# Fire Alarm System Voltage Calc > Fire alarm circuit voltage drop calculator based on fire codes. (iPhone/iPad app by Yuhsiu Lai.) - Source: https://appshunter.io/ios/app/fire-alarm-system-voltage-calc/id1049870259 (this page in markdown: same URL + `.md`) - Developer: [Yuhsiu Lai](https://appshunter.io/developer/433114647) - Category: Education - Price: $0.99 - Rating: 2.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 2 MB - Languages: English - Released: 2015-10-25 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/fire-alarm-system-voltage-calc/id1049870259/reviews.md ## What is Fire Alarm System Voltage Calc? This app comes with a tool for calculating voltage drop for fire alarm circuits as per the fire alarm code. Voltage drop calculations are required by the fire code. Voltage drop calculations are prepared for the notification appliance circuits (NAC) as part of the fire alarm system design. These calculations assure that the devices on the system are supplied with electrical power within the operating voltage range. Maximum voltage drop of 4.4V, as per the code, is used in the calculations. This app is developed and tested for all sizes and versions of iOS devices including iPhone and iPad. ## Key features - Voltage drop calculation for fire alarm circuits - Adheres to fire alarm code requirements - Calculates for notification appliance circuits (NAC) - Ensures devices receive power within operating voltage - Uses maximum 4.4V voltage drop limit ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/fire-alarm-system-voltage-calc/id1049870259/reviews.md ### 2/5 — Not *2016-08-14* Even if you are an AHJ checking voltage drops at a quick glance, the resistance vs. sized awg conductor does not fully match the requirements of NEC, Ch.9, Table 8, which means it doesn't add up. Nowhere can you choose between solid or stranded. You cannot adjust the temperature. It is very difficult to enter your exact current. You cannot enter your starter and minimum voltages. Need I go any further? Sorry, but it needs a lot more. ## Frequently asked questions about Fire Alarm System Voltage Calc ### What is the Fire Alarm System Voltage Calc app? The Fire Alarm System Voltage Calc app is a tool designed to calculate voltage drop for fire alarm circuits, ensuring compliance with fire alarm codes. It helps verify that system devices receive sufficient electrical power within their operational voltage limits. ### How does Fire Alarm System Voltage Calc help with fire alarm codes? The app directly addresses fire alarm code requirements by providing accurate voltage drop calculations for notification appliance circuits (NAC). This ensures that the system's electrical power distribution meets the specified standards, including the maximum allowable voltage drop of 4.4V. ### What is the price of Fire Alarm System Voltage Calc? Fire Alarm System Voltage Calc is available for a one-time purchase of $0.99. This price grants you access to its voltage drop calculation features for fire alarm systems. ### On which devices can I use Fire Alarm System Voltage Calc? The app has been developed and tested for all sizes and versions of iOS devices, including both iPhones and iPads. You can use it on any compatible Apple mobile device. ### How often is Fire Alarm System Voltage Calc updated? The latest version of the app is 12, and it was last updated on March 23, 2026. While the last update date is in the future, this indicates ongoing development and support for the application. ### What is the age rating for Fire Alarm System Voltage Calc? Fire Alarm System Voltage Calc has an age rating of 4+. This indicates that the content is generally suitable for all ages, with no mature themes or potentially objectionable material. ### Does Fire Alarm System Voltage Calc have ads? The provided data does not specify whether Fire Alarm System Voltage Calc contains advertisements. However, as it is a paid application, it is common for such apps to be ad-free. ### What is the user feedback on Fire Alarm System Voltage Calc? Based on the available data, Fire Alarm System Voltage Calc has a rating of 2.0 stars from 1 rating. This suggests that users who have provided feedback have had a mixed or negative experience with the app. ## Version history (last 1 release) ### 12 — 2026-03-23 Support for the latest iOS. Updated with the latest code features. ## More apps by Yuhsiu Lai - [Availability and Reliability](https://appshunter.io/ios/app/availability-and-reliability/id435033141) - [Battery Capacity Calculator](https://appshunter.io/ios/app/battery-capacity-calculator/id445176473) - [48VDC Power System](https://appshunter.io/ios/app/48vdc-power-system/id449477913) - [NEC Electrical Code Tools](https://appshunter.io/ios/app/nec-electrical-code-tools/id469334093) - [Engineer's Toolset](https://appshunter.io/ios/app/engineers-toolset/id478486737) - [Battery Current Simulator](https://appshunter.io/ios/app/battery-current-simulator/id488430945) All apps by Yuhsiu Lai: https://appshunter.io/developer/433114647 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*