Hearth Products Controls 695 Fire NEMA 3R Box Enclosure w/ 12 Hour Timer Switch. HPC Fire 695-NEMA Commercial Outdoor 12 Hour Automatic Shut Off Timer with NEMA Enclosure allows you to control your outdoor appliance with an automatic shut-off timer - perfect for your electronic gas fire pit.Set your appliance to automatically shut off using 15 minute intervals, up to 2 hours, to ensure the appliance isn't accidentally left on. Automatic Shut-Off Timer with 2 hour Time Limit, 15 Minute Interval Settings. Cannot be programmed for automatic startup for safety reasons. If you have any questions, feel free to ask.