For TRON In-Line Fuseholders HEC, HEG &HEH Series Insulating Boots Save Installation Time Boots come in two configurations - for single conductor and the “Y” type for two conductors. Designed to snugly fit over conductor insulation. Fits to wire by cutting off tapered tip. Diameter of conductor insulation cannot exceed 0.450". Inside of boots are treated with silicone to facilitate drawing of wire.
When boots are utilized, extra heat retention requires that fuses are sized at a minimum of 200% of the RMS load current.