Square D? I-Line Power Distribution Panelboards is ideal for service entrance equipment or downstream distribution panels in the electrical system and is used to feed NQ and NF lighting and appliance panelboards. The I-Line power distribution panelboard is the most versatile on the market and feature Schneider Electric's unique breaker engagement system which allows 15 A branch circuit breaker next to or across from a 1200 A circuit breaker. I-Line panelboards are capable of feeding large motor loads and are UL Listed for use on systems with up to 200K max. These panelboards can come with a main breaker or main lug configuration and 400?1200A main lugs only and 100?1200A main circuit breakers. This door kit is used with HCM I-line distrubution panelboard and is surface mounted. The door kit has a height of 65.48 in and a width of 28.75 in. This product is certified to cULus & CE standards.