Abstract: An ignitor disabler for disabling an ignitor in a high intensity discharge lamp monitors the operating or characteristic voltage of the lamp. When the characteristic voltage of the lamp exceeds an AC threshold established by the disabler, the ignitor disabler disables the ignitor to prevent spurious pulses. In this manner, the ignitor is effectively disabled during periods when the lamp is operating abnormally. The ignitor disabler includes a timing network which is reset only when an excessive voltage is detected. The reset portion of the disabler includes a field effect transistor for discharging the timing network.

Abstract: An electrical entry is provided to secure an armored electrical cable to an access port of an electrical enclosure. The cable entry has a body portion for securing to the enclosure, with a passage therethrough to receive the armored cable, and a plurality of chuck members each internally profiled to engage the corrugations of the metal armor. The outer surface portions of the chuck members are tapered to engage a radially inner tapered portion of the entry body, and a compression nut axially compresses the chuck members within the entry body into gripping relation with the cable armor to mechanically secure and electrically ground it; a seal is provided within the entry to prevent passage of moisture or liquid through the entry.