This cable is a training version of the one used to supply electricity to a black and white Westinghouse television camera of the type used to broadcast Neil Armstrong's first step on the Moon to the world. The television camera, stowed inside the Modular Equipment Stowage Area (MESA) of lunar module decent stage, was activated just prior to the first steps via a lanyard system by the astronaut. After Armstrong's historic first step, the television camera was moved to a stand away from the lunar module and connected to a longer power cable to allow wider angle television shots of lunar surface activities.
NASA transferred this power cable to the Museum in 1973.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.