MK SPD Device in a RCBO CU - puts main isolator in 2nd place. - Chinese or what ?

Question

MK have given me a schematic to enable an RCBO only Consumer Unit on MK Sentry

This puts the main isolation physically (not electrically) after the SPD. Any experience of this on MK please ? Seems clumsy ?

Sparkingchip · Accepted Answer

That&rsquo;s how it is done, otherwise the SPD is over the busbar.

wallywombat · Answer

That's a pretty standard arrangement. Although I'd note that Wylex now do a single-width SPD with built-in fusible-link OCPD which has the L connection on the base, so it can sit directly on the bus bar.

AJJewsbury · Answer

The other way of avoiding the bus-bar would be to put the SPD at the far end - but that would increase the length of the SPD tails - which are best kept as short as possible for best SPD performance. 
 - Andy.

MK SPD Device in a RCBO CU - puts main isolator in 2nd place. - Chinese or what ?

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