Greetings, I have a new product that includes an off the shelf UPS that is rated for 230V ac operation and has an internal single pole circuit breaker on the mains inlet. We want to target this product world-wide. The UPS presently is CB and certified to EN60950 european only. For North America we want it to have UL1950, and to obtain this, UL is demanding the breaker be double pole. Many of our existing products (including this new product) employ SMPS type power supplies that are fused on the line side only, yet they are certified to EN60950, UL1950 and CB. How can these products be acceptable yet another cannot?
Am I missing something? I'm confused. (no pun intended :) Kyle
