Founded by Hubert Miles, Certified Master Inspector. An expert who opens the electrical Photographs of Zinsco Sylvania and GTE Sylvania Zinsco electrical panel labels courtesy of J. P. Simmons. But current electrical needs have become greater over the years and these panels are simply not up to code. [DF NOTE: I do NOT recommend this obsolete publication, though it was cited in the original. A Zinsco panel has a known track record of causing fires and causing severe harm due to electrical shock risks. "Electrical System Inspection Basics," Richard C. Wolcott, ASHI 8th Annual Education Conference, Boston 1985. This type of panel was mainly installed in the 1970's. Besides looking at the label of the panel for the name, this panel has pastel colored breakers that are in one row down. certain Sylvania electrical panels and breakers which are in fact of the same product design and origin. 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. There is no and was no GTE-Sylvania Zinsco electrical panel recall that would help you out with replacement costs. Zinsco 100-125 amp Circuit Breaker Panel Dead Front Cover $125.00 $28.75 shipping ZINSCO DEAD FROT COVER 125A 120/240V 1 PH 16 SPC LONG 19 3/8 WIDE 6 $125.00 $28.75 shipping Zinsco Magnetrip Load Center Panel Cover Dead Front $74.95 $24.99 shipping ZINSCO SWITCHGEAR COVER 600A MAX. Please see ELECTRIC PANEL AMPACITY for more detailed help in answering your question. The Challenger panel was installed in thousands of homes between 1980s to 1990s. There were a few still being installed later, but they are rare. or LK-22 Lug Block for Mains w/ LK-15 - 150 Amps; No. Zinsco electrical panels are obsolete. Free shipping for many products! Schedule online today and get an additional 10% off of your trip charge! 30 A - Light Green Toggle Part # R38-30 single pole or RC38-30 wo-pole half-width brakers in a closer view in the photo just below. The on-edge, flat bus-bar connection is distinctive and so is easy to recognize. Use GTE Sylvania Circuit Breakers Type Q, QC, R38, RC38,and HRGF. Is this 100 amp breaker from 1965 a zinsco breaker? Above is an example, a Zinsco R38 Tandem circuit breaker sporting light blue toggle switches. - and then look for remodeling and renovation dates on the panel and in the home's documentation. Kosup, Russell R. MULTIPLE CAPACITY CIRCUIT BREAKER [PDF] U.S. Patent 4,187,482, issued February 5, 1980. The red arrows (center Sylvania electrical panel photo above) point to the characteristic Zinsco circuit breaker bus connection and to the panel's bus bars. Some Zinsco electrical panels include an embossed "Magnetrip" label in the panel cover (photo, above left). Never insert any tool nor your fingers into the interior of an electrical panel. The panel labels may identify it as "Sylvania", Sylvania-Zinsco, or GTE-Sylvania-Zinsco, but 20 March 2015. Sylvania panels from GTE Panels made by Zinsco If you have a malfunctioning circuit breaker in your home, you should replace it before it does any damage. Photo of a recent GTE Sylvania Zinsco circuit breaker burn up courtesy of Jeff Weissman. Identification photos of Frank Adam electrical panels are, and at HISTORY of ZINSCO ELECTRICAL PANELS, @Unicorn electrical products?, GTE-Sylvania / Zinsco Panel Identification Pictures Below is a close-up of the bus connection end of a classic Zinsco circuit breaker - showing the difference between these devices. Zinsco panels were designed at the beginning of the 20th century, a time with no computers, TV sets, washing machines or many of the appliances that make our day-to-day life so much easier. Product information Technical Details Additional Information Warranty & Support If the panel you describe is of the classic Zinsco design described in these pages there is risk of breaker-bus arcing and the other hazards described for Zinsco. Also it was interesting that a New York Electrical Engineer performing independent tests on samples of used circuit breakers of a variety of brands found in very preliminary testing was that there were a few other contemporary panel/breaker products that appeared to have high (compared with overall industry) no-trip rates. 