A Boston Fire Department worker suffered an electric shock Friday when the fire alarm system cable he was working on came into contact with a 25,000-volt line that powered commuter rail trains, a department spokesman said.

The man was taken to Brig­ham and Women’s Hospital to be examined. His injuries were not life-threatening, said spokesman Steve MacDonald. A second worker suffered ringing in his ears from a loud boom emitted during the accident. Both men were later released from the hospital.