FAQ

114
continued from page 112
Material taken from the National Electric Code
®
is reprinted with permission
from NFPA 70
®
, 2023 edition. National Electrical Code
®
, Copyright 2022,
National Fire Protection Association, Quincy, MA. All rights reserved.
NEC
®
Text
724.45 Class 1 Circuit Overcurrent Device Location.
724.46 Class 1 Circuit Wiring Methods.
724.48 Conductors of Different Circuits in the Same
Cable, Cable Tray, Enclosure, or Raceway.
724.49 Class 1 Circuit Conductors.
724.52 Circuits Extending Beyond One Building.
Article 726 Class 4 Fault-Managed Power Systems.
Part I. General.
726.1 Scope.
726.3 Other Articles.
726.10 Hazardous (Classied) Locations.
726.12 Uses Not Permitted.
726.24 Mechanical Execution of Work.
Part II. Class 4 Circuits.
726.121 Power Sources for Class 4 Circuits.
726.122 Class 4 Loads.
726.124 Class 4 Marking.
726.130 Terminals and Connectors.
726.136 Separation from Electric Light, Power, Class 1,
Non–Power-Limited Fire Alarm Circuit, and Medium-
Power Network-Powered Broadband Communications
Cables.
726.139 Installation of Conductors of Different Circuits
in the Same Cable, Enclosure, Cable Tray, Raceway, or
Cable Routing Assembly.
726.144 Ampacity
Part III. Listing Requirements.
726.170 Listing of Equipment for Class 4 Systems.
Expert Analysis
New articles have been added to address:
• Cables for power-limited circuits, fault-managed circuit,
Optical Fiber.
• Class 1 power-limited circuits and Class 1 power-limited
remote-control and signaling circuits.
• Class 4 fault-managed power systems.
Leviton Solution
When addressing emerging technologies and advanced
low-voltage circuitry, Leviton Network Solutions must
be considered.
Leviton oers best-in-class copper and fiber cables that
are tested to perform beyond industry standards.
From Cat 6A cable for high-speed 10GbE networks to
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