1926.405
Double-throw knife switches may be mounted so that the throw will be either vertical or horizontal. However, if the throw is vertical, a locking device shall be provided to ensure that the blades remain
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Requirements Installing Knife Switches
NEC Requirements for Switches | EC&M
The requirements of Art. 404 apply to all types of switches including snap (toggle) switches, dimmer switches, fan switches, knife switches, circuit breakers, occupancy sensors, and
Switches, based on the 2020 NEC
The requirements of Article 404 apply to all types of switches including snap (toggle) switches, dimmer switches, fan switches, knife switches, circuit breakers, occupancy sensors, and automatic switches
Cal. Code Regs. Tit. 8, § 2833.1
Double-throw knife switches shall be mounted so that the throw will be either vertical or horizontal. However, if the throw is vertical, a locking device shall be provided to ensure that the blades remain
California Code of Regulations, Title 8, Section 2484.24. Knife Switches.
Switchboards that have any exposed live parts shall be located in permanently dry locations and shall be accessible only to qualified persons. Note: Authority cited: Section 142.3, Labor Code. Reference:
Service Disconnect Rules per NEC Article 230, Part VI
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NEC Article 110.34: Electrical Room "Basics"
These requirements vary depending on whether the electrical equipment is rated at (1) 1,000 volts or less (See, Article #2) or (2) over 1,000 volts. This article reviews (2) when the electrical equipment is
Knife Switches, AHJs And More
The NEC requirements that the owner referenced are located in Section 404.13, Knife Switches. This requirement prohibits knife switches rated more than 1,200A at 250V or less and more than 1,000A
29 CFR 1926.405 -
Double-throw knife switches may be mounted so that the throw will be either vertical or horizontal. However, if the throw is vertical, a locking device shall be provided to ensure that the blades remain
Chapter E 380 SWITCHES
380.13 Knife switches. (1) Knife switches rated for more than 1200 amperes at 250 volts or less, and for more than 600 amperes at 251 to 600 volts, shall be used only as isolating switches and shall no