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How can I select a Square D MCB?

There were many variables and circuit breaker properties that need to be specified first. Please find attached the Square D MCB catalogue to help in the selection process (refer to Multi 9 System US Catalog 2014.pdf) 
  1. What are the breaking capacities of these MCBs? Please refer to pages 14, 15 and 16 for more details. 
  2. What standards should these breakers comply with (UL 489/CSA C22.2 No. 5 OR UL 1077/CSA C22.2 No. 235 OR IEC 60947-2)? Please refer to page 13 for more details. 
  3. What is the type of the terminal connection for these MCBs (Box lug, Ring Tongue, Fingersafe Ring Tongue)? Please refer to page 17 for more details. 
  4. What are the breaking curves of these breakers (Curve B, Curve C, Curve D,...etc)? 

You will also find the P/Ns in this catalogue. So after completing the specs, you will be able to identify the P/Ns of the requested products.
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