Patent ID: 6992558

Claim:
An electric ballast comprising an electric coil with coil windings having a width d which are wound on a synthetic resin coil base ( 10 ) including a box-like base part comprising four faces arranged so as to form a rectangle for accommodating a metal core, said base part being provided on either side with mutually parallel flanges ( 121 , 122 ) limiting the width d of the coil windings, characterized in that: (i) the coil base ( 10 ) is provided with a connection member ( 250 ) for engaging an external electrical connector; (ii) the ballast further comprises a separate insulating synthetic resin cover ( 20 ) which includes as a part thereof an external insulator ( 25 ) which engages said connection member ( 250 ) of the coil base ( 10 ); and (iii) the cover ( 20 ) engages the coil base ( 10 ) and cooperates therewith to substantially completely enclose the coil windings.