7-core Armoured - Re-using

[OnOff]

I'm contemplating making use of a roll of 7-core 2.5mm sq armoured I have as in it seems a pity to NOT make use of it. It came off site where it was used as a temporary feed to some plant and I asked and was given it. Hypothetically could I pair the cores up to give 3 x 5mm sq? I was thinking sleeve them brown / black / grey then fit bootlace ferrules over the twinned 2.5's. I know some of the larger armoureds are done like this to make for easier handing. Before I even consider it (length of run, installation method, load) I'd need now it's current carrying capacity in this configuration - obviously more than 4 and less than 6mm sq but pretty sure that just doubling the rating for 2.5mm sq is maybe not the way to go! Any thoughts? Many thanks.

 

[Badger]

i would say that would be classed as 32 amp max tbh

---------- Post Auto-Merged at 16:19 ---------- Previous post was made at 16:18 ----------

think of a ring main or final final circuit

 

[m4tty]

i would say that would be classed as 32 amp max tbh ---------- Post Auto-Merged at 16:19 ---------- Previous post was made at 16:18 ----------

think of a ring main or final final circuit

Is that a ring main badge or Ring final?

 

[steptoe]

parallel conductors I would say,

Id be dubious about putting 2X2.5 into one ferrule unless its specifically designed for that purpose.

---------- Post Auto-Merged at 18:52 ---------- Previous post was made at 18:49 ----------

oh, CCC,

work it out using grouping factors,

ie, if 1X2.5 can carry 20A then calc how much you need to derate it if beside another carrying 20A, will depend a lot on VD as well along with installation method.