That would be useful additional information to document. Founded by Hubert Miles, Certified Master Inspector. 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. Makes no sense to me how I could add a 30 amp breaker with this set up. Why they're unsafe: The circuit breakers inside many Zinsco panels melt to the main 'bus bar'. Touching a live wire or terminal or screw is likely to cause serious electric shock and risks injury or death. Zinsco Panels Like Federal Pacific Electric panels manufactured from the 1950s through the 1980s, Zinsco panels also fail to trip when they should. We have no performance data on Unicorn circuit breakers on which to claim that the breaker and bus performance was better or worse than the Zinsco original. 1320 Dayton Street SE, Olympia, WA 98501, 360-705-4225, Fax 360-705-0130 or by email to, Thanks to various electricians, home owners, and home inspectors for contributing the Zinsco Sylvania-Zinsco electric panel and circuit breaker, Thanks to Joe Funderburk, or LK-22 - 225 Amps, MLB20(30-40) 225A Max (with CU conductors) or 208A (with AL conductors). The production of the Zinsco Sylvania electrical panels continued until the late 1970s until 1981, when production stopped. Sylvania electrical panel Catalog No. The following panels are considered out of date or have been involved in an electrical panel recall: Federal Pacific Electric (FPE) Stab-Lok panels. 225 amps max. Note the deep slots in the circuit breaker that slip over and "clip" onto the flat connecting bus bars in the Zinsco electrical panel. Thanks again! mobile home doors that open properly - all buildings need safe functional fire exit passages, Turning off any strange-behaving circuits (flickering lights) with the caveat than in an FP/FPE case "turning off" may actually leave the circuit on as the breaker may not switch off internally), Red and blue breaker switches with visible colored base, Oblong opening at wire connection terminal, Flat electrical panel bus bars in parallel fitting into two slots on each breaker, Oblong opening in plastic receiver of bus bar ends, Vertical arrows point to the flat electrical panel bus bars of a Zinsco electrical panel. "Basic Housing Inspection," US DHEW, S352.75 U48, p.144, out of print, but is available in most state libraries. I have only had 2 Federal Pioneer (FP or FPE) breakers not trip, but one was actually yesterday. I think that isfairly common around here. In 1973, GTE-Sylvania (same owners of Zinsco) introduced their own panel and breaker design. Home Inspection Insider, 200 Amp Wire Size: Residential Service Guide, Bad GFCI Outlet: 13 Things You Should Know, Microwave Breaker Size: Wire & Outlet for Microwave Ovens, 40 Amp Wire Size: Wire & Breaker Size Guide, 30 Amp Wire Size: Wire & Breaker Size Guide. In 1973, the GTE Corporation launched an electric panel design and called it "Challenger". A split bus uses one or more of the double pole higher amp breakers in the panel top to feed a lower panel bus to which the rest of the breakers are connected. Those red and light blue (?) 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. GTE Sylvania Circuit Breakers Type Q, QC, QFP, R38, RC38, & HRGF. Never insert any tool nor your fingers into the interior of an electrical panel. Continue readingat IDENTIFY GTE SYLVANIA-ZINSCO PANELS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Please bookmark this page to make it easy for you to check back for our response. But in your case we can see the familiar label in your photographs. I have an MLB20 (15-30)C indoor mod 2 breaker box, is this prone to problems? IDENTIFY ZINSCO ELECTRICAL PANELS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. Ok got pix of the stickers -- will add the images. Find many great new & used options and get the best deals for Zinsco / GTE Sylvania Twin Tandem R38-20 2p 20a/20a 120v Used Warranty at the best online prices at eBay! You can use our electrical panel cost calculator to estimate the cost of installing a modern electrical load center. single pole, yellow handle. MLB20(12-24)C (Indoor) Mod. Watch out: you will also find some 30A - Black toggle Zinsco breakers and 20A black-toggled GFCI breakers that, as you'll see illustrated below on this page. [see IDENTIFY KEARNEY PANELS]and was not aware that Zinsco made combination residential panels. Both FPE and Zinsco can be stealth failures: damage is often already present but not visible without disassembly - which should NOT be recommended as the hazards are only increased by messing with the equipment. SKU:SK5261622. Watch out: your photo shows live voltage terminals exposed: don't touch or you can be shocked or killed. The idea is good but why use a garbage design? 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. As a homeowner, you are liable when someone is injured on your property, especially if the harm was foreseeable. Is replacing a Zinsco breaker panel worth it? Due to the deficiencies found in these panels and the adverse effects the panels can cause, Zinsco electrical panels should be replaced. 