December 2008
Safe Guarding You, Your Equipment and Your Money
The NEC cares about you, not your equipment or helping you save money. That’s why Schneider Electric focuses on all three.
The National Electrical Code (NEC) was established primarily to prevent injury to people, not damage to electrical apparatuses. Its interest in the Short Circuit Current Ratings (SCCR) for the equipment or control panel is the amount of momentary electrical current a device can withstand before it will produce an uncontainable fire and/or explosion.
As the machine designer or panel builder, it’s up to you to understand the impact of the SCCR requirement of NEC Article 409, the code article that specifies the minimum requirements for an industrial control panel, and/or NEC Article 440, the code article that specifies the minimum requirements for HVAC equipment and how to meet these SCCR requirements while controlling the costs of the equipment you build or use.
Schneider Electric is dedicated to helping you understand and meet these requirements, as well as enabling you to maintain the cost of your control panel solutions. We’ve developed and tested proven combinations of products that meet varying SCCR requirements which allow you to meet the NEC’s requirements, without over engineering your panels with more costly solutions.
Underwriters Laboratories (UL) is now requiring all new equipment certifications to UL1995, UL standard for Heating and Refrigeration Equipment, to comply with and be marked with a SCCR rating.
Product Focus: The TeSys U
The TeSys® U self protected motor starter is an all in one motor starter (breaker + contactor + overload). It combines reliability, performance and durability into a single motor control solution that reduces inventory, simplifies maintenance, decreases panel space and meets global regulatory requirements (UL, CSA, IEC, CCC). It also features:
- Modularity that requires 45% less wiring time.
- Reduced downtime with immediate restart after fault.
- Robust construction with 42kA short circuit capability (130kA with limiter) and suitability for harsh environment.
- Compact design with 75% less heat dissipation.
- Complete connectivity with CANopen, DeviceNet, Profibus, ASI and Modbus all available.
- Learn more about the TeSys U.
Visit Schneider Electric’s HVAC website at www.us.Schneider-Electric.com/HVAC, contact your local sales representative or call your local Square D distributor.
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