In today’s episode of The Best of Build Show, host Matt kicks things off with an important topic for anyone living in — or thinking about buying — a vintage or historic home: electrical red flags.

Matt introduces CJ from CNC Electric in California, one of The Build Show’s master electricians and long-time contributors, who’s here to walk us through the most common and costly electrical issues found in older homes. From outdated 50-amp main services to ungrounded outlets, cloth-wrapped wiring, and undersized junction boxes, CJ breaks down what to look for, why it matters, and how to spot potential hazards before they become major problems.

Filmed on location in California’s beautiful Napa Valley, CJ takes us inside the walls, subpanels, and even up into the attic to reveal real-world examples of issues like open junction boxes, rodent damage, and improper grounding — offering practical inspection tips that every builder, electrician, and homeowner should know.
Stay connected with CJ on Instagram and watch full episodes through the links below.
CJ NIELSEN
CNC Electric