The National Association of Fire Investigators (NAFI) will host ISFI 2018 which is the 8th presentation of a biennial professional symposium. Steve Hamilton will be presenting Is That Neutral Floating? which covers fire investigations that are electrical in origin. Of these potential electrical fires, an open neutral, or floating neutral, is a special consideration.. When the electrical system loses continuity in the neutral, some of the connected loads may be exposed to elevated voltages, while other loads see reduced voltages. These abnormal voltages can lead to unexpected failures of electrical devices. Register here.