NEC rules sometimes refer to "the yoke".
For example: 1999 NEC § 210-4(b):
Dwelling Units. In dwelling units, a multiwire branch circuit
supplying more than one device or equipment on the same yoke shall be
provided with a means to disconnect simultaneously all ungrounded
conductors at the panelboard where the branch circuit originated.
What is meant by the term 'Yoke' as used in the NEC?
Best Answer
The 'Yoke' is the structural frame of a receptacle or switch:
It is often metal, with holes for two captive mounting screws, and should almost certainly be grounded if a grounding conductor is present.
Examples: