The five safety steps Īccording to the European standard EN 50110-1, the safety procedure before working on electric equipment comprises the following five steps: Using a "lockbox", the shift leader is always the last one to remove the lock and has to verify it is safe to start up equipment. The lockout can also be done by a "role" such as the shift leader. While this may be true for the United States, it is not mandatory in Europe. 147 (c) (5) (ii) (c) (1) the tag must have an identification showing the name of the person doing the lock and tag. Employer procedures and training for such removal must have been developed, documented and incorporated into the employer energy control program. A person's lock and tag must only be removed by the individual who installed the lock and tag unless removal is accomplished under the direction of the employer. No two keys or locks should ever be the same. In the United States a lock selected by color, shape or size, such as a red padlock, is used to designate a standard safety device, locking and securing hazardous energy. The lockout hasp is secured with two padlocks. This prevents unintended movement of the hoist. The locked-out machinery cannot be activated until all workers have removed their padlocks from the clamp.Ī lockout device applied to a hoist brake. Each worker applies their own padlock to the clamp. To expand the number of available holes, the lockout device is secured with a folding scissors clamp that has many pairs of padlock holes capable of keeping it closed. When two or more people are working on the same or different parts of a larger overall system, there must be multiple holes to lock the device. The circuit breakers remain in the off position while electrical work is done. It keeps the panel door locked and prevents the panel cover from being removed. To protect one or more circuit breakers in an electrical panel, a lockout–tagout device called the Panel Lockout can be used. 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 that it has been tampered with.
Ī common feature of these devices is their bright color, usually red, to increase visibility and allow workers to readily see if a device is isolated.
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.
For example, most circuit breakers have a provision to have a small padlock attached to prevent their activation. Safety equipment manufacturers provide a range of isolation devices specifically designed to fit various switches, valves and effectors. It would not be unusual to have to visit several areas of the factory in order to effectively isolate a device for service (the device itself for power, upstream material feeders, downstream feeders and control room). For example, a food processing plant may have input and output tanks and high-temperature cleaning systems connected, but not in the same room or area of the factory. In industrial processes it can be difficult to establish where the appropriate danger sources might be. These safety disconnects usually have multiple places for locks so more than one person can work on equipment safely. The safety disconnect ensures the equipment can be isolated and there is less chance of someone turning the power back on if they can see the work going on.
Loto hasp code#
The National Electric Code states that a safety/service disconnect must be installed within sight of serviceable equipment. 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). The locking and tagging of the isolation point lets others know not to de-isolate the device.
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