The recent events in Saskatchewan, Canada (and now elsewhere) have refocused attention on one of the many risks associated with “smart” utility meters, i.e., the increased risk of fires.
by K.T. Weaver, for Take Back Your Power
How much risk is finally too much – when the results of failure can be catastrophic?

The Saskatchewan Smart Meter Fiasco

TBYP Fire 2The recent events in Saskatchewan, Canada have refocused attention on one of the many risks associated with “smart” utility meters, i.e., the increased risk of fires.

As previously reported on July 30, the Saskatchewan government has ordered SaskPower to remove all 105,000 smart meters that have been installed across the province following several fires linked to the devices.

On Friday, August 1, the news coverage continued in Saskatchewan regarding the smart meter fires.  An article in the Leader-Post made reference to a “Smart Meter Fiasco” and gave credit to the provincial government for:

“insisting that eight meters out of 105,000 catching fire (a 99.992-per-cent success rate, according to SaskPower) was simply unacceptableSetting aside the moral issue of endangering human lives, the liability costs of house fires could be massive.  It would have been far more cynical to have just kept installing smart meters in the hope that nothing would happen.

At the same time, however, mention was made of tough questions being asked by the opposition political party, such as:

“Why did the government not use qualified electrical workers for these installations and will the government cancel its exemption and ensure that only qualified electrical workers are involved in uninstalling these dangerous meters?

“What are the details of the government’s purchase agreement with Sensus Inc., the American supplier of these meters?”

“Why does it need to take six to nine months to uninstall these dangerous meters?”

… and in a separate article:

“[W]hy didn’t [the government] act sooner when problems with the smart meter program came to light.  SaskPower representatives have said the Crown corporation continued pursuing a partnership with Sensus even after it found out about incidents in the United States where its meters had been tied to malfunctions and recalls.”

Smart Meter Fires Outside Saskatchewan

Smart meter fires have occurred around the world, but some of the most recently reported problems have occurred with meters manufactured by Sensus:

  • Portland General Electric in Oregon is recalling 70,000 residential Sensus smart meters that run the risk of catching fire.  PGE’s internal analysis and tests — confirmed by independent experts hired by the company — show this meter type did not perform optimally and in an extremely rare case, a meter could catch fire.  Three small meter fires involving this type of meter have been reported in PGE’s service territory, with minor property damage in one case.
  • TBYP Fire 3PECO Energy in Philadelphia, PA also replaced all its Sensus smart meters in 2012 after several of them overheated and caught fire, two of them resulting in serious house fires, according to the Philadelphia Inquirer.  PECO hired Underwriters Laboratories (UL) and two independent consultants to examine the meters.  Their reports convinced the utility to swap out all the meters manufactured by Sensus Metering Systems Inc. of Raleigh, N.C., with those made by a Swiss vendor, Landis & Gyr AG.

Here is an appropriate video for viewing regarding the PECO fires in 2012.


However, in the case of PECO, just changing out the meter to another vendor did not solve the overall problem.  [Note that in an interview in 2012 with Greentech Media, PECO’s Communications Manager said only that the Landis+Gyr meters “performed better in the field,” based on an independent investigation but would not elaborate on what that meant.]

In February 2014, a Landis smart meter caught fire and apparently exploded in Bensalem, Pennsylvania.  The subsequent fire resulted in significant damage to an apartment building.  This fire represents one of the most well-documented instances of a smart meter fire on record in terms of the damage, havoc, injury, and potential loss of life that can be caused by smart meters.

TBYP Fire 4In the figure shown to the right, an officer as part of an investigation is shining a flashlight toward the two upper smart meters located on the right side of the outdoor shed.  The upper most smart meter looks completely deformed (despite the somewhat poor resolution of this photo).  There appears to be melted plastic drooping down from what would be the normal meter location.  There is also blackened area at the top, where smoke, sparks, and fire previously billowed outward and upward.

Dramatic camera footage exists taken soon after the fire started in Bensalem, during the fire fighting activities, and during the recovery efforts, making you feel as if you are “on-the-scene” as it happens.  If you have any doubts on the potential damage and injury that can be caused by a smart meter, watch the following three (3) videos.

In the first video where you see the dramatic flames about 25 to 30 seconds into the video, they are emanating from an outdoor shed containing smart meters.


Based upon all reports to date, the smart meter itself was the cause of the Bensalem apartment building fire, not arcing and not the wires.  [Note:  An original source of reporting for the smart meter fire included the following link:  “Electric Meter Blamed for Bensalem Apartment Fire.”  As a part of the report, it was indicated that Battalion Fire Chief Robert Sponheimer attributed the apartment building fire to a “meter malfunction.”]

