Core
Magnetic core: part or parts of amperometric clamp meters enclosing a current-carrying conductor and enabling conversion of the magnetic field generated by the current flowing in this conductor
Source: "GOST R IEC 61010-2-032-99. State Standard of the Russian Federation. Safety of electrical measuring instruments and laboratory equipment. Part 2-032. Particular requirements for manual amperometric clamp meters for electrical measurements and tests"
(adopted and introduced into force by the Decree of the Russian State Standards Committee dated October 29, 1999 No. 388-st)