When is it permissible to install transformers in attics?

Installing transformers in attics is permissible when there is an access door of at least a specified size. This requirement ensures that there is adequate access for installation, maintenance, and servicing of the transformer. Adequate access is crucial for safety reasons, allowing technicians to reach the equipment without difficulty, which helps minimize the risk of accidents during maintenance operations.

The presence of a properly sized access door also contributes to good practices in electrical installations by allowing for ventilation and preventing overheating, which could occur in confined spaces like attics. Having proper access ensures compliance with safety codes and standards, which are designed to protect both the equipment and the personnel who work with it.

Other options, such as installing transformers with no access point, only in new construction, or only during certain weather conditions, do not address the essential safety and practicality concerns associated with maintenance and accessibility.