Thursday, June 21, 2012
Teaching Kids about Electrical Safety at Home
Sunday, October 24, 2010
Fire Investigation and Junk Science
Wednesday, June 9, 2010
Don't Forget That Little Green Wire

it really does nothing and doesn't need
hooked up, right?
WRONG!
A fire alarm system is sounding its trouble signal in a commercial building and the maintenance man has summoned me to check it. He pulls out his ring of keys, inserts them into the lock, then quite suddenly he's unable to move--he is frozen in place.
What exactly has happened here do you suppose?
Well, it's my guess that he's received an electrical shock. Luckily, this time he manages to pull away, but a few seconds more and he could have been toast. So what happened?
It appears the people who installed the fire alarm panel did not do their job properly as they forgot or simply failed to install a small green bonding jumper from the removable panel lid to the back box. This allowed electrical current to flow through the lid when the hot 120 volt wire supplying power to the panel pulled loose, coming in contact with the lid.
Now, had this jumper been bonded from lid to back box, and if the panel had been grounded properly, this event would not have taken place. The breaker would have tripped out and just the trouble signal would have sounded. The problem would have been spotted as soon as the lid was opened. Instead, because the jumper was not used, the maintenance man got a severe jolt.
Grounding and bonding of electrical equipment is critical to assuring that it operates properly. It also assures that any type of overload is cleared. It also assures that if a wire or component disintegrates and touches the metal enclosure in the system, nothing bad will happen to someone working on it.
Now, here's the kicker, not all lids need to be grounded. This is especially true if it is permanently attached to the panel box by means of a full-length piano-type hinge. In this case, code considers the lid properly bonded due to the continual path of metal touching. This is not something you have with a removable lid where only 2 small areas of the lid touch the panel box.
You say "bonding and grounding, what's the difference?"
Bonding is used to eliminate a possible hazard, like with the removable lid. The back box has a ground wire which runs the entire way back to the main service entrance for power. I know it's confusing, but follow the manufacture's guide lines and you'll do just fine. But if you fail to follow them, sooner or later something will fail and there will either be a fire or someone will get shocked.
With electricity it's just like a chain... the weakest link is where the problem will develop.
Friday, March 26, 2010
Counterfeit Dangers
| The Fire just waiting to start in your home Counterfeit and Knock off Electrical Items By Nick Markowitz Jr. Fire Investigator You find yourself on a nice sunny spring day deciding to go for a walk what better way to enjoy it than a stop at a local Flea Market. All the great smells from food vendor's carts and the busy activity everywhere make this a special time. Unfortunately you do not realize that the choices you make this day may well result in the destruction of your home and possibly your family. You see a vendor selling all kinds of new, cheap dollar stuff from many different boxes he has laying on plastic sheeting on the ground. You find he has some plug strips you have been needing for your computer system and kitchen, very cheaply priced at $3.00 each. Anywhere else they would cost you $12.99. And so you buy a couple of them, totally unaware that what you think is a good deal on a legitimate item is actually a dangerously-built counterfeit or look alike, also known as a Knock Off. You go home, plug one of these power strips in your computer system and start working with your new laser printer. You get everything set up and ready to go. It's getting late and it's nearing your bedtime. You leave your computer and printer on because it also works as a fax machine. You go to bed to later awaken to the sound of your smoke detector. Your house is filling up with smoke and you instinctively get everyone up and out, just in time as flames come out of the family room where the computer is located. Luckily tonight everyone is safe and firefighters arrive in time to stop the fire in the family room, but there's water and smoke damage everywhere. The Fire Marshal arrives after the fire is out and he begins his investigation. He traces the fire's origin to just about where the plug strip was, but it's almost totally destroyed. Luckily, you have the duplicate strip from the kitchen to give him. On closer examination, he finds that it's not what it appears, it's counterfeit, a knockoff, made to look like a good product. Instead, it is made very cheaply. For example, instead of a #14 gauge wire cord, it's only #16. This means that it can only carry half of the 15-Amps that the packaging says it can carry. To make matters worse, the on/off switch is also inferior because it's undersized. The unit also has no UL, FM, or any other testing agency's approval and no manufacturer's name is on it, other than "made in China." This plug strip never should have been imported and sold in this country because it is absolutely illegal under Federal