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Ask the Technician

Douglas Krantz -- Fire Alarm Engineering Technician, Electronic Designer, Electronic Technician, Writer





G Wrote:

We failed the inspection with city due to lack of signage at pull stations in an existing apartment building. The signs are supposed to say "LOCAL ALARM ONLY - IN CASE OF FIRE CALL 911". Now we have to upgrade the whole system.

I checked NFPA 1, 72, and 101 and could not find anything referring to this.

Originally the permit that was pulled cited covered replacement of fire alarm panel damaged by lightning; it showed that new panel was to be the same panel that had been there.

There's no recourse on this, but I would like to find the code entry that states that the signage is "part of the system".

How is it that the local government can make, what used to be a simple service call, such a big ordeal?

Further, the existing appliances include Wheelock, Edwards, System Sensor, and some old mechanical horn/strobes that can only be accessed by climbing up to and walking on the shed roof. Some of these can only sound off with continuous cadence. Since a permit was pulled, can the fire department make the owner bring the whole fire alarm system up to code?

Douglas Krantz Wrote:

To quote my boss, you are the solution, not the problem.

The signage referred to here is an attempt by the city to make the system a little safer. The signage tells the occupants of the building, when fleeing for their lives, to take one more step to call the fire department because the fire alarm system doesn't do it itself. See The Sign Said to Call 911 to get my opinion as to how good the signs are.

The NFPA Code and how it relates to the city, the owner, and the fire alarm system installer/servicer needs to be understood. In all of this, keep in mind that the owner owns the fire alarm system, and not you. If the city is requiring upgrades to the system, the city is requiring owners to upgrade. Your job is to help the owner keep up with city requirements.

NFPA Code is not code, it is not law, it is not an absolute. It is a bunch of words written on some paper published in a book giving suggestions on what to do to make buildings safe. Most city, county, state, and federal agencies take these suggestions and say this is going to be law.

In addition, the governing bodies often add to the "Code", subtract from the "Code", or change the "Code". This explains how the city can require signs be installed by the owner. Remember, it's the local government that's the law, not the NFPA.

Sometimes the city governments will decide that everyone should be brought up to the current "Code". A way of triggering the required upgrades is that when the fire alarm panel is replaced, even with an exact same model, the whole system needs to be upgraded.

Remember, as far as the fire alarm system goes, complying with city law is the owners responsibility. Helping the owner comply is something you can do. The problem is the city, the solution is you.






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Electrical Flow


On this website, most references to electrical flow are to the movement of electrons.

Here, electron movement is generally used because it is the electrons that are actually moving. To explain the effects of magnetic forces, the movement of electrons is best.

Conventional current flow, positive charges that appear to be moving in the circuit, will be specified when it is used. The positive electrical forces are not actually moving -- as the electrons are coming and going on an atom, the electrical forces are just loosing or gaining strength. The forces appear to be moving from one atom to the next, but the percieved movement is actually just a result of electron movement. This perceived movement is traveling at a consistent speed, usually around two-thirds the speed of light. To explain the effects of electrostatic forces, the movement of positive charges (conventional current) is best.

See the explanation on which way electricity flows at www.douglaskrantz.com/
ElecElectricalFlow.html
.