Appendix A: Code Requirements

Because not every installation is governed by the same codes, it is important to know which codes (and which code years) are enforced by your local AHJ, as well as which state-level codes are enforced. The following table provides examples of code types, available code years for each type, an overview of what each code type covers, and the relevant sections for a Powerwall installation.


Code Type	Years	Covers	Important Sections	When is it important to know this code?
National Electric Code (NFPA 70)	2023 2020 2017 2014 2011	Electrical Safety	100 – Definitions 210 – Branch circuits 220 – Branch-circuit, feeder, and service load calculations 225 – Services 310 – Conductors for general wiring 690 – Solar Photovoltaic (PV) Systems 705 – Interconnected Electric Power Production Sources 706 – Energy Storage Systems	All regions
International Fire Code	2021 2018 2015 2012	Fire and Explosion Safety	Chapter 12 1205: Solar Photovoltaic Power Systems 1207: Electrical Energy Storage Systems	Areas that use IFC for fire code
International Residential Code	2021 2018 2015 2012	Building, plumbing, mechanical, fuel gas and electrical requirements for detached one- and two-family dwellings and townhouses up to three stories	Chapter 3 R324: Solar Energy Systems R328: Energy Storage Systems	All regions
International Building Code	2021 2018 2015 2012	Applies to all building except detached one- and two-family dwellings and townhouses up to three stories	N/A – a general understanding of what the IBC covers is important	As needed
NFPA 1	2021 2018	Fire code	Chapter 17: Wildland Urban Interface Chapter 52: Energy Storage Systems	Areas that use NFPA 1 for fire code
NFPA 855	2020	Energy Storage System Installation		Areas that use NFPA 855 for ESS installations

In addition to meeting all local and state code requirements, all installations must follow the product requirements provided in the applicable installation manual.