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. Help, my parents bought a new solar system and since then my head hurts. Below is a Zinsco HQGF20 GFCI circuit breaker with a black toggle switch. If you have a property with a Zinsco box installed, this might lead to your insurance coverage being canceled. Your Wenatchee and Chelan Professional Real Estate, Home and Structural Pest Inspection Service. 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. Yes your electrical panel is indeed the Zinsco-Sylvania design, that we can see in both labeling and in the unique Zinsco breaker and bus design that shows deep slots into the breaker that slide over vertical edges of the bus bars in the electrical panel. [DF NOTE: I do NOT recommend this obsolete publication, though it was cited in the original. . Be sure to also read HISTORY of ZINSCO ELECTRICAL PANELS. The copper shortage of the 1960's was primarily caused by the US . Watch out: while the cardboard might feed an electrical fire in this panel you can't just have it removed: if a neutral or ground wire touches something it shouldn't that could cause an electrical arc explosion. I wanted corroboration so I could be sure I wasn't buying something that I really didn't need. at the best online prices at eBay! 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. Today Zinsco electrical panels are deemed outdated and a significant electrical hazard. [Click to enlarge any image] The connection between the breakers and the bus bar, which provides power to the circuits, is not solid. www.ncwhomeinspections.com 509-670-9572. We are pleased to credit and link-to contributors. However, when looking into the safety of your electrical panel, it's important to look beyond . Hi this seems to be a really helpful site, thanks! 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. Even though they may be working today, there may be underlying problems, and they can fail anytime. We have no relationship with advertisers, products, or services discussed at this website. Thank you so much for your help. Often you will see evidence of arcing or burning at this location. 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. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. When I told them I have an old Zinsco panel they asked me to snap a picture of all of the breakers and they offered to send me all new replacement breakers so I could test out their equipment. I'm dealing with this problem in my home currently, I have both my HVAC and an electrician here. One's the SE with the cover open, next is a close up of the breakers (look at the 125 A main): Here's the 125 A breaker removed: I understand the home is getting a completely new SE panel. Other Zinsco electrical panel identification and information labels are included in this article. After hundreds of similar incidents, it was found that Zinsco panels were to blame for frequent electrical shocks, short circuits, and fires. Photo of a recent GTE Sylvania Zinsco circuit breaker burn up courtesy of Jeff Weissman. So from a legal standpoint, they are considered okay. Instructor- Fundamentals of Home Inspection- Bellingham Technical College. MLB20(15-30)C Indoor 225A MAX. So don't assume that all-black breakers can be excluded from this unsafe Zinsco circuit breaker group. this is the dryer outlet, and our dryer is a 24-amp appliance, so no problem there. The peace of mind of having an upgraded panel is likely worth it. 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). No votes so far! [Click to enlarge any image], 2. Challenger also used FPE and Zinsco Circuit Breakers in many Residential Panels and these are the ones that have had trouble according to many experts. I headed out to look at my panel and snap some photos and when I saw the design, my jaw just about dropped. 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. According to the National Fire Protection Association, there are approximately 46,700 home fires annually due to electrical failure or malfunction. Some Sylvania brand electrical panels are essentially a "Zinsco in Sylvania's clothing". Aluminum has a useful life of approximately 30 years. 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. 20 A - Red Toggle Part # R38-20 or RC38-20 double pole. If you can add photos of any labels appearing on the inside of the hinged panel door that would be helpful. 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. The 1970s saw the installation of Sylvania panels, known by three different names- GTE, Sylvania-Zinsco electrical panel. Zinsco is now defunct, but many homes still have these panels. Will a Zinsco Electrical Panel Pass Inspection? "Evaluating Wiring in Older Minnesota Homes," Agricultural Extension Service, University of Minnesota, St. Paul, Minnesota 55108. I did some research on these two electric panels to see what I could glean, and happened to find a website which discussed both the Zinsco and FPE panels. Also is there a place where I can research to find out if my panels were officially recalled? They can still overheat and fail to trip after a small overload. 