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Why is the Switch disconnector 2 pole device's operational voltage rating at 415V?

johnwicklover

Shouldn't the voltage between line and neutral be around 230V in single phase installation?

For example this SD 

Thanks.

 

J

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    The manufacturer will advertise the maximum rating it can be used for so as not to limit its sales. I would be happy using this on a 230V single phase system or between phases in a three phase 400V or 415V system (but not between phases on a 440V system!)

    However it is also possible that for a single phase system you only need a single pole SD. I would be more likely to be looking for a two pole SD to fit between phases than between phase and neutral.

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    The manufacturer will advertise the maximum rating it can be used for so as not to limit its sales. I would be happy using this on a 230V single phase system or between phases in a three phase 400V or 415V system (but not between phases on a 440V system!)

    However it is also possible that for a single phase system you only need a single pole SD. I would be more likely to be looking for a two pole SD to fit between phases than between phase and neutral.

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