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EF: When do Neutrals need to be switched?

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EF: When do Neutrals need to be switched?

M

MaintenanceSpark

When do Neutrals need to be switched?

Sorry if this is a silly question but I can’t get an answer from colleagues as it’s a “I dunno”. So I thought I’d ask here!

Some of our TPN DB’s have a 3 pole main switch with a block for the neutral. Other TPN DB’s we have here have a 4 pole main switch which switches the neutral.

It’s the same for our machine isolators. Some have a 4 pole rotary switch and others have a 3 pole rotary switch with a connector block for the neutrals.

When do we need to switch neutrals & why?

Apologies again if it’s a silly question or something I should already know. I’d like to learn.

Thanks guys.

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