NEC cabling installation requirements are straightforward, but markings and new offerings may create confusion. You're not alone if markings and listings are making your plenum cabling selection a ...

While suspended, lay-in ceilings have long been the norm in commercial design, the open-plenum ceiling has become trendy and economical, particularly in office and retail environments. However, ...

While exposed ceilings in office interiors lend a spacious, open feel, this trendy architectural feature has created a new challenge: finding a viable return air path. Plenum ceilings use the area ...

Q. What wiring methods does the NEC allow above a suspended ceiling or other spaces used for environmental air? A. Electrical metallic tubing (EMT), rigid metal conduit (RMC), intermediate metal ...