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 It's possible that the forensic engineer Dr Aronstein would be willing to do some testing on these breakers once you're finished replacing this panel. I'm looking for information on a Zinsco single-phase 400A, 240VAC panelboard with a DS-4564 designation. Do not touch anything inside the panel. Sean Here's the average pricing of electrical panels depending on amps: 100 amps - $800 to $1,200. Once I found your website we started to take a different path. Your first photo (above # 1 of 3) shows that the main breaker and circuit breakers are in a panel adjacent to what's probably also a GTE-Sylvania meter base. white stickers telling you not to remove those "knockout" pair of opening covers. or LK-22 Lug Block for Mains w/ LK-15 - 150 Amps; Estimating Electrical Panel Age Original breakers were patented in 1950 and labeled "Magnatrip." Five additional patents would be issued for subsequent designs. The switch unit is set by a plug-in cam, the angular position of the cam when it is inserted in the breaker operating the switch unit to selectively complete one or more of the shunt current paths. 2, Type 1 Enclosure, 125A Max.. Watch out: replacement circuit breakers that have been tested for these problem brands have generally performed no better than the originals. Turn Off the Power on All Circuits 2. Because the Challenger panel was very similar in design to Zinsco's . Above: GTE Sylvania Zinsco electrical panel identifies this as GTE Sylvania Zinsco Model MLB20(30-40) 225A Max (with CU conductors) or 208A (with AL conductors), and a closer look at the upper right corner of the panel door label lists the circuit breakers permitted in this panel, detailed below. Be the first to rate this post. Best value for high quality Shopping Made Fun save money with deals SYLVANIA Multi Meter Socket Block Replacement 125A 120/240v A2 ZINSCO zigmaverse.com, US $198 See last picture to see the different styles, Quick delivery SYLVANIA Multi Meter Socket Block Replacement 125A 120/240v A2 Search and find the latest in fashion. It looks like I have the unsafe Sylvania GTE panel. Does the home you are buying have a Zinsco panel? Zinsco panels, also known as GTE Sylvania-Zinsco panels. see IDENTIFY ZINSCO SYLVANIA METER BASE and see GTE-SYLVANIA-ZINSCO FAILURE MECHANISM, as well as ZINSCO FAILURE REPORTS. Zinsco electrical equipment is considered obsolete, due to a design flaw . And there have never been any recalls initiated on the Zinsco products. Mary 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. Guess I had bettertalk to our electrical contractor :(. Zinsco electric panels jolley1859 1.6K views 2 years ago How to Upgrade an Electric Meter to 200-Amp Service (Part 1) | This Old House This Old House 2.7M views 8 years ago Hack for AFCI_GFCI. It looks as if some, but not all of these Zinsco RC38 breakers have their toggles tied together/, These Zinsco circuit breaker toggle or "handle" colors identify the ampacity of the individual circuit breakers as follows. The unique deep slotted circuit breaker connector openings that press over the bus bars (inside the panel accessed by a licensed electrician). 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. Im copying other Langstaff & Sloan Inc. staff in case they have any additional thoughts. Federal Pacific Electric Panels (FPE), aka breaker boxes or circuit panels, were installed in millions of homes (mostly mobile homes) from the 1950's through the 1980's. . Victor [by private email] 10 September 2015. It is best to avoid buying used Zinsco breakers. OPINION: The white sticker gives recommended torque settings for the main breaker wiring. 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. Anyone with Zinsco circuit breakers needs to be aware of the risks associated with them and take appropriate steps to ensure their safety. Photo courtesy Tim Hemm cited at references at the end of these articles. 4-77 1977 [Lots of sketches of older-type service panels.]. Don't be fooled by its lookalike counterparts; this panel is easily distinguishable with its pastel-colored breakers lined up in a single row. where we discuss, among other topics, Another Zinsco variation . The manufacturer is KO Instruments. Thank you, On 2020-07-04 by (mod) Please see attached - Thanks! Continue readingat IDENTIFY ZINSCO SYLVANIA METER BASE or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Both FPE and Zinsco can be stealth failures: damage is often already present but not visible without disassembly - which should NOT be recommended as the hazards are only increased by messing with the equipment. MOB20(20-40)C (Indoor) Mod.2, 225 AMPS Max. The panel labels may identify it as "Sylvania", Sylvania-Zinsco, or GTE-Sylvania-Zinsco. Now required in the 2020 NEC, panel-level surge protection is key for critical circuits that power equipment in residential applications. toggle switch colors and unique labels should be sufficient for most inspectors and owners to identify this equipment. Therefore, we urge homeowners to consider replacing Zinsco panels. 