Which manufacturer is NOT approved for supporting devices according to Wendy's specifications?

The manufacturer that is not approved for supporting devices according to Wendy's specifications is 3M. This indicates that 3M does not meet the specific criteria or standards required by Wendy’s for their electrical installations or supporting devices.

In practice, each manufacturer's products undergo a thorough review process to ensure they align with the strict specifications laid out by a company. Factors influencing approval can include product performance, reliability, compliance with safety regulations, compatibility with existing systems, and overall cost-effectiveness.

In contrast, other manufacturers like WAGO, Leviton, and Carolina have likely been vetted and meet the required specifications set by Wendy's. Therefore, their products can confidently be used in installations per Wendy's standards, affirming their credibility and reliability for use in supporting devices.