Concern:
Working with electricity can be dangerous: it can harm a person (e.g., electrocution when touching a live circuit) or ignite a fire. A worker can turn off the breaker before starting any work, but then someone else might turn it back on. The fact that anyone passing by has access to the electrical breaker panel increases the risk of electrocution.
Countermeasure:
OSHA 1926.417 requires lockout-tagout (LOTO) of circuits while any employee may be exposed to contact with parts of fixed electric equipment or circuits (US Department of Labor, n.d.).
A lock is placed on the door of the entire breaker panel to prevent anyone other than the worker doing the work from accessing the panel and accidently switching on breakers that should not be switched on. By locking the door, access to the breakers is prevented, and the safety of the workers is enhanced.
Limitation:
| Triz Description | 9.1: If it will be necessary to do an action with both harmful and useful effects, this action should be replaced with anti-actions to control harmful effects. |
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| Image sources | (Electrical Panel Lockout (2017) OSHA Compliant Lockout Tagout Devices. http://www.panellockout.com/ visited by Bardaweel on 1 NOV 2017) |
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