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Discuss Consumer Unit replacement cables not long enough. in the Electrical Forum area at ElectriciansForums.net

FatAlan

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Trainee
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Ok, so you have a motley collection of old BS3036 fuse boxes that need to be replaced by a new consumer unit. Existing installation tests all good but the T&E coming out of the wall is spread out and not long enough. What do folks do to extend cables or what’s the recognised best practice to ensure a neat and compliant job? Any pics?
 
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buzzlightyear

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Arms
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Move the cu to the write height.
Move the wall.
Extend the cable.
Junction boxes.
And the list goes on what would you like to know.
 
Last edited:

Andy78

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If they all need extending then a dinrail enclosure would be best. Either use dinrail connectors or wago 221 cradles.
 

Midwest

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Connectors and/or rewire initial legs. If its every circuit, separate enclosure as already suggested
 

FatAlan

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Trainee
  • Thread Starter Thread Starter
  • #7
Obsolete VOLED and no RCD. Was on a TT with very high Ze. Couldn’t locate the earth rod and suspect it’s burried under old extension. DNO has now put in a PME connection and Zs now good.E27A298A-BEF3-45C7-9615-F34C3BA0D7CE.jpeg
 

FatAlan

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Trainee
  • Thread Starter Thread Starter
  • #12
Reckon the top box will be ok but the three circuits from below could be extended. Just looking for views on seperate enclosure, and connections really. Extending initial legs not option as classic case of client having loads of work and decorating done without thinking about the electrics until too late :rolleyes:
 

Richard Burns

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For only four cables needing to be extended upward I would just put a junction box on the wall at the point of the lower consumer unit and push fit wire connector the cables upward to a new CU at the MEM board position. It hardly justifies the use of a DIN rail enclosure, though it would be neat.
 
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