There is a new exception to National Electrical Code (NEC) article 373-5(c) which permits single entry of multiple nonmetallic sheath cables into surface mounted panelboard when the cables are protected by solid conduit or tubing.

A solid raceway, such as EMT, between 18 and 120 inches in length may enclose multiple nonmetallic sheath cables into the top of a surface mounted panel. This raceway must extend directly above the panel and must not penetrate any structural ceiling. Additionally, this exception requires the raceway end that the cables enter be plugged to prevent entrance of foreign material, and cable fill requirements of chapter 9 must be met.

Slotted Insulating Bushings for use with EMT, cat. nos. SIB-050 thru SIB-200, manufactured by Bridgeport Fittings meet the intention of this code exception without the need to seal the end with duct seal compound or other materials.

These Bushings are designed to separate the cables to reduce heat build up and to seal around the cable without compound. Each Bushing is marked with maximum cable size.

Always use Bridgeport's Slotted Insulating Bushings

Note: Above comments are not an interpretation of the National Electrical Code (NEC) or local regulations. Always consult your local electrical inspector for requirements in your area.

Please send your comments and questions to attn: Engineering at Bridgeport Fittings, Inc., Phone 203.377.5944, Fax: 203.381.3488 or email: eng@bptfittings.com