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Cable run through isolator/ contactor

Baldyhugh
Hi


Just looking peoples opinions on the following. I have a motor to connect via dol starter and plan to do as follows. Conduit dropping down from steel trunking to rotary isolator, out of bottom of isolator into top of dol starter. However as the motor is in an adjacent room, the supply from the contactor to the motor has to go back up into the trunking to get to it. I plan to run this cable back up out of the top of the contactor and through the isolator and up the same conduit as the supply cables. This would mean that the isolator is being used for ‘through wiring’ which has been frowned upon. I don’t really want to have to run a separate conduit out of the contactor back up into the trunking. Does anyone see a problem with this plan?


Thanks


Peter

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  • 0
    Agree - though I'd add a rider about it all fitting in such a way that things are not too squashed, cable ratings are still met with grouping factors etc, and there is no scope for future mainatainence confusing the incoming and out-going cables in a way that could leave the load side of the isolator live - I suspect that would be a pretty dim mistake, but perhaps labels 'supply' and 'load' if the threading up order means there have to be joints in the switch box. (I'm not sure that there need to be in this case, it is more of a general note)
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  • 0
    Agree - though I'd add a rider about it all fitting in such a way that things are not too squashed, cable ratings are still met with grouping factors etc, and there is no scope for future mainatainence confusing the incoming and out-going cables in a way that could leave the load side of the isolator live - I suspect that would be a pretty dim mistake, but perhaps labels 'supply' and 'load' if the threading up order means there have to be joints in the switch box. (I'm not sure that there need to be in this case, it is more of a general note)
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