth the braid, gather it and twist it into a "pigtail" and sleeve it with G/Y sleeving, then clamp it in the earth terminal. If the instructions specify an earth connection at either end, use a core in addition as the braid is designed more for screen and limited protection and it's cross sectional area may be less than what is needed.
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