1. Safety in power supply
2.Simpleness in installation,low requirement to enviroment
3.Excellent shock resistance

1.Insulation resistance≥200ΜΩ.

2.Insulation withstand voltage≥3.5KV/5min

3.Excellent air tightness and water proofing quality. When immerge branch joint into water, measured insulation resistance between water and cable core, and power frequency withstand voltage meet the insulation resistance of item 1 and 2.

4. Little contactresistance of branch joint. the ratio value of contact resistance VS. reference resistance of equal length branch line is equal to or less than 1.2.