max shower cable length

[kirkgas]

hi, i intend to exchange shower unit in the bathroom, existing shower is connected by about 12m of 6mm2 cable, what is the max kw shower i can connect to this, or should i just upgrade to 10mm as some of the 9.8kw mira showers ay they need 10mm2
ta

 

[EFLImpudence]

One of the regulations state that you 'shall take account' of manufacturers instructions.

Having said that the 6mm² cable has a current carrying capacity in ideal conditions (i.e. not through conduit or insulation) of 46A.
That is 10.58kA @ 230V. Although unwise to be 'right on the limit'.

Through conduit - 38A
Through insulation - could only be 23A

10mm² cable would obviously be better.

Cable length of 12m is well within any limitations.

 

[ban-all-sheds]

• //www.diynot.com/wiki/electrics:mcbtocable
  
  
• http://www.tlc-direct.co.uk/Book/4.3.1.htm
  
  
• http://www.tlc-direct.co.uk/Book/4.3.11.htm
  
  
• http://www.tlc-direct.co.uk/Book/5.3.1.htm
  
  
• http://web.archive.org/web/20080213151445/http://www.kevinboone.com/cableselection_web.pdf
  
  
• http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html