Mark C. Ode

Recently, I received a phone call from an electrical contractor friend who was discussing with an electrical inspector the differences of branch circuits supplying swimming pool equipment versus swimming pool equipment feeder...

A friend who had just purchased a 10-year-old house asked me whether he and his wife should spend money to have his electrical contractor install all the newest safety devices. We reviewed the existing equipment so I could...

With the advent and ease of online shopping, many homeowners are purchasing their own products. But is a homeowner able to distinguish a safe product that is listed and labeled from a counterfeit product that has bypassed...

Electrical contractors are becoming more involved in the design, installation and servicing of solar photovoltaic (PV) systems for residential, commercial and industrial facilities. While this may be a sideline business for...

Last month’s article covered the general requirements in the National Electrical Code for audio signal processing, amplification and sound equipment in Article 640. One of the most common mistakes many electricians and...

Have you ever walked into a room in your home, noticed dark, shadowy spots, and wished there was an easy way to add lighting in the drywall ceiling? Or have you ever wanted to add a speaker in a ceiling and connect it to your...

In 1950s and 1960s homes, lighting fixtures were often installed in the center of the ceiling with a wall switch at the room’s entrance. This worked when general lighting was required for cleaning and similar tasks that do...

When I was an electrical contractor, I tried to find a specialty where there was less competition and more profit than the normal building wiring. Many ECs doing electrical wiring for dwellings, commercial and industrial...

At the end of the 19th and the beginning of the 20th centuries, incandescent lamps and lighting were the new technology, and everyone was converting from natural gas lighting to electricity. By the beginning of the 1940s,...

With the advent of power over ethernet in the 2017 National Electrical Code (NEC) , in Article 393 of the 2014 NEC covering low-voltage ceiling grid power, and other applications dealing with power-limited circuits, there...

New lighting technology provides electrical contractors with a unique capability to redo an aging home and vastly improve the lighting system. At the same time, many aspects of an existing home, such as its construction, can...

Let’s assume a 120/208-volt (V), three-phase service was installed on a building a few years ago and the new owner of the building needs a standby generator for use during power outages. The electrical contractor installs a...