AL Runway Practice Questions - Alabama Runway Contractor Examination Exam

Series airfield lighting circuits commonly use isolation transformers at each light primarily to:

Increase the lamp voltage above circuit rating continuously without control Isolate the individual fixture so a single lamp failure does not open the entire series circuit Convert the runway into a taxiway electrically Eliminate the need for a constant current regulator

Correct Answer:

Isolate the individual fixture so a single lamp failure does not open the entire series circuit

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