(57) Conductor (1, 1', 2) and non-conductor (3,3) components, have uniform cross-section.
The nominal cross-section, including two single interspaced bars (1, 1') provides
a channel (101) with two parallel opposed walls (10, 10'), set at such a distance
(2r - 2h) to receive screws (5), particularly self-tapping screws, cutting their own
thread (5', 5') into the same walls (10, 10'), whereby terminals (9) can be connected
and an elastic strain (Te) is provided, to prevent unscrewing. Each bar unit comprises five components (1,
1', 2, 3, 3), three of which (1, 1', 2) are conductor and two (3, 3) non-conductor.,
wherein the centrifugal components (2, 3), act as encompassing members. The ensemble
(3, 01, 3,3, 02, 3,3, 03, 3,3, 04, 3) is bound by a frame (7) including longitudinal
rods (70, 70') with grooves (00), for fastening grounded conductors terminals (9).
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