Landis Meter Fire in PA 2013A review of records indicates another PECO installed Landis smart meter caught fire on February 27, 2013, shortly after installation.  At a public meeting on March 18, 2013, Assistant Chief Eamon Brazunas, Berwyn Fire Company, recounted a “significant incident” where one fire call was “caused by sparking and arcing around the Smart-Meter installed by PECO.  He encouraged homeowners to have an electrician inspect the interior once a Smart-Meter is installed on the exterior.” …  Is everyone having this inspection performed to help avoid a catastrophic outcome due to smart meter installations?  And why should anyone have to pay for this inspection?

From an overseas perspective, an Australian news station aired an excellent review on smart meter fires in 2012; refer to the video shown below.

Concerns Over Smart Meter Fires Hit Ontario

TORONTO – As reported on Thursday August 7, nearly half of Ontario’s 77 electricity distributors have installed so-called “smart” meters manufactured by a U.S. company whose equipment has been linked to nine fires in Saskatchewan, according to Ontario’s electricity regulator.

[Smart] meters have been linked to 23 incidents reported to Ontario’s Fire Marshal from 2011 to 2013.

“I can tell you 10 of those were smart meter failures attributed to internal faults, and 13 were small fires attributed to high-resistance heating,” said spokeswoman Carol Gravelle.

A New Democrat MPP [Member of Provincial Parliament] says the Liberal government is playing with people’s lives by not acting sooner on potentially hazardous smart meters that may have caused several Saskatchewan fires.

I think it is imperative that the minister act quickly to find out whether or not we have these meters and have them removed immediately before somebody does gets hurt or before somebody’s home burns down,” NDP MPP Lisa Gretzky told reporters Thursday referring to Energy Minister Bob Chiarelli.

What Causes the Smart Meter Fires?

On August 1, Sensus issued a press release indicating that “Results of Smart Meter Investigation Point to External Factors.”  This press release attempts to deflect responsibility away from the company (as part of a product defense strategy).  Regarding recent “incidents,” the press release mentions that:

“one [incident] was caused by an issue with a meter base attached to a home, three were caused by utility over voltage, two were caused by water intrusion through the meter base and one remains under investigation.”

What do the explanations in the above mentioned press release really mean, a press release by the way, that never actually mentions the word fire”?

Assuming we don’t reject the entire press release as nothing more than propaganda, let’s look at the “over voltage” issue.  Is this a condition exacerbated by the fact a smart meter contains an electronic circuit board that would not have been an issue with an analog meter?  On the so-called “water intrusion” issue, shouldn’t utility usage meters installed outdoors and subject to rain, sleet, snow, and condensation be designed to withstand at least some “water intrusion”?  How much water intrusion was involved?  Obviously water and electricity don’t mix, but was it just condensation that may have affected the electronics of a smart meter but not affected an analog meter?  Have “water intrusion issues” been reported for analog meters?

With regard to the “meter base attached to a home issue,” are solid state meters in general more susceptible to overheating due to loose meter base jaws (and less durable construction)?

These are the types of probing questions that need to be asked and answered by independent and unbiased experts for these fire incidents and others reported world-wide.  Why did Sensus issue a press release pointing to “external factors” with one meter still under investigation?  Is this the one meter that Sensus can’t rationalize an “external factor” as the cause?

When smart meter fires have occurred in the past, utilities have many times blamed the “customer’s wiring” (or meter boxes, etc.) for the problem.  However, after a review of news reports and technical blogs addressing smart meter-related fires, the most credible conclusions for the source of fires are as follows:

  1. TBYP Fire 5Insufficient care is taken by smart meter installers.  Socket receptacles may be corroded when the switch from the analog meter is made to the smart meter.  Rather than doing a quick swap, much more care needs to be taken with an associated inspection and cleaning of the meter socket by qualified personnel.  For these types of situations, a fire might occur just because the meter is changed out in an improper manner (no matter what type of meter is involved with the swap), but the smart meter might still introduce inherent vulnerabilities due to the nature of its construction.  Also, just for the record, “the National Electrical Manufacturers Association (NEMA) “strongly recommends that all existing meter sockets be thoroughly inspected when electrical meters are installed.  Inspection criteria should include (but not be limited to) indications of excessive heating, corrosion, loose connections or components, deformed socket jaws, broken components, failed insulation, damage due to ground settling or vandalism, or any exposed live parts.”
  2. Some manufacturers are just making “cheap” smart meters or have poor quality controls such that a fire becomes more likely.  In these cases, the risk for a fire may be more dependent on the manufacturer of the meters themselves.
  3. TBYP Fire 6There is a material composition difference in the construction of the smart meters such that they may operate at higher temperatures or have a lower flash point.  Plus, you have the more obvious difference that the smart meter contains at least one electronic circuit board and an analog meter does not.  In addition to the so-called “hot socket” phenomenon, where the blades of the socket receptacle are not making good electrical contact with the smart meter stab connectors due to spreading, corrosion, or other insulating effect, this condition may be aggravated if the smart meter stab connector dimensions or material composition are different than the connectors for the old analog meter.  Furthermore, it has been hypothesized with some anecdotal evidence that RF emissions from a smart meter may be sufficient to induce corrosion or degradation of the materials inside the smart meter resulting in eventual failure or short circuiting of the meter electronics.

