supply of rotary switch heavy duty 300 amps capacity, 2 pole , 4 position, 3 disc, 3 way with off , universal mounting in open execution with capstan handle suitable for 250 v dc conforming to is:13947-1993, with following sequence of contacts, position 1- 12 o clock off, position 2- 3 o clock 1a, position 3 - 6 o clock .2b, position 4 - 9 o clock 1a, 2b, terminals 1, 2 must be shorted externally with suitable copper links icf approved makes of m / s salzer , l&t & kaycee supplied by oem or authorised dealers shall only be accepted. [ warranty period: 30 months after the date of delivery ] => limited