4. HISTORY of ZINSCO ELECTRICAL PANELS at https://inspectapedia.com/electric/Zinsco_Electrical_Panels.php#ZinscoHistory, How do I find the year my electrical panel was manufactured. zinsco still make 35 amp breakers? I've been conducting professional home inspections since 2002. Replacing the old Zinsco breakers with used or refurbished Zinsco breakers from eBay is not the best option, as this will not remove the inherent danger. I see it's in Fairfax Virginia (my home for many years) and I'm guessing from the electrical inspector's tag that the home or at least the panel is from 1976. If this were my electrical panel I'd replace it. by (mod) A more common complaint about these breakers is that they are loose and easily fall out, and without the panel cover on dont make good contact with the bus bar. There is live voltage in the panel interior - you could be shocked or killed. Victor [by private email] 10 September 2015. Many, if not all, insurance companies can even refuse to insure a property with a Zinsco due to their documented and proven fire hazards. this is the dryer outlet, and our dryer is a 24-amp appliance, so no problem there. They named their product "Challenger". Depending on the panels amperage (150A or 200A panels will cost more), additional electrical upgrades may also be necessary. The photo above shows the distinctive operating handle on the door of this Zinsco electrical panel. "How to plan and install electric wiring for homes, farms, garages, shops," Montgomery Ward Co., 83-850. Watch out: the panel looks corroded, rusty, unreliable as a brand-independent hazard, and of course Zinsco breakers and panels are unsafe in any event. This is accomplished, in brief, by providing a breaker having a switch unit by which shunt current paths of different resistance can be selectively connected in parallel across the current path in which the current is sensed for activating the trip mechanism at a predetermined current level. On 2020-12-04 by (mod) or LK-22 - 225 Amps, MLB20(30-40) 225A Max (with CU conductors) or 208A (with AL conductors). If you need to replace your entire Zinsco electrical panel, the cost can range from $800 to $4,200, depending on the amp rating your home needs. It is best to avoid buying used Zinsco breakers. Aluminum has a useful life of approximately 30 years. Those red and light blue (?) It drops a dead short across the circuit and measures trip current and time to trip. It looks like I have the unsafe Sylvania GTE panel. It seems that the problems stem from aluminum parts within the panel. This site includes photos of what happens if an electrical panel fails. Replacing a Zinsco breaker panel is often worth it, as the older panels can be unreliable and may not meet current safety codes. I can ask Dr Aronstein if he can test this Sylvania - Zinsco electrical panel before we disturb conditions by actually pulling breakers. Check the Breaker for Damage It's Best to Replace the Entire Panel Conclusion Ways to Remove a Zinsco Breaker We have an affiliate partnership with Networx. I am wondering if there is a way to tell if this is a Zinsco brand. Model# is MT12MBB and House was built in 1977 in San Mateo County, California, USA. As a consequence of this, in Ontario we had to mount drywall behind panels for years. There were problems found with our air handlers and they were wondering if that is what caused this Ark. I wanted corroboration so I could be sure I wasn't buying something that I really didn't need. I have searched the web and cannot find any of the identifying marks of a Zinsco panel on the panel I have. (Obsolete, not recommended), Personal communication, J. Aronstein to D. Friedman, 3/6/2006, James P. Simmons: Personal communication and photographs used in this article series, J. Simmons to Daniel Friedman, 3/4/2006, 2/19/2008. "Home Wiring Inspection," Roswell W. Ard, Rodale's New Shelter, July/August, 1985 p. 35-40. Just below, the photo of a recent GTE Sylvania Zinsco circuit breaker burn-up is shown here courtesy of Jeff Weissman and observed, he reports, in a GTE-Sylvania electrical panel. The first Zinsco panels contained copper bus-bars and copper breaker clips. Book your home inspection today by calling 818-298-3405 In any case, I would replace this electrical panel. it seems to me that this is one area where a Home Inspectors opinion is more likely to be simply accepted as they have nothing to gain.I have never heard of Kearney I have personally experienced it over 20 times for overcurrent situations and about 5 times in fault current situations. Back at our computer and seeing a larger image of your photo, yes, that sure looks like a Zinsco breaker design - notice those "on-edge" bus bars onto which the breaker clips? circuit breakers, electrical panels, including In 1973, the GTE Corporation launched an electric panel design and called it "Challenger". LK-15 I happily agreed and thought it would be a great opportunity to test out my new GoPro 9 in the process. Production was halted when design flaws were discovered. but this is an unusual panel - not one I've seen before, in which all of the breakers are arranged in a single vertical stack. They may be the same design with a different sticker on top. Notice those two vertical strips that connect to two deep slots in the circuit breaker? Can anyone help me? Here I'll post a closer-view excerpted from