If a protective device rating is marked on an appliance, the branch-circuit overcurrent device rating shall not exceed ___ % of the protective device rating marked on the appliance. Article 422 covers ...

Article 440 applies to electrically driven air-conditioning (A/C) and refrigeration equipment. Each equipment manufacturer has the compressor motor built to its own specifications. The motors are ...

I continue to be surprised by how many equipment designers are confused by UL circuit protection standards. In trying to meet conflicting standards, engineers may actually decrease the level of ...

Often, little things make a big difference in a successful design. When it comes to telecommunications equipment, the incorrect specification of a circuit breaker can lead to unnecessary system ...