// CODE SNIPPET
403.9.1 Class 1 Air
Related Code Sections
403.9.1 Ventilation Air, Class 1 Air
Recirculation or transfer of Class 1 air to other spaces shall be permitted. [ASHRAE 62.1:184.108.40.206] ...
2018 Uniform Mechanical Code of Nevada > 4 Ventilation Air > 403.0 Ventilation Rates > 403.9 Air Classification and Recirculation > 403.9.1 Class 1 Air
(C) Special Conditions, Ducts, Plenums, and Other Air-Handling Spaces
Class 1, Class 2, and Class 3 circuits installed in ducts, plenums, or other space used for environmental air shall comply with 300.22. Exception ...
National Electrical Code 2017 of Nevada > 7 Special Conditions > 725 Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits > 725.3 Other Articles > (C) Ducts, Plenums, and Other Air-Handling Spaces
203.0 Definitions, — A —
Air, Class 1. Air with low contaminant concentration, low sensory-irritation intensity, and inoffensive odor. [ASHRAE 62.1:5.16.1] Air, Class 2 ...
M1601.1.1 Duct Systems, Above-Ground Duct Systems
temperature to a maximum of 250°F (121°C). Factory-made air ducts shall be constructed of Class 0 or Class 1 materials as designated in Table M1601.1.1 ...
Residential Code 2012 of Nevada > 16 Duct Systems > M1601 Duct Construction > M1601.1 Duct Design > M1601.1.1 Above-Ground Duct Systems
(B) Special Equipment, Ducts, Plenums, and Other Air-Handling Spaces
apply to circuits and equipment installed in other spaces used for environmental air (plenums). Exception No. 1: Class 2 and Class 3 cables installed ...
National Electrical Code 2017 of Nevada > 6 Special Equipment > 640 Audio Signal Processing, Amplification, and Reproduction Equipment > 640.3 Locations and Other Articles > (B) Ducts, Plenums, and Other Air-Handling Spaces