Square D EJB14030 is a 1-pole, 30-amp miniature circuit breaker from Square D’s E-Frame family, designed for bolt-on installation in NF panelboards and rated for 277 VAC. It uses a thermal-magnetic trip mechanism with an interrupting rating of 65 kAIC at 277 VAC and accepts 14-6 AWG aluminum or copper conductors via aluminum lug terminals. This single-pole device protects branch circuits in electrical distribution panels and is a common component in Square D NF panelboard installations. As part of the E-Frame bolt-on line, the EJB14030 is suited for 277 VAC circuits where reliable overcurrent protection is required.
