Rail jumpers with rail clamps at both ends with 03mtrs Cable length as per RDSO Drawing. No: RE/ 33/ P/ 500, RE/ 33/ P/ 501 and RE/ 33/ P/ 504 or latest with necessary test and guarantee certificate. And Cable should be of Single Core Flexible Multi- Strand Annealed copper cable as per IS- 1554 ( PT- 1 ) 1988, size 248/ 0. 45mm with Heat Resistive PVC insulation, Voltage Grade- 650/ 1100V.