Manual switch on the side of the secondary distribution box

A manual transfer switch is installed next to the main service panel to override the normal electrical service with power from a backup generator during a power outage. Manual transfer switchesrequire an oper. [pdf]

Motherboard FC Interface

Modern bit serial interfaces connect a hard disk drive to a host bus interface adapter (today in a PC typically integrated into the "") with one data/control cable. Each drive also has an additional power cable, usually direct to the power supply unit. • DECs (SDI) was an early example of a modern bit serial interface. [pdf]