September/October 2012

Going to Basics, Maximum Fault Current

One of the most basic calculations for any power system, and arguably the least understood and most misrepresented, is the calculation of available fault current.

New Wiring Rules in Sections 4 and 12

Grounding and Bonding — Are we on the same page?

Radio equipment that uses a screw-type fastener to bond or attach the grounding conductor to the antenna assembly

Has UL Certified any small wind turbines?

Yes, UL has certified small wind turbines under the product category Small Wind Turbine Generating Systems (ZGEN)

Is there a way to interact with UL’s Regulatory Services Department Staff on social media?

Is it code-compliant to install Type NM cable exposed in an attached residential garage? How about a detached garage?

Fact or Fiction

We have some radio equipment that uses a screw-type fastener to bond or attach the grounding conductor to the antenna assembly. Can this screw be any ordinary screw, or does it need to be a “listed” s