External Isolator Switch

woosman · 19 Sep 2010

Hello all, please can you help with the correct wiring of a 3 pole external isolator switch. Carrying 32a from 10mm armoured cable to power a hot tub.
Inside the switch box are 4 connectors top ( L1 L2 L3), 4 connectors bottom (T1 T2 T3) both top and bottom have 1 connector which I am assuming is switched another way as it shows a switch on the box.
To the left of the connectors are 2 seperate connections showing Earth and N.
I only have the supply in and 1 load out.
Any help would be greatly appreciated.

Steve · 19 Sep 2010

You have there a 3 phase isolator.

You only have one phase to switch.

But I suspect your hot tub requires poth poles to be disconnected. In which case you connect your live and neutral across two poles of the switch, and the earth to the earth terminal, to ensure constant continuity.

woosman · 19 Sep 2010

What would the switch section be for on the very right of the isolator?
would that be a for a switched live or suchlike?

flameport · 19 Sep 2010

Please get someone who actually knows what they are doing, before the users of this hot tub are seriously injured or worse.

Mistakes with electrical circuits are always bad, but for a hot tub, you really cannot afford to get it even slightly wrong.

Lectrician · 20 Sep 2010

The far right hand pole with 'a switch' marked on it is the neutral. Your other three poles are for the three phases.

If using it for single phase you would normally place the lives into far left pole, and the neutral into the third pole.

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External Isolator Switch

woosman

Steve

woosman

flameport

Lectrician

DIYnot Local

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