TBYP Fire 7The first two problem areas discussed above are correctable through better installations and better quality controls.  But the last area dealing with different construction materials, RF emissions, and use of electronic circuit boards is more problematic and indicative of an inherent design problem.  One can also make the somewhat subjective observation that the analog meter typically has an industrial look to it, but a smart meter looks to be more of a “consumer electronics” quality.  Refer to the figures for views of both types of meters during a “teardown.”  Most of the smart meter devices appear to be made of plastic with inclusion of a cheap looking circuit board.  Is this circuit board suitable for use in harsh environments?  Again, we need unbiased and independent evaluations for what seem to be common sense observations.

TBYP Fire 8

Since traditional analog meters contain no electronics, they are not subject to damage from utility line surges.  All electronics require some degree of surge protection.  The electronics inside smart meters typically employ metal-oxide varistors (MOVs) for overvoltage surge protection.  The problem arises from the lack of the heavy heat sinking capacity of the MOVs.  This is needed in order to avoid failure due to overheating when they are energized.  The physical construction of the smart meters does not allow for the heat generated by the energized MOVs to escape into the environment as there are few metal parts to act as a heat sink.  Under the right conditions of over-voltage and line impedance, it may be possible to cause the MOV to burst into flames.  The Fire Marshal’s report from Toronto, Canada regarding local Canadian utility smart meters noted overheating and fires associated with MOVs. [Reference: Comments before the Maryland Public Service Commission, September 28, 2012]

In another safety-related issue, it is known by utility companies that wireless RF emissions from smart meters can interfere with the function of ground fault circuit interrupters (GFCI) and arc fault circuit interrupters (AFCI).  From a safety perspective these devices operate on selected circuits or outlets in the home to sense unbalanced currents to detect shock hazards or to detect changing patterns of current that may indicate an arc condition.  Possibly without the knowledge of the homeowner, the function of these critical safety devices may be undermined by the installation of smart meters.

It is evident that utilities are struggling to deal with the fire issues.  As reported in a 2013 Illinois Commerce Commission (ICC) report, some utilities are attempting to mitigate smart meter fire risks by “proactive temperature monitoring.”  However, as stated in the ICC report:

“The majority of ComEd’s AMI meters are equipped with temperature sensors and can report their internal temperature on command … [a]though the temperature sensor was not designed for that function. … However, a problem with the scans soon made itself known. …  Apparently, radiofrequencies can enter the meter and cause the temperature sensor to report significantly inaccurate measurements.”

Also, the previously mentioned document submitted to the Maryland Public Service Commission in the form of comments contains the following language:

[T]he meter burned up despite the sensing device.  Although no fire occurred, the safety system failed miserably. …  [They] could actually hear the meter sizzling as if something was being fried inside it. …  What this clearly demonstrates is that the remote sensing system the utilities are relying on is hardly foolproof.  One can only imagine what would have happened if there had been a real fire.”

Underwriters Laboratories (UL) Certifications for Smart Meters Are Optional

TBYP Not UL ListedAnother fact worth mentioning is that smart meters are generally not certified by Underwriters Laboratories (UL).  This demonstrates that smart meters have been deployed without proper consideration for the safety of the homeowner.  Underwriters Laboratories has a program for listing of utility meters, but it is voluntary in nature for meter manufacturers since there is no regulation that requires UL certification.  Alternatively, a utility company could require UL certification for any purchased smart meters as part of a project specification.

[Commentary:  Imagine that, all the mandates on the consumer, but there is no mandate for the utility to install a UL certified meter on your home.]