your photo. They were installed in millions of homes and commercial properties in North America. You will not receive a notification when a response to your question has been posted. It turns out as I'm reading your article, you cite someone named James Simmons from Mr Electric. (Zinsco electrical panel photo below), 3. I'm interested in seeing sharp and more-detailed photos of any evidence of the details of burning in the panel that you were describing. white stickers telling you not to remove those "knockout" pair of opening covers. Third party vendors may produce "zinsco replacement" breakers but testing has shown they perform no more safely than the original ones. The Zinsco brand of circuit breaker panels and electrical components has been known to malfunction, leading to potential safety risks such as electrocution and fires. Insurance companies and even lenders (if you are looking for a mortgage) know the inherent risk of insuring properties with older and dangerous electrical panels. They can still overheat and fail to trip after a small overload. IDENTIFY GTE SYLVANIA-ZINSCO PANELS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. "Simplified Electrical Wiring," Sears, Roebuck and Co., 15705 (F5428) Rev. toggle switch colors and unique labels should be sufficient for most inspectors and owners to identify this equipment. On 2021-08-21 I was skeptical, figuring he was trying to upsell me. Completely by coincidence I happen to have gotten my hands on a Mr. Electric electrician today. circuit breakers are characteristic of Zinsco-design breakers. InspectAPedia tolerates no conflicts of interest. I'm dealing with this problem in my home currently, I have both my HVAC and an electrician here. https://unicornsystems.eu/ Look for an electrical inspector's stamp of approval of the installation - those, if present, are dated and signed. Why Do Zinsco Panels Malfunction? Can you assist with that? Photographs contributed to this website by Jim P. Simmons, Mr. Electric, Licensed Master Electrician, The Zinsco panels may work for years, but there is an underlying threat as homes have increased energy demands, these panels may overheat and breaker failure can occur. WA Home Inspector Advisory Licensing Board. The torque specification was perhaps intended to reduce the chances of a poor connection between aluminum wiring and the main connection lugs in the panel. I discovered it by coincidence doing a search on line during the eight hours they've been here so far. We are pleased to credit and link-to contributors. Even if you replace the circuit breakers, the risk from the panel itself will still be present. Challenger panels made by Challenger Electrical Equipment Corp or Eaton/Cutler Hammer. Connecticut Electric offers Zinsco breaker replacements. Sometimes that's true. At IDENTIFY SYLVANIA ELECTRICAL PANELS we describe other Sylvania brand electrical panels that do not use the Zinsco electrical panel bus and breaker design. Although sometimes brand names change at the border. Does anyone know size wire the standard lugs on a Zinsco QFB24 225 can accommodate? Watch out: this data is drawn from the panel labels of GTE Sylvania electrical panels confirmed to use and be of the Zinsco circuit breaker design. When these panels experience a short circuit or an overcurrent, they often fail to cut the power supply to the affected circuit. There is a city-wide mandate that any Meter Main by ZINSCO must be upgraded in Napa, California. There will usually be a label with the Zinsco logo on the panel. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. The inside box is a Zinsco/Sylvania model number 20-5x (7-14). 3. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Our Comment Box is provided by Countable Web Productions countable.ca, Click to Show or Hide Citations & References, GTE SYLVANIA ZINSCO PANEL MODELS & CIRCUIT BREAKER CODES, GTE SYLVANIA ZINSCO ARC FLASH FAILURE REPORT, CEB, COMMANDER, GTE, SYLVANIA PANEL BRAND RELATIONSHIPS, ARTICLE INDEX to ELECTRICAL INSPECTION & TESTING, HOME INSPECTION EDUCATION COURSES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES. Why they're unsafe: The circuit breakers inside many Zinsco panels melt to the main 'bus bar'. However, these dont seem any different from the original Zinsco panels. the circuit breaker colors and other external details permit the inspector to identify the problem Zinsco-design electrical panel bus and circuit breaker materials. Often you will see evidence of arcing or burning at this location. The Consumer Products Safety Commission (CSPC) has not issued a recall on many faulty brands due to budget issues and the significant investment required to implement such recalls, and their claim of a lack of supporting evidence. Original breakers