6mmsq

[c.k.]

One quick question, is it acceptable to use 6mmsq for a 9.5KW shower?

 

[BR]

the simple answer to your question is yes. 6mmsq is acceptable for a 9.5KW shower, however this is the max. 10sq is NOT required here but for anything significantly above 9.5KW it is.

 

[AdamW]

Surely it depends on the cable run? Just thinking, what if the shower is a long way from the CU?

How long a run does it need to be before you have to use 10mm?

 

[ban-all-sheds]

'bout 30m.

But 6mm for a 9k5 shower is borderline anyway, for any length, depending on how it's installed..

 

[securespark]

Yeah, 6 has a max rating of 46A Method 1, ie clipped direct, and a VD factor of 7.3, so 31m ish is max, but that does not take account of any correction factors, grouping, temp, etc.. or if you have a BS3036 (rewireable) fuse.

AND

You have to check that your CU and supply are up to it. If your unit has a main switch less than 100A and or a main service fuse of less than 100A then you need to upgrade. REC will help if main fuse/meter need changing.

Also, you need to update your earth bonding, both main and supplementary.