PANELBOARD WITH PROVISION FOR OPTIONAL USE WITH MAIN BREAKER OR MAIN LUGS WITH SPACED INSULATORS SUPPORTING MAIN BUS BARS

摘要

A panelboard is constructed so that at the option of the installer either a main circuit breaker or main lugs may be utilized, with the lugs occupying the same location that would be occupied by the circuit breaker. The main lugs as well as the main circuit breaker may be mounted at either end of the main bus bars in the space between the insulators that support the bus bars.