Q: In a recent posting a question was raised about storage in a mechanical room. What about storage in an electrical room? Is it permitted?
A: In some cases storage is permitted, and in others, it is not. NFPA 70 National Electrical Code (1999 edition), section 450-21 limits storage in rooms containing dry-type transformers to 112½ kVA or less, as long as the combustible items stored are at least 12 inches clear of the transformer. However, the room must meet the requirements for hazardous areas found in sections 18/188.8.131.52 in the 2000 edition of the Life Safety Code, if the room is over 50 square feet. Electrical rooms housing liquid-filled transformers are required to be 1-hour fire resistant and storage would not be permitted. There are some exceptions to these requirements associated with NFPA 70 that you may qualify for. In regards to NFPA 13 Standard for the Installation of sprinkler Systems (1999 edition), section 5-13.11 permits electrical rooms to be excluded from having automatic sprinklers, provided the room is 2-hour fire resistant rated, and the room is not used for storage. So it appears that storage in electrical rooms would be permitted according to NFPA codes and standards, other than what has been identified in this response. As always, please check with your local and state authorities to determine if they have any additional limitations.