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Single Pole Isolation.

Does anyone actually use single pole isolation main switches in single phase TN-S or TN-C-S installations, (or just line switching in  three phase installations) where main bonding is correctly installed?

Think of the cost saving? 461.2.

Z.

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  • Just as an aside, I've never understood why the N must be switched only for singe phase installations - if you're worried about dangerous voltages on the N (e.g. due to PEN fault), wouldn't the same rationale apply to a TP household?

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  • Just as an aside, I've never understood why the N must be switched only for singe phase installations - if you're worried about dangerous voltages on the N (e.g. due to PEN fault), wouldn't the same rationale apply to a TP household?

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