1. Cu/Mica glass 3 layers 47% overlap/XLPE/PE Tape/LSHF/Cu tape shield 13% overlap size 2x1.5 mm2 around 6 min failed
Note: For your referrence we’ve tested Cu/Calcine mica 3 layers 47% overlap from other supplier as below construction, but test result failed after 19 mins.
1. add Low smoke tape 50% overlap over laid up core
2. Low smoke tape over inner layer 50% overlap
3. Mica with PE backed 50% overlap over Low smoke tape (or under copper tape shield)
Could you have any suggestion to pass BS 6387 cat.C for cable with Copper tape shield especially conductor size 1.5 mm2.