2007

Is a CE Mark the same as a NRTL mark?

Are concentric and eccentric knockouts on panelboards Listed for bonding at over 250-volts? How about on outlet boxes?

The Nature of the PV Module: Limited Currents Have Benefits and Drawbacks

Battery Rooms – Accidents Waiting to Happen?

Inspecting to the 2008 National Electrical Code

Let’s take a brief look into the future and explore a few of the new items one will find when inspecting to the 2008 NEC.

Critical Systems Case Study: Ultra-Low Harmonic Drives Protect Transformers and Power Grid

Electrical Design Considerations for Educational Facilities

If underground service entrance cable Type USE conductor insulation is not marked as an RHW conductor, can USE cable be used inside for premise wiring?

Has UL listed any CSST? Does UL list connectors to bond CSST?

Section 28 Motor Wiring Methods