Abstract: At 10:20 a.m. on December 29, 2010, Employee #1, a regular, full time salesperson of a security and alarm company, was surveying a worksite at a customer's home in Hanford, CA for fire alarm system installation design specifications. Under his own direction, he climbed onto a 6-foot to 10-foot ladder to assist the employer's electrical contractor in locating wires. As Employee #1 was attempting to guide or thread fire alarm cable through the ceiling and walls of the home, he fell off the ladder. Employee #1 was transported to Fresno Community Regional Medical Center via ambulance. He was admitted at 11:24 a.m., hospitalized, and treated for a closed head injury and fractures of the jaw, temporal bone, clavicle, and ribs on the left side of his body. The employer telephoned the Cal/OSHA Fresno District Office to report the incident on December 30, 2010.