| 摘要 |
<p>PURPOSE:To safely perform the earth fitting work without error and prevent an unexpected accident by fitting a fastening tool provided with a wrench section and a nut section to the head section of the fastening bolt of a grounding metal and the planted bolt of an electric wire connecting metal in turn, and connecting or removing it. CONSTITUTION:When earth is to be applied to a power transmission line, a fastening tool 14 is fitted to the head section 13 of the fastening bolt 11 of a grounding metal 7, the bolt 11 is fastened via the tool 14, and the grounding metal 7 is connected to the earth main body. The fastening tool 14 is removed from the grounding metal 7, it is screwed to the planted bolt 3 of an electric wire connecting metal 2 as a nut, an earth wire 6 is fitted to the electric wire connecting metal 2, and the connecting metal 2 is pinched on the power transmission line to apply earth. If the procedures are mistaken to fit the electric wire connecting metal 2 to the earth wire 6 with the fastening tool 14 and pinched on the power transmission line from the first, the fastening bolt 11 can not be rotated because the fastening tool 14 is located at a high position in use. The fitting error is sensed, and an accident can be prevented.</p> |