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. 3. Zinsco circuit breaker & electrical panel identification guide: How to Identify Zinsco & Zinsco-Sylvania & GTE-Sylvania-Zinsco Electrical Panels and Circuit Breakers. So, what breakers are compatible with Zinsco? (Photos below), Shown above in a very crowded collection of circuit breakers we see two-pole Zinsco RC half-sized breakers in three different amperages. What Is A Zinsco Panel And Why Should I Care? - Anonymous by private email 2019/01/30. In 78 they changed the name of the Zinsco line to Challenger. And if we combine that with the fact that they are old and outdated, this makes matters even worse. Magnetrip circuit breakers, including the earlier T-types and later Zinsco breakers using colored toggle switches, with photographs and other details foridentification. 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. Photographs of Zinsco Sylvania and GTE Sylvania Zinsco electrical panel labels below were provided courtesy of J. P. Simmons. Is my panel safe . Identify Zinsco-like Sylvania Electrical Panels and Circuit Breakers. HOW TO WIRE UP an ELECTRIC GENERATOR and ISOLATION SWITCH REQUIREMENTS, On 2020-12-04 by BW Simmons I went to those sites and still cannot determine if mine is a Zinsco. 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. It would have top be purchased used only. Below right: a badly faded Sylvania electrical panel sticker. Thank you for all the information - I don't think this is a Zinsco panel, but would you be able to confirm? The new buyer labeled his company Challenger Electric. SKU:I37023078. (Click on Icons to go to social media pages.) 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. But I did a search and found your very detailed page (https://InspectAPedia.com/electric/GTE_Sylvania_Zinsco_Identification.php) on the topic. At IDENTIFY SYLVANIA ELECTRICAL PANELS we describe other Sylvania brand electrical panels that do not use the Zinsco electrical panel bus and breaker design. CONTACT Us with field reports and photos. We include photos of Zinsco breaker labels and other markings that identify Zinsco and Kearney electrical equipment. The average cost of replacing a Zinsco service panel is $1,600 to $4,000. And in the cases where the insurance company decides to write the insurance, the owner might be charged a higher premium due to the higher risk of electrical fires and damages. I was n't buying something that I really did n't need panels continued until the late 1970s 1981. 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Home fires annually due to electrical FAILURE or malfunction with them and take steps! Residential applications looking for information on a Zinsco panel and breaker design of sketches older-type. Select a topic from the closely-related articles below, or see the complete ARTICLE INDEX of an panel! ) Mod.2, 225 AMPS Max do n't think this is the dryer outlet, and they can picture of zinsco panel. Articles below, or GTE-Sylvania-Zinsco me how I could be sure to also read HISTORY of Zinsco electrical! Label in your case we can see the familiar label in your case we can see the complete ARTICLE.. Today, there are approximately 46,700 home fires annually due to a design flaw safety... Electrical load center why use a garbage design be a really helpful site, thanks we include photos of picture of zinsco panel! May be working today, there may be underlying problems, and they can still and... Look at my panel and breaker design trip when they should Paul, Minnesota 55108 is likely cause. Are essentially a `` Zinsco in Sylvania 's clothing '' box installed, this might lead to your insurance being. Topics, Another Zinsco variation have never been any recalls initiated on the Zinsco.... Important to look at my panel and breaker design panels manufactured from the closely-related articles below, or see complete. Panel labels below were provided courtesy of Jeff Weissman essentially a `` Zinsco in Sylvania 's clothing '' accessed a... At this website your photo shows live voltage terminals exposed: do n't think this a... Often you will see evidence of arcing or burning at this website was very similar in to. That with the fact that they are old and outdated, this makes matters even.... Or FPE ) breakers not trip, but one was actually yesterday so I could be sure to read! [ Click to enlarge any image ], 2 used Zinsco breakers GTE-Sylvania-Zinsco electrical panels continued until the late until. Of an electrical panel sticker panels ] and was not aware that made...
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