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Ovens on cooker ccts

Farmboy
In domestic kitchens, what do you think of the practice of connecting ovens to 32/40A cb cooker ccts via dual cooker connection outlet plates? For example, along with a 6kw hob, a 2.5kw oven is connected via a 1.5mm2 3 core h/r flex? One view is that it's acceptable because the flex can't be overloaded and the cb provides s/c protection for the flex, nor would it be coded on an eicr.


F
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    AJJewsbury:




    what of polarity, and where is the circuit extremity for Zs



    Arguably L-N polarity reversal at an appliance won't be a safety issue to the users of the installation - since CE marked appliances generally have to be safe when connected to systems where there isn't an earthed neutral (230V between phases) or supply polarity isn't guaranteed. Provided it's OK at any single pole devices (e.g. the MCB), arguably there's no real need to check polarity at cooking appliances themselves on an EICR - as we're only required to look for defects and non-conformities that may give rise to danger.


    Likewise if the circuit is RCD protected, there's no need to verify Zs at the furthest point - a simple c.p.c. continuity check (e.g. R2 wander lead) is sufficient - see the last paragraph of 643.71 a) for TN systems or b) for TT systems.


       - Andy.

     




    Point taken, thanks.


    F

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  • 0

    AJJewsbury:




    what of polarity, and where is the circuit extremity for Zs



    Arguably L-N polarity reversal at an appliance won't be a safety issue to the users of the installation - since CE marked appliances generally have to be safe when connected to systems where there isn't an earthed neutral (230V between phases) or supply polarity isn't guaranteed. Provided it's OK at any single pole devices (e.g. the MCB), arguably there's no real need to check polarity at cooking appliances themselves on an EICR - as we're only required to look for defects and non-conformities that may give rise to danger.


    Likewise if the circuit is RCD protected, there's no need to verify Zs at the furthest point - a simple c.p.c. continuity check (e.g. R2 wander lead) is sufficient - see the last paragraph of 643.71 a) for TN systems or b) for TT systems.


       - Andy.

     




    Point taken, thanks.


    F

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