Is there a standard which dictates the use of color bands for toughened glass bell suspension insulators?

Currently there are no formal standards found in either ANSI or CSA specifications that outline or require the presence of these color bands. Over their years of use, these color bands have been introduced into existence by individual consumers of toughened glass bell insulators. Some customers have made the use of color bands a requirement by incorporating them into their individual standards, therefore expanding their growth and commonality in the field. Hubbell’s standard offering is as follows:

30,000 lbs (140 kN) - Yellow Band

40,000 lbs (180 kN) - Blue Band

50,000 lbs (222 kN) - Red Band 

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