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Monthly Archives: July 2011

A Critical Look at Load Side Utility-Interactive PV Inverter Connections 690.64(B) / 705.12(D)

The NEC in sections 705.12(D) / 690.64(B) allows utility-interactive photovoltaic inverters to be connected on the load side of the service disconnect. This requirement...

Risk comes from not knowing what you’re doing

So says Warren Buffett, one of the world’s most successful investors. His biography underlines this belief by telling how, since age 11, he has...

When is the 2011 UL White Book available, and what is new for 2011?

Question When is the 2011 UL White Book available, and what is new for 2011? Answer The 2011 UL White Book started distribution April 1, 2011. The...

Has UL investigated the effects of spray-on foam insulation on Type NM cable jackets...

Question Has UL investigated the effects of spray-on foam insulation on Type NM cable jackets or individual conductor insulation? Answer UL has not specifically investigated the effects...

10 Ways to Protect Your Family from Fires

According to the National Fire Protection Association (NFPA): In 2009 there were 1,348,500 fires reported in the U.S., resulting in over 3,000 deaths, in 17,050...

Safety and performance of Codes

Any electrical design and installation is based on a number of conditions. Traditionally, such conditions include reliability, performance and economics. Usually these conditions are...

IAEI West Virginia: Getting Back to the Grass Roots of Safety

New electrical contractors enter our markets every year; these individuals perform work that electrical inspectors ultimately review. Involvement in activities in which these individuals...

What’s Wrong with Rule 14-100?

Rule 14-100 has requirements for reducing wire sizes connected to splitters, junction boxes and for control circuits such as pushbutton stations. The rule prescribes...

Are You the Weakest Link?

Good workmanship requires that the professional electrician make sure that equipment is suitable for the installation and used in ways that comply with applicable...

Gratitude – the Common Denominator between Giving and Safety

Recently I found myself attempting to explain to a close friend and business associate why I left my job to start a new line...
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