Other items within the lobby were individually ruled out until the only plausible cause was the submersible aquarium heater. Arc mapping of the EMT conduit which supplied power to a fish tank in the lobby revealed no arcing within the conduit which ran overhead through the fire department’s suspected area of origin. Arcing was, however, found in the submersible fish tank heater, proving that arcing in the fish tank heater preceded the fire damage in the attic space of the adjacent office. Electrical arcing within the aquarium heater was first identified through radiograph imaging of the heater remains, with obvious evidence observed on the wiring and bus bars within the heater.
Thank you for your attention here! This 25W Submersible Aquarium Fish Tank Water Heater is to keep the water temperature steady. It is in double insulation and waterproof design, which can be submersible under water without any damage. High-quality plastic material makes it lightweight yet durable in use. The built-in indicator light indicates working state. With it, you can heat up water in fish tank in a short time. Rather easy to operate! Such a portable and practical tool is worth having!