supply of rotary switch heavy duty 300 ampsrotary switch heavy duty 300 amps,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:139 47-1993 with following sequence of contacts. position 1-12 o clock off, position 2-3 oclock 1a, posi tion 3-6 o clock 2b & position 4-9 o clock 1a&2b. terminals 1,2 must be shorted externally with sui table copper links. icf approved makes of m/s. salzer & kaycee supplied by oem or authorized dealers shall only be acceptable. [ warranty period: 30 months after the date of delivery ] ]