For other devices such as ball or gate valves, plastic pieces which either fit against the pipe and prevent movement, or clamshell-style objects which completely surround the valve and prevent its manipulation are used.
Yellow locks also are common and are used with yellow tags to signify that the equipment must be kept in a zero-energy state, but it is not actively being worked.
This error was caused when the administrative procedure on-site was not followed and one lock and tag was permitted protecting multiple contractors.
A red lock and tag are used to communicate that the equipment is actively being worked.Appendix: A, B, C, D, E, F,." United States Department of Labor: Occupational Safety and Health Administration.This change can partially be explained by the increased focus on worker safety over the past 20 years and the increasingly dangerous power available in todays modern electrical systems.Typically, these two processes work together well, but an administrative error caused the workers to believe they were protected from all energy sources when they were not protected properly on the high-voltage equipment.
For example, most circuit breakers have a provision to have a small padlock attached to prevent their activation.
The Canadian Standards Association 's standard CSA Z460, based on industry, labour and government consultations, outlines the specific activities of a lockout program and is usually considered the appropriate standard of good practice for lock out.
No two keys or locks should ever be the same.
Each color signified a different communication purposewith red being used for active loto and other colors like blue and black used to communicate why the equipment was shutdown and which department installed the lock.
The past bias was to work on energized equipment to prevent outages.This document ensures loto continuity between many workers and that all steps of the loto process are completed.A properly implemented eewp program requires that repairs on electrical components be performed de-energized unless de-energization can be deemed casino emeraude lons le saunier infeasible.Citation needed Group lockout edit When two or more people are working on the same or different parts comment gagner ma vie of a larger overall system, there must be multiple holes to lock the device.Also, the devices are usually of such a design and construction to prevent it being removed with any moderate force - for example, an isolation device does not have to resist a chainsaw, but if an operator forcibly removes it, it will be immediately visible.Industry safety standards in the United States edit Lockout-tagout in the US, has five required components to be fully compliant with osha law.To emphasize the last step above in addition to the others, the entire process can be referred to as lock, tag, and try (that is, trying to turn on the isolated equipment to confirm it has been de-energized and cannot operate).9 An employee performs hot-tap operations on pressurized pipelines that distribute gas, steam, water, or petroleum products, for which the employer shows the following: Continuity of service is essential; Shutdown of the system is impractical; and The employee follows documented procedures and uses special equipment.Citation needed The National Electric Code states that a safety/service disconnect must be installed within sight of serviceable equipment.