P Series PlexPower™ panelboards provide flameproof protection for lighting, heat trace and power circuit distribution in Zone 1-2 and 21-22 environments. They incorporate multiple, specially designed component-level enclosures that offer flameproof protection while housing off-the-shelf circuit breakers. These flameproof enclosures allow breakers to be replaced in the field, unlike expensive epoxy-encapsulated breakers. This inventive method of component-level protection, combined with a busbar design and modular configuration, delivers unprecedented installation flexibility and maintenance simplicity. Small terminal junction boxes designed to facilitate electrical connections in hazardous areas.