the invention provides a circuit breaker panel with several safety features . the main breaker is separated from the circuit breakers by a non - conducting shield . the main breaker is also covered by a transparent , non - conducting shield . a further transparent non - conducting shield separates the circuit breakers from the neutral and ground bus bars . the neutral and ground bus bars are offset from one another to prevent wire crowding . bending posts extending from the back plate of the panel help control the wire in the panel to prevent it from crossing bus bars or circuit breakers .