Fire and Smoke Alarms

some people are ignorit and think that pulling the fire alarm is a joke (it is not a joke fire men and police are always at the scene of a fire alarm even if it is falsely pulled,police and fire men take it very serious)

the bottom line is that when smoke gets into the detector, it's electrical current is interrupted, causing the alarm to sound (which im guessing you already knew) I'm not totally sure why the radioactive element (americium-241) has to be in there, but what I DO know (contrary to what the previous poster put) is that the alpha rays produced by the radioactive element are NOT strong enough to escape, and therfore pose NO harm whatsoever to people around it.

An overview on home burglar alarms work can be found by reading the article "How Burglar Alarms Work" by Tom Harris. The article can be found on the HowStuffWorks website.

yes because of it having a signals, if it mix with power cable, fire alarm circuit get distributed.

In class A wiring, 2 wires start from alarm control panel terminal, run through fire sensors / detectors and the same 2 wires run back into the alarm control panel and get connected as 2 more wires thus there would be 4 wires at the panel totally. This would help the control panel monitor all the sensors / detectors even if a loop wire breaks in the middle.

In Class B wiring, the control panel is just connected to 2 wires. These 2 wires run through fire sensors / detectors and terminate at end of line resistor. Thus if any wire breaks in between the sensors that are connected to control panel end of wire would only be monitored. The broken wire side of sensors won't be monitored

Oh, dude, a class E fire alarm system? That's like the unicorn of fire alarms. It doesn't actually exist! You might be thinking of Class A, B, C, D, or K fire alarm systems, but definitely not Class E. So, unless you're in a parallel universe where Class E fire alarms are a thing, I'd say it's time to double-check that question.

Smoke alarms can go off for several reasons unrelated to smoke, such as dust buildup, low batteries, or high humidity. Sometimes, they may be triggered by cooking fumes or steam from a shower. It's important to check the alarm's battery, clean it gently with a vacuum, and ensure it's installed in an appropriate location away from kitchens or bathrooms. If the problem persists, consider replacing the unit or consulting a professional for further assistance.

The most likely reason your smoke alarm starts beeping when you are on the treadmill is it needs a new battery. It is a coincidence that you are on the treadmill when it is alerting you.

I am a great person to answer this question because I own my own fire alarm system (I put it together myself). The reason some fire alarms (depending how sophisticated and advanced the alarm system is) squirt ink is due to the fact that, say for example, some decides to pull the fire alarm at a school, it will leave a dye on your fingers you that you can't see, but the authorities can. They may arrest you for calling in a false alarm, and wasting the fire department's time.

It really does not "squirt" the ink. As it simply just sits on the handle of the fire alarm.

Basically how it works is they put a little vegetable based dye on the pull station handle and when the person who pulled it pulls it they will get the dye on their hands. The trick is when they attempt to wash it off of their hands , it only spreads and gets worse! This way police or whoever can easily identify the culprit because of their unusually blue colored hands. And it stays on for 48 hours!

do you need a C10 license to test fire alarm systems in public schools.

Smoke alarms typically use photo-electric sensors or alpha-particle emitters, although the photo-electric sensors are much better for detecting smoldering fires.

Chances are your smoke detector is faulty and needs to be replaced . They are very sensitive and break very easy. But most likely your detector got damaged when you changed the batterys.

There are many possible types of sensors and circuits for fire alarms.

If you mean alarm SENSOR circuit, there are often two types to a smoke sensor: a power circuit and a sensor trip circuit. The power circuit supplies power to the sensor for its internal electronics and the sensor trip circuit is a separate pair of wires to the dry contacts that open or close to signal an unusual smoke or heat condition.

Various supervisory means are used to determine whether the sensor is properly connected and operating (i.e., no open circuit or short circuit), such as an "end-of-line" (EOL) resistor, or a modulated, query-response or polling signal.

At the alarm-panel end, each circuit would have its own connection for a zoned system: one pair for the power and the other pair for the trip circuit.

Other types of circuits include heat detectors, manual pull stations, sprinkler flow switches, supervisory tamper switches, and other types of inputs. Output circuits could include lights, sirens, bells, door-closing signals, HVAC control signals (on or off), elevator return commands, remote signalling to monitoring centers, etc.

Many residential fire alarm circuits now include one or more wires to connect the otherwise independent smoke alarms so that any one of them will trigger all the others, for better sound penetration of the alarm annunciation.

I do not think it is.

Umm let me think. NO!

A bad or clogged stack relay i have found bad oil will cause the stack relay

to clogged

It depends on the position of the oven, oven door, kitchen door and shape of house.

He is feeling HIS side of the door to detect if the heat from a fire has been CONDUCTED through the door from the OTHER side. The heat on the other side could have come from the fire by way of radiation, convection or conduction.

Selenium

Heat changes the resistance of a circuit. The change is detected by the system, and activates the alarm.

Door alarms are available at most home improvement stores such as Home Dept, Ace Hardware, and Lowes. Stores specializing in home security will also offer door alarms for purchase as well as offer installation services.

No, generally, smoke alarms lose sensitivity as they get older. Some fire codes require smoke alarms in one- and two-family dwellings to be replaced every ten years. Commercial smoke alarms must be tested and replaced when they can no longer be calibrated within the manufacturers' specifications.