1999 NEC Change Makes MI Cables More Affordable
The revision of Art. 426-28 of the 1999 NEC exempts mineral-insulated (MI) metal-sheathed cables embedded in noncombustible mediums (such as cement or asphalt) from ground-fault protection required for fixed outdoor electric deicing and snow melting equipment. Ground-fault protection devices, as the 1996 NEC requires, are incompatible with existing panelboards and increase material costs by $300 per circuit.
“MI cables are now more cost efficient,” says Ed Slagis, vice president of Delta-Therm Corporation. “The code change recognizes the inherent safety of MI heating systems by making them the only electric systems no longer requiring ground-fault protection measures.”
Made of noncombustible material and constructed of copper or copper resistance conductors, MI cables are insulated with magnesium oxide and encased in a seamless copper sheath. For more than 30 years, Slagis’ company has specialized in the design and manufacture of electric and hydraulic heating systems as well as UL-listed controls and monitor panels.
Want to use this article? Click here for options!
© 2012 Penton Business Media, Inc.
Latest Articles
Labeling tool
Feb 10, 2012 7:58 AM
Emergency lighting controls
Feb 9, 2012 8:40 AM
Cupertino Electric Sponsors Construction Industry Academic Competition
Feb 8, 2012 4:14 PM
Trending Articles
Acceptable Use Policy blog comments powered by Disqus
advertisement
product spotlight
Labeling tool
Feb 10, 2012 7:58 AM
The Rhino 4200 labeling tool features one-touch “hot keys” that quickly create and format wire/cable wraps, flags, fixed-length labels and more...
View all 2012 Product Spotlights
Free Product Info
Our Product Information site is the ultimate online resource for products and services offered by Advertisers featured in our Magazine. This service is provided as a quick and easy way to request Product Information online. Get FREE product information now.



