In 2013, Underwriters Laboratories published a standard entitled, “UL 2735, Standard for Safety for Electric Utility Meters.”  In a document prepared by UL describing the new standard, words are used that are quite telling in terms of revealing the inherent risks and problems associated with smart meters as compared with traditional meters:

The introduction of smart meters raises new concerns about functional safety, performance and product safety, data security, and interoperability, which are not fully addressed by the [current] standards. …

“This [new] standard was developed to address problems that have been reported from field installations of smart meters, including fires, meters ejecting from meter socket bases and exposed live parts.  When electronic components are overstressed, there is a potential for the components to explode.  Among other things, UL 2735 addresses the potential flammability of plastic enclosure materials under fault conditions. …  For meters utilizing batteries, the batteries are evaluated to determine that they will not cause an explosion or produce a risk of fire as a result of either excessive charge or discharge, or if a battery is installed with incorrect polarity.”

So if we are lucky, the new UL standard may help mitigate fire and explosion problems related to smart meters.  However, there are currently no requirements forcing utilities to use UL certified smart meters in the future or to go back and test/replace currently deployed smart meters to this new standard even if it does somehow lessen the risks.   The above quoted UL document  lends considerable credence to the assertion  that  there are increased fire and safety-related risks associated with  smart meters  as compared to traditional analog meters.

No More Inspections by Meter Readers

A review conducted by the Illinois Commerce Commission (ICC) found a number of problems associated with the Commonwealth Edison smart meter program that could contribute to fire-related situations.  One of the concerns identified in the ICC report is as follows:

“When and where Illinois utilities have completed their smart meter installation programs, they will have no further need for meter readers.  With the loss of meter readers, monthly utility visits to meters and meter bases will also end.  Meter readers have always provided at least a visual, if superficial, monthly inspection of the exterior of meters and meter bases.  Meter readers are not meter experts or meter technicians, but they may identify unsafe conditions visible from the outside of the meter base, such as obvious signs of an accident and any overheating serious enough to cause discoloring of the outside of the equipment. …  The future absence of meter readers … reduce[s] the number of opportunities for utility employees to observe signs of and evaluate the potential for future meter base overheating.”

The concern expressed by the ICC is consistent with that of the National Electrical Manufacturers Association (NEMA) where it stated that:

“As utilities move to two-way communications for meters and remote meter reading, the opportunity for periodic and repetitive visual inspection of meter sockets is expected to decline radically.  The interval between site visits by utility personnel could be as much as 100 times as long as the current monthly opportunity for inspection.”

Concerns Over Transparency and Willingness to Acknowledge Problems

Although the Saskatchewan government is to be commended for finally taking action to protect the public, there are many instances where other government agencies, utilities, and the smart grid industry throughout the world are reluctant to acknowledge increased fire-related risks associated with smart meters.

Another issue is whether fire investigations by local fire departments actually determine the true cause of “electrical fires” that are initially reported as such in the media and where no final word is ever disclosed as to whether the fire may have been caused by a smart meter.   In many cases, a fire investigation is basically done to rule out arson, and the average investigator is not trained or qualified to determine conclusive origin and cause of electrical fires.


From the available evidence, albeit some of it is anecdotal in nature, smart meters for a number of reasons increase the risk of fire to homeowners as compared to analog utility meters.  It is also important to emphasize that the concerns do not just relate to one model of smart meter being worse than another.  All smart meters would appear to have inherent increased fire and safety-related risks as compared to traditional analog meters.  Some smart grid advocates may claim that “small” increases in fire risk are acceptable because they still believe in the mythical benefits to one day be delivered through the smart meter.  The problem is that for any risk analysis that results in potentially catastrophic consequences for one alternative versus another, any increased risk is generally considered unacceptable.  Case in point, … Saskatchewan, Canada.  …  Do you still want a smart meter on your home?  I didn’t think so.

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About the Author
K. T. Weaver is a health physicist who was employed in the nuclear division of a leading electric utility for over 25 years.  He served in various positions, including Station Health Physicist, Senior Health Physicist, corporate Health Physics Supervisor, and corporate Senior Technical Expert for Radiobiological Effects.  K.T. Weaver has earned a B.S. in Engineering Physics and an M.S. in Nuclear Engineering with a specialty in radiation protection.

  • I think with out having an ul approved sticker puts all meters in a possibility of failing I,m an electrician and know if the customer puts themselves in a bad position I’ve always have been told that insurance companies will not cover fires started by a device with out an ul sticker.People should call their home owners coverage to find out if their policy is void do to not being ul approved

  • It’s just a little bit wierd that the article is primarily about property damage and/or insurance risk. People die in fires. Hello?

    • Thanks Paul. You are correct: several people have died in “smart” meter fires — and this needs to be the mainstream cover story. The whole article is about liability from harm (including death)… the details and causes are being drilled down into in this article.

      • d: Welcome to my blog! I’m ineserettd in what other expat Americans have to say, so I’ll certainly be visiting your blog.Tim: Thanks! I’ll be posting the next episode by Thursday our time.

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