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16mm2 v 25mm2 tails

stadamack · 2018-08-31 09:16:53

Hi all, For a medium size house with a heat pump, the MIC calculation allowing for diversity is at the limit for 16mm PVC insulated cable. Are 25mm2 tails being used in domestic installations with heat pumps / other than cost and workability, what are the main disadvantages using 25mm2 in place of 16mm2? Thank you,

31-08-2018 9:16am

#1
stadamack

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Posts: 6
Hi all,
For a medium size house with a heat pump, the MIC calculation allowing for diversity is at the limit for 16mm PVC insulated cable. Are 25mm2 tails being used in domestic installations with heat pumps / other than cost and workability, what are the main disadvantages using 25mm2 in place of 16mm2?
Thank you,

Tagged:

main tail 16 v 25

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Comments

#2 31-08-2018 9:52am

2011

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Posts: 12338

No disadvantage at all. I wired a few in 25 sq back in the day.
The larger cable reduces volt drop and earth fault loop impedance.

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