Square D I-Line Busway is broad range of busway products that are used to provide electrical distribution in your both commercial and industiral applications. I-Line™ electrical busway offers a complete line of compatible, sandwich-type feeder and plug-in busway lengths and fittings. These busways are consturcted in three-pole and four-pole neutral configurations for system voltages of 600 volts and are rated to allow 100% of the current to flow. These busways are designed specifically to allow maximum flexibility, ease installation and offer electrical efficiency in the distribution of low power. This product is plug-in fusible unit that is rated at 100 A and has a maximum voltage of 600 V. This unit plugs in to a 4-pole busway, uses a class H fuse and UL and CSA Certified.