Change Summary

• A new section 110.25 titled Lockable Disconnecting Means and exception have been added to Part I of Article 110. The new section consolidates the provisions for lockable disconnecting means into one location
• Previous NEC requirements that dealt with lockable disconnecting means will not reference 110.25 for consistency and uniform application of the requirements

Expert Analysis

Section 110.25 resulted from work of the Usability Task Group assigned by the NEC Correlating Committee. Requirements for disconnecting means to be lockable in the open position existed in numerous sections in previous NEC editions. This new section consolidates identical requirements for disconnecting means required to be “capable of being locked in the open position” in a single section for clarity. This new section is intended to facilitate a lockout tag-out scenario consistently. It is equally important to ensure that the means for placing the lock remain in place with installed equipment. The concepts included in the proposal provided correlation throughout the NEC with respect to the capability of placing a lock on a disconnecting means to secure it in the open position. To effectively correlate these requirements Code-wide, the Task Group developed companion proposals that removed all existing lockable disconnecting means provisions and replace them with a reference to 110.25. Action by Code Making Panel-1 on Comment 1-76 results in an exception that relaxes the requirements for cord-and-plug connection locking means where the provisions for adding a lock would not have to remain with the cord cap or attachment plug when the lock is not installed.

Safety Disconnect Switches

Leviton offers a full line of Enclosed Safety Disconnect Switches for every application, including the PowerSwitch Enclosed Safety Disconnect Switch Product Line: DS and EDSR Series 

• The DS Series of 30 Amp to 100 Amp, fused and non-fused enclosed switches

• The EDSR Series which brings a 30 Amp, non-fused safety disconnect switch and NEMA locking receptacle into the same enclosure for easier installation and maintenance

Heavy Duty Enclosed Safety Disconnect Switches cut power to the circuit for equipment servicing and are designed to withstand higher short circuit currents than manual motor controllers. Watertight and dust-tight, PowerSwitch Safety Disconnect Switches are the ideal choice for process environments with particulate laden air, outdoor exposure, or requiring water washdowns.