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What is the K rating of a standard EX Transformer?

Issue:
On a standard EX transformer, what is the K rating?

Product Line:
Low Voltage Transformers

Environment:
EX Three Phase General Purpose Dry Type 600 Volts and Below

Cause:
K rating of the standard EX Transformers

Resolution:
Our standard EX and EXN Transformers not ending in NL (k4) or NLP (k13) are considered K-1 rated Transformers.