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Wiring of a Honeywell wireless cmt921 thermostat

Discussion in 'Electrics UK' started by jonnybegood, 25 Jan 2008.

  1. jonnybegood

    jonnybegood

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    I have just bought this honeywell RF stat and looking through the installation manual I cannot understand the wiring arrangement for the receiver, I am going to use 2x 2 core heat flex cable (1 for the voltage free switch and the other for L&N).

    Anyone installed these willing to share the diameter cable used for each connection, the manual seems to point towards 1.5mm - 2.5mm core for the L&N with outside diameter of less than 7mm, whilst the voltage free switch of greater than 7mm.

    I am connecting to a 3amp protected combi boiler, any idea on cable size?

    Rgds
     
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  3. gas4you

    gas4you

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    0.75mm heat resistant flex
     
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