were patented in 1950 and labeled "Magnatrip." Five additional patents would be issued for subsequent designs. Use Z I N S C O QFP24 Circuit breaker LK-15, LK-15 or LK-22 for MAINS as indicated. Electrical panel interior access should be by a licensed and trained electrician. Unfortunately, yes, that's a Zinsco-Sylvania panel design. The kit is intended for use with Zinsco type Q- or type R series load centers, typically 8-16 or 12-24 format. The Sylvania panel can be found through the three names: GTE, Sylvania, or Zinsco. Photo courtesy Tim Hemm cited at references at the end of these articles. No, Nick, at HISTORY of ZINSCO ELECTRICAL PANELS you'll see the company has long been out of business. This was because the threads on the bus bar were poorly manufactured and the electricians installing them would tighten it down, but not realize that the bolt was carrying the main current due to the gap. It would be prudent to replace it. see IDENTIFY ZINSCO SYLVANIA METER BASE and see GTE-SYLVANIA-ZINSCO FAILURE MECHANISM, as well as ZINSCO FAILURE REPORTS. Identify Zinsco-like Sylvania Electrical Panels and Circuit Breakers. Plated aluminum bus bars that get gouged-through when a breaker is inserted (mounting a breaker cuts through the plating and we see corrosion, overheats, failures). I'll check with him. @Robert shaner, No. panel or performs further disassembly (DANGER) can further identify the characteristic circuit breaker details but the circuit breaker A good place to start reading about proper generator hookup is The consensus among most electricians is that these breakers are safer than the original breakers. I am always very careful what I say as many people quickly jump to conclusions that I am upselling or Fear marketing. I'd be grateful if you'd post your photo and question there. It is a Zinsco type electrical panel and should be replaced. at BACKUP ELECTRICAL GENERATORS Rating with LK-15 150 Amps, LK22 225 AMP. Does the home you are buying have a Zinsco panel? It was also sold under the Kearney brand name. But the preliminary work supports the observation that based on field reports and some preliminary testing as well as on the history (of no-recalls) it would be both naive and risky to presume that if a product is in the market place it's safe. We have no relationship with advertisers, products, or services discussed at this website. Your Wenatchee and Chelan Professional Real Estate, Home and Structural Pest Inspection Service. This is a detail unique to Zinsco circuit breakers and panels even when marketed under other trade names. Questions & answers about the identification of Zinsco, Sylvania-Zinsco, and Kearney Electrical Panels - Zinsco-look alike Electrical Panels and Circuit Breakers. Moving the panel to meet electrical codes. I would not replace ANY of these panels in a hysterical call to an electrician - doing so doubles the cost, but I would move with all deliberate speed. I'm looking for information on a Zinsco single-phase 400A, 240VAC panelboard with a DS-4564 designation. Watch out: removing and replacing circuit breakers or "exercising" them by turning them on and off can in some cases actually increase the risk of a future failure because of scoring of a plated panel bus bar or because some breaker brands such as FPE show an increased failure to trip after being switched on and off. The replacements for zinsco do not make the 35 amp any more. I'd indeed like to see photos of the breaker panel you cite, in total, its labels, its bus bar design and its breaker details and labels. Don't be fooled by its lookalike counterparts; this panel is easily distinguishable with its pastel-colored breakers lined up in a single row. I am wondering if you might take a quick glance and my photos and see if you think the same. Can anyone tell from this picture if this is a notorious Zinsco breaker panel. The amps rating of the panel box is often on a label on the inside of the cover or on occasion on the sidewall inside of the electrical box - something your electrician can find if it's still there. (Don't try it.). 