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Band I / Band II cct separation

Farmboy
Does the principal of Band I / Band II  cct separation re 528.1 apply within equipment? A DETA mechanical chime with internal transformer has LV and ELV wiring right near each other within the same enclosure (the lid of which is easily removable without tools), which seems to moot the requirement to have them separated as per the reg?


F
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    Sparkingchip:

    Screened as opposed to armoured or is the a combination of both?


    I have installed standard Cat cable and armoured Cat cable, but presume neither are suitable for use within a consumer unit. 


    Andy Betteridge 




    If the cable is not rated for the highest voltage present, then you could create a new "wiring system" for the cable within the panel, i.e. its own containment, perhaps flexible conduit, but more usually in a control panel, say, dedicated [slotted] trunking, to help achieve the separation for safety. This is what usually happens in control panels to EN 60204-1 and/or EN 61439-series.


    It's really no big deal, provided the safety and EMC requirements are met. Even with the EMC, there are conditions for zero separation in BS EN 50174-series, which can be applied more easily to CATx cables used for Ethernet networks.

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  • 0

    Sparkingchip:

    Screened as opposed to armoured or is the a combination of both?


    I have installed standard Cat cable and armoured Cat cable, but presume neither are suitable for use within a consumer unit. 


    Andy Betteridge 




    If the cable is not rated for the highest voltage present, then you could create a new "wiring system" for the cable within the panel, i.e. its own containment, perhaps flexible conduit, but more usually in a control panel, say, dedicated [slotted] trunking, to help achieve the separation for safety. This is what usually happens in control panels to EN 60204-1 and/or EN 61439-series.


    It's really no big deal, provided the safety and EMC requirements are met. Even with the EMC, there are conditions for zero separation in BS EN 50174-series, which can be applied more easily to CATx cables used for Ethernet networks.

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