maybe to you 100metres is small amount of cable but thats alot more than i would need 25m of 4mm swa £62inc vat at screwfix.but iwas really meaning the short extension cable 16 amp 14 metre £25
ooh dear [panicking] Quote ''I have seen twin fail in a couple of years due to weathering'' if it only lasted 2 yrs it must have been cheapo 5hyte, I have 6mm overhead to my workshop [ex cowbyre] farm building, & it was installed over 25 yrs ago & is still o-k, perhaps the pvc was better quality in those days!!