2, Type 1 Enclosure, 125A Max.. - Anonymous by private email, 2017/02/16. Zinsco Replacement Breakers Are Also Unsafe. Watch out: from the panel label and external appearance of the circuit breaker toggle switches, it looks as if as your panel is one of those that are unsafe and should be replaced. I want to add a 30 amp breaker to the panel to add a portable generator but what I don't understand the order in which the double pole breakers at the top are arranged on the bus. Instead the generator is connected to the panel THROUGH a transfer switch - an "either-or" type switch that makes certain that both power systems are not ever turned on simultaneously. single pole, yellow handle. Some other factors that will affect the price for replacing a Zinsco panel are: Depending on these and other factors, even newer wiring might need to be installed. Your electrician agrees that the circuit breakers are a latent hazard - risking failing to protect your home from a fire or injury should an over-current hazard occur, so he or she recommended replacement. The younger Zinsmeyer took over the company from his father in 1943 and renamed it Zinsco. The idea is good but why use a garbage design? We have no relationship with advertisers, products, or services discussed at this website. Guess I had bettertalk to our electrical contractor :(. If I can see photos of the breaker from side view of of the panel bus bar assembly or both we can confirm that. They have a reputation as the breaker which doesnt trip. - Anonymous (pending author wish to be identified) to A.C. to D.F. An electrical panel upgrade is the best option and can often be done in one or two days. ML12(12-24)C (Indoor) - Mod. Zinsco circuit breakers and the buss connections they use are easily identified regardless of the loss or absence of panel labels. He's doing a great job. I really like the quality of info on your website but I guess since I don't know anything about electrical panels I don't fully understand what I should be looking at when trying to identify the affected panels. 400 amps - $2,300 to $4,200. Thank you for your information. Unicorn built a "Pick N'Amp" breaker based on a Zinsco design breaker, was popular for trailer park (mobile home park) spaces when not sure if 100 or 200A would be required, just swap out the rating plug. Thank you so much for your help. It is not a law. What happened with Zinsco and why do electricians tell people to replace their panels? and I am watching carefully Challenger as well as the others you name. Some history of Unicorn Industries circuit breakers is at. Now required in the 2020 NEC, panel-level surge protection is key for critical circuits that power equipment in residential applications. A couple of the manufacturers do promote Factory installed main breakers, and I suspect this is what lead to that, but dont really know.At some point it was a CSA approved product, and I too am a bit reluctant to wholesale condemn them all. Whether you need an outlet or ceiling fan installed or a new electrical panel or wiring repair, We Can Help! ---- The following panels are considered out of date or have been involved in an electrical panel recall: Federal Pacific Electric (FPE) Stab-Lok panels. Cost to Replace a Zinsco-Sylvania Electrical Panel? What are your thoughts about this panel set-up? "Electrical System Inspection Basics," Richard C. Wolcott, ASHI 8th Annual Education Conference, Boston 1985. To identify a Zinsco panel, look for a vertical line of color-coded circuit breaker handles down the middle of the electrical box. MLB20(15-30)C Indoor 225A MAX. That identifies this as a Zinsco design. Is my panel safe . 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. I agree with that advice, but I acknowledge that the data base of tested Zinsco equipment confirming the failures is smaller than that of the FPE Stab-Lok hazard discussed elsewhere at InspectApedia. Replacing the panel can help improve the electrical systems overall performance and ensure it functions correctly. But it is by no means an exhaustive listing. Below is an enlargement of the the bus-connection section of a classic Zinsco circuit breaker - showing the difference between these devices. or Cat.No. Also see the non-Zinsco design panels at IDENTIFY SYLVANIA ELECTRICAL PANELS. Photo 2: A Zinsco panel bus, showing scratch and oxidation marks Photo 3: A Zinsco double pole breaker in-place, with the electrical panel bus exposed Photo 4: A Zinsco breaker side blowout, exposed breaker contact exposed in the electrical panel Photo 5: A Zinsco breaker side blowout-2, exposed breaker contact exposed in the electrical panel There is among electricians an endemic problem common to everyone working in contracting: an unfamiliarity with solid technical research sometimes leads folks to assert that nothing was wrong with product X except that it was the nature of the times in which it was made or installed. Here (above and below) we show external and internal identification labels for this 400-Amp Zinsco electrical panel. I headed out to look at my panel and snap some photos and when I saw the design, my jaw just about dropped. But other times not. Brief History of Zinsco Emile Zinsmeyer started Zinsmeyer Co right after the stock market crash of 1929. 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Electric panel AMPACITY for more detailed help in answering your question has been posted party vendors may produce Zinsco...