Just tighten the metal fittings! No need to bare ground wire.
As a conductive sleeve is applied around the outer layer, the grounding can be completed just by tightening the metalic joint (when the resistance value is 9×106 Ω or less, and the whole length is 15m or less).
Specifications: Working temperature limit: Between -5℃ and + 60℃
|Nominal designation||Inner diameter(mm)||Outer diameter(mm)||Regular size(m)||Maximum working pressure MPa at 20℃||Minimum bending radius(mm)||Regular size weight(kg)|