Which device is used to secure electrical equipment against tampering?

The device used to secure electrical equipment against tampering is a combination of a locking device and a captive pentahead bolt. This option is effective because it integrates a strong locking mechanism with a specialized bolt designed to prevent unauthorized access.

A standard lock, while useful in many contexts, may not provide the specialized security required for electrical equipment, as it can often be picked or bypassed. A pentahead bolt alone is also not as effective without a locking mechanism, as it primarily serves to offer a unique type of fastening that is harder to remove, but it's the combination with a locking device that enhances its security features. A chain lock, while it does provide a level of security when used properly, offers less protection when compared to the specific design of a captive pentahead bolt in conjunction with a locking mechanism.

The integration of both elements ensures that not only is there a physical barrier to tampering, but also that the tools needed to access the equipment are not common, thereby significantly reducing the likelihood of unauthorized interference. This makes the combination the superior choice for safeguarding electrical equipment.