Fire alarm cable

What does the number on the pull box tell me?

In a listing marked 22/4, the first number identifies 22 AWG and the second identifies four conductors. Compare that to an item marked 16/2. Both may have red jackets. They describe different conductor sets, and the project documents determine which line belongs on the order.

How do I handle a substitution?

Provide the exact proposed part number and its listing to the licensed fire-alarm contractor for approval. Have purchasing record the accepted alternate and required quantities. Use the installer’s approved circuit and pathway requirements when comparing FPLR and FPLP reels.

What if two line items look identical at receiving?

Assign the reel ID to its approved schedule line as soon as it arrives. Compare the printed listing, conductor set and shielding against that line. Keep partial reels identified when they return to storage so a later crew does not have to guess the cable type from an unmarked cutoff.

Receiving spools for a multi-phase building project

When a delivery contains alarm materials for several floors, match each reel label to its approved purchasing line before it goes into shared storage. For 10F5-02712NF, the order can call out its 500-foot package alongside the 18/2 solid conductor description and FPLR marking. A different gauge or listing hidden behind the same red jacket needs the project reviewer’s attention. Retain the reel identifiers with the floor assignment. If one floor needs additional cable, the installer can reference the approved items already on that floor and explain whether the remaining length will cover the proposed run.

Reconciling two abbreviated reel descriptions

A distributor’s quote might abbreviate the first line to “red 18/2” and another supplier might include FPLR and a shield designation. Before comparing price per foot, request the complete manufacturer line for both products. Copy the contractor’s approved project reference next to each one and have any missing attributes resolved in writing. If one line is offered as a larger spool, confirm that its length actually suits the continuous sections needed. A smaller number of boxes may change storage and dispatch without changing the design. If the proposed substitutions come in after the project has started, keep the original and revised approvals together. When maintenance later asks what was installed in a particular area, the accepted model and reel records can answer without relying on the color alone.

Compare parts for your setup

Technical references

• UL guide to wire and cable markings