Abstract: A poleshaped supporting member (1) having a tubular cross-section, and a base structure (2) for attachment of same, said poleshaped member (1) having a conically tapering cross-section in direction from the ground plane, said base structure (2) including an attachment member (3) having a conicity and external shape which substantially corresponds to the internal larger portion of the poleshaped member (1). By means of at least one clamping member surrounding the poleshaped member (1), located at the portion embracing the attachment member (3), said portion can be pressed into frictional contact against the attachment member (3). At both the upper portion of the attachment member (3), and the larger portion of the poleshaped member (1), electrical connecting members (5, 6) are arranged, joined to a voltage feeding cable (4) respectively a cable (7) surrounded by the poleshaped member (1), connected to a directly or indirectly suspended electrical fitting.