Import rules. Yet everyday illegal and dangerous items made cheaply and dangerously make it into this country. They are being sold at flea markets; dollar stores; and 2nd-hand, variety-type stores. This is a serious problem. Just a survey of local flea markets here in the Pittsburgh area revealed 10 out of 12 vendors had illegal items for sale. All of them having been imported illegally through an importer in New York City. But when it comes to electrical items, it not just the small stuff being made, its large frame breakers and switch gear as well. Cutler Hammer, a division of Eaton Corp., has started a campaign to make electricians aware of knockoffs. Can you imagine that the apartment or office building you may be in has illegal, copycat electrical switch gear items in it? But it happens. It even happens in the airline and automotive industries and it has caused numerous accidents and deaths. In a word, it is a growing problem. Sometimes manufacturers will also illegally copy the UL testing label just to make an item look legit, but it's not. The Consumer Products Safety Commission, also known as CPSC, is in charge of protecting consumers from dangerous products and they have field agents in every state. But with the rapid proliferation of illegal items coming into this country, agents are often overwhelmed and in need input from average citizens when it comes to reporting dangerous items. When these agents come across them, which is almost weekly, the CPSC issues bulletins about all kinds of dangerous items being recalled--from children toys with lead paint issues to exploding candles, to lawnmowers with blades that break. A recent effort by the CPSC is a down-loadable booklet which is being issued to every 2nd-hand and variety-type store in order to help them identify dangerous products that they may otherwise sell to an unsuspecting public. This helps in the removal and destruction of of illegal goods that should not be on the U.S. market. Merchants and vendors who continue to sell these dangerous items face fines well in excess of $10,000.00. In additional these illegal items can be seized and destroyed. The only way to stop this scourge going across America is for consumers to become educated so they can avoid these problems in the first place. As a general rule, if it sounds too good to be true, it usually is. For more information on how to identify and report a dangerous product, go to www.cpsc.gov. |
Temporary Wiring Dangers
By Nick Markowitz Jr.
Fire Investigator
After requesting PD response, the worker all of a sudden found his wallet and identified himself as working for an electrical contractor. The FM canceled the Police response right away. Just another interesting day in the life of a Fire Marshal, or so it seemed.
Needless to say the FM got on site, saw the way the wire was run and had them remove it immediately. So then the next day they ran the wire from the roof along with the low voltage wires over top a temporary pole which was not fastened properly as the low and high voltage wires were tied to each other, which is not right.
The FM asked the electrician about it. They told him that this is the way they always do it. So needless to say he called me and a couple other electrical experts on what should be done to make things safe. Each of us visited the site and gave our suggestions. An electrical inspector is due the morning of the sale to make sure things are right. If not, the sale will be canceled or they will run it with no power.
This brings up the issue, these are registered, insured electricians doing work they knew was improper. They did it any way they wanted without regard to safety and code simply because they were not in the City of Pittsburgh. They figured they could get away with it because it's out in the suburbs.
So once again we prove even though laws, licensing and registration, and everything else under the sun is in place, a contractor can, and often does ignore the law, except this time around the EC did not get away with it. In reaponse, this particular EC does nothing more than squeal like a stuck pig saying he is losing all kinds of money.
My response to his response is this: "You would not be losing money if you were properly designing and installing your jobs correctly, according to the principle of doing it right the first time."
Because this contractor thought he had a bunch of suckers on the line, he tried to pull the wool over everyone's eyes. He slopped the wiring and has been caught in the act. Needless to say, any time in the future his company's name comes up in this community, they'll be taking extra time to look at his work because he has proven that he cannot be trusted.
Now, I'm sure the other excuse he will try to use to the FM is "everyone else is doing it this way so he could not put the system in properly because the store in question would not pay the price for a properly installed job."
In this case, I would have declined to do the work, even to give a bid. I would have then called the code-enforcement office to advise them to keep an eye on things, which is what appears to have happened. The store manager did everything right and followed what she was told to do. In the final analysis, it's the electrician's fault for what happened, not the store's fault.