Spyder
What is the catalog number for that 32 space 100 amp load center? I don't see it in my Digest.
UL must have changed something since the number of spaces can not exceed 10% of the buss rating. A 100 amp single phase panel can have 10 circuits per buss (100 * 10% = 10), 125 amp 12 circuits per buss (125 * 10% = 12.5), 200 amp panel 20 circuits per buss (200 * 10% = 20) etc. Maybe they are using a 200 amp buss.
When ordering panelboards manufactures can get away with more spaces by using a larger buss even though the label indicates the buss is rated at the size ordered. The company I use to build most of my panelboards uses the same size buss in their 100 - 400 amp panelboards so the number of circuits is unlimited except you can't exceed 42 in on cabinet.
Curt
