(a) Electric drills or other electrically operated rotating tools intended to be held in hands shall have the electric switch constructed so as to break the circuit when the hand releases the switch or shall be equipped with friction or safety clutches.
(b) All new trailing cables installed after November 21, 1975, shall meet the requirements set out by the Secretary of the Interior in Bureau of Mines schedule 2G and in subsequent revisions.
(c) Cables for portable underground electric equipment shall be provided with suitable overload protection and power taps, unless properly connected to permissible junction or distribution boxes.