MYNFPA70 – The Installation Code

Article 409 covers industrial control panels that are intended for general use and that operate at 1000 volts or less. This Article addresses both AC and DC applications. A reference to understand what this Article addresses is UL 508A standard for Industrial Control Panels. Keep in mind that this Article does not include a requirement that all industrial control panels must be listed. Because of this lack of a listing requirement the definition for the term “industrial control panel” is very important to understand when determining what equipment is and is not covered by Article 409.  

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Part I General

409.1 Scope

409.3 Other Articles

Part II Installation

409.20 Conductor – Minimum Size and Ampacity

409.21 Overcurrent Protection

409.22 Short-Circuit Current Rating

409.30 Disconnecting Means

409.60 Bonding

409.70 Surge Protection

Part III Construction Specifications

409.100 Enclosures

409.102 Busbars

409.104 Wiring Space

409.106 Spacings

409.108 Service Equipment

409.110 Marking