MP insulators
Here is a set of Missouri Pacific insulators mainly found in the 1990s when Union Pacific was removing code lines from several different subdivisions throughout Missouri and Illinois.
The white style on the left was used on the lower voltage power circuit located at the end of a lower arm. The second and fourth ones here, were used on the signal code circuits. They were made by different manufacturers. The cable tie insulators third in line was used on the top arm on some lines, where the 600 volt power ran. Not all MP lines had the 600 on top construction.
The first, third, and fourth insulators were made by General Porcelain Co, and the brown ones could be found sporting G.P.Co. rather than MP. I always hoped to find one marked with both, but never did. MP markings varied from being on top, on the side of the dome, and on the skirt, sometimes upside down. The markings on the 600 volt insulator were often very weak to unrecognizable, making finding them difficult despite the insulator itself not hard to find.
MP insulators
Here is a set of Missouri Pacific insulators mainly found in the 1990s when Union Pacific was removing code lines from several different subdivisions throughout Missouri and Illinois.
The white style on the left was used on the lower voltage power circuit located at the end of a lower arm. The second and fourth ones here, were used on the signal code circuits. They were made by different manufacturers. The cable tie insulators third in line was used on the top arm on some lines, where the 600 volt power ran. Not all MP lines had the 600 on top construction.
The first, third, and fourth insulators were made by General Porcelain Co, and the brown ones could be found sporting G.P.Co. rather than MP. I always hoped to find one marked with both, but never did. MP markings varied from being on top, on the side of the dome, and on the skirt, sometimes upside down. The markings on the 600 volt insulator were often very weak to unrecognizable, making finding them difficult despite the insulator itself not hard to find.