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Zinsco Sylvania GTE identifying Label (C) J Simmons D FriedmanIdentify Zinsco & GTE Sylvania-Zinsco
Electrical Panels & Circuit Breakers

  • POST a QUESTION or READ FAQs about the identification of Zinsco, Sylvaniz-Zinsco, and Kearney Electrical Panels - Zinsco-look alike Electrical Panels and Circuit Breakers

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Zinsco circuit breaker & electrical panel identification guide:

How to Identify Zinsco & Zinsco-Sylvania & GTE-Sylvania-Zinsco Electrical Panels and Circuit Breakers. How to Identify Zinsco-like Sylvania Electrical Panels and Circuit Breakers. Magnetrip circuit breakers - photogarphs, identification. Photos of labels and markings that identify Zinsco and Kearney electrical equipment.

Here we provide text, labels, and equipment photographs used to help identify Zinsco and GTE-Sylvania-Zinsco electrical panels and circuit breakers, and we include photographs of a Zinsco look alike marketed by Kearney.

We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

5 Ways to Identify Zinsco, Zinsco-Sylvania, GTE-Sylvania-Zinsco, Kearney Electrical Panels & Breakers

Zinsco electrical panel label (C) InspectApedia.com

To identify a Zinsco or Zinsco Sylvania or Kearney electrical panel look for the following:

1. The word Zinsco on the panel door tag, on panel labels or data tags (Zinsco panel label photo above). [Click to enlarge any image]

2. The word Magnetrip embossed in the steel electrical panel cover or on data tags in the Zinsco electrical panel. (Zinsco electrical panel photo below)

Zinsco Magnetrip panel lable © D Friedman at InspectApedia.com

3. The characteristic colored red, green, blue toggle switches on the circuit breakers in the Zinsco electrical panel. (Photo below)

Colored breakers help identify  Zinsco or GTE Sylvania Zinsco circuit breakers (C) Daniel Friedman Zinsco circuit breaker toggle switch colors (C) InspectApedia.com

However as you see above, some Zinsco or GTE Sylvania Zinsco circuit breakers and their toggle switches are solid black. So don't assume that all-black breakers can be excluded from this group.

4. The unique vertical thin-edged bus bars (aluminum, plated aluminum, or in older Zinsco panels copper bus bars (inside the panel accessed by a licensed electrician).

Watch out: do NOT try to open up your panel nor to remove circuit breakers yourself. There is live voltage in the panel interior - you could be shocked or killed. Never insert any tool nor your fingers into the interior of an electrical panel.

Thin on edge bus bars in a Zinsco or GTE Sylvania Zinsco panel (C) Daniel Friedman at InspectApedia.com

Electrical panel interior access should be by a licensed and trained electrician. Photo courtesy Tim Hemm cited at references at the end of these articles.

5. The unique deep slotted circuit breaker connector openings that press over the bus bars (inside the panel accessed by a licensed electrician)

Below is an enlargement of the the bus-connection section of a classic Zinsco circuit breaker - showing the difference between these devices.

Zinsco circuit breaker close-up showing bus connection (C) Daniel Friedman

Just below, the photo of a recent GTE Sylvania Zinsco circuit breaker burnup is shown here courtesy of Jeff Weissman and observed, he reports, in a GTE-Sylvania electrical panel.

GTE Sylvania Zinsco breaker (C) J Weissman D Friedman

This gray circuit breaker may have been installed in a GTE-Sylvania electrical panel but is breaker did not use the Zinsco-design circuit breakers and/or may be of a different brand or manufacture.

Zinsco electrical panels were distributed in the United States, primarily in the Western states.

Some Zinsco electrical panels include an embossed "Magnetrip" label in the panel cover (photo, above left). Other Zinsco electrical panel identification and information labels are included in this article.

[Click to enlarge any image]

IDENTIFY Zinsco HD - 4032 400 Amp, 2 pole, 240V AC Electrical Panel

400A Zinsco in a Georgia kitchen (C) D Friedman, R Sims.

Above and below, courtesy of Richard Sims, we include photographs of a 400A 240V Zinsco Electrical Panel that was property of the Georgia (USA) Power Company, including identifying Zinsco labeling. The Zinsco panel exterior (above left).

400A Zinsco in a Georgia kitchen (C) D Friedman, R Sims.

The photo above shows the distinctive operating handle on the door of this Zinsco electrical panel.

Zinsco 400A panel in Georgia (C) D Friedman R Sims

Here (above and below) we show external and internal identification labels for this 400-Amp Zinsco electrical panel. The electrical panel is also tagged with the electrician's card, Jim Wise, owner, Wise Electric.

Zinsco 400A panel in Georgia (C) D Friedman R Sims

Below we show the interior of this 400Amp Zinsco electrical panel.

Zinsco 400A panel interior (C) Daniel Friedman R Sims

Contact Us with field reports and photos. We are pleased to credit and link-to contributors.

Zinsco 400A panel interior (C) Daniel Friedman R Sims

Other Sylvania Electrical Panels & Circuit Breakers

At IDENTIFY SYLVANIA ELECTRICAL PANELS we describe other Sylvania brand electrical panels that do not use the Zinsco electrical panel bus and breaker design.

Frank Adam Electrical Panels - Frank Electrical Panels

Frank Adams Electrical panels were installed in buildings in the U.S. roughly between 1900 and 1970. Research is underway. Contact us if you have photos of a Frank Adams electrical panel or other details.

Details are at HISTORY of ZINSCO ELECTRICAL PANELS

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Continue reading at IDENTIFY GTE SYLVANIA-ZINSCO PANELS or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES below.

Or see IDENTIFY ZINSCO SYLVANIA METER BASE

Or see this

Zinsco Electrical Panel Article Series

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INDEX to RELATED ARTICLES: ARTICLE INDEX to ELECTRICAL INSPECTION & TESTING

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