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New Edition of UL 248-1, Standard for Low-Voltage Fuses

electrical

UL has released a new edition of UL 248-1, the standard for low-voltage fuses. This revision of ANSI/UL 248 – 1 is being issued to reaffirm approval as an American National Standard. The third edition can now be purchased on UL’s website.

Description*

- Partner Content -

Mastering High Voltage: The Importance of Accurate Test Equipment

This whitepaper underscores that precise calibration of high-voltage test gear — especially when measuring 1 kV–150 kV systems — is essential for safety, reliability, and regulatory compliance. It details measurement techniques (voltage dividers, step-down transformers, etc.), the impact of environmental and connection factors on accuracy, and why traceable calibration (e.g. to NIST / A2LA) is a must to ensure consistent, reliable results.

“This Standard applies to low-voltage fuses rated 1000 V or less, AC and/or DC, with interrupting ratings up to 300 kA (200 kA for Mexico). These fuses are intended to be used in accordance with the Canadian Electrical Code, Part I (CEC), and the National Electrical Code, NFPA 70 (NEC).”

*Description from UL’s website.

 

Photo by Steve Snodgrass

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