Cindy,

If you would like some additional information, please see my reply to GWZ on this topic and the additional information links for Bussmann information. Hopefully this will help.

Link for reply to GWZ: https://www.electrical-contractor.net/ubb/Forum7/HTML/000167.html

p.s. we also have a on-line training presetation (Interrupting Rating Review & Series Rating) on this topic. Check it out if you have a high speed internet access, because it is a large file (7.5Meg). See this link for it...http://www.bussmann.com/services/training/

Thanks,
Dan