NFIRS 5.0 Element: ‘Cause of Ignition’

Définition : The general causal factor that resulted in a heat source igniting a combustible material. The cause could be the result of a deliberate act, mechanical failure, or act of nature.
Purpose : This information is used to determine if further information about the factors related to the fire’s ignition will be collected later in the module. When combined with other data elements that make up the fire’s “ignition chain,” it provides critical information about the nature of the events and the circumstances that caused the fire. This is an important element in understanding the causes of fires.
Entry : Check or mark the box best describing why the heat source and the combustible material were able to combine to initiate the fire. If this is an exposure report, check or mark the top box in this block and skip to Section G.

Element Specification

 Specification   Value 
Requirement Mandatory
Expected Length 1
Element Type Coded Field – The coded field relating to an entry in the code table. Most coded fields allow for Plus+ One codes. For these fields the expected length of the coded entry is depicted as (National length OR Plus+ One length). Only fields with this notation in the expected length column allow for Plus+ One definitions. If the user has not provided information, an empty field should be transmitted.


Here are the NFIRS codes for the ‘Cause of Ignition’ element

Building Status  Code 
Under Construction 1
In Normal Use 2
Idle, Not Routinely Used 3
Under Major Renovation 4
Vacant And Secured 5
Vacant And Unsecured 6
Being Demolished 7
Other 0
Undetermined U

Relational Edit Rules for ‘Cause of Ignition’

NFIRS defines relational edit rules to ensure data consistency and accuracy in its database. These are the rules for ‘Cause of Ignition’.

Rule Group  Overview
Relational Edit Rule 51 Cause of Ignition ‘Other’ for Exposures.
Relational Edit Rule 52 Factors Required for Unintentional Cause.
Relational Edit Rule 53 relational edit rule 53.

Transactions containing ‘Cause of Ignition’

The value of this element is captured by the following transaction :

Need more NFIRS help?

Here are some other useful ressources to learn more about NFIRS.

NFIRS Codes Cheat SheetNFIRS CodingNFIRS ExamplesFDIDsPOCsNFIRS TransactionsNFIRS ModulesNFIRS ElementsNFIRS RulesNFIRS ReferenceNFIRS Compliant ?

You can also read this NFIRS 5.0 Complete Reference Guide, and NFIRS 5.0 Design Documentation in order to have a deeper understanding of NFIRS 5.0. Here are also NFIRS 5.0 Forms ready for you to download and use.

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Last Updated